From eoas-seminar at lists.fsu.edu  Sun Mar  1 15:30:15 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Sun, 1 Mar 2020 15:30:15 -0500
Subject: [Eoas-seminar] EOAS Colloquium Friday March 6: Prof. Melissa
 Gervais (Penn State)
Message-ID: <mailman.6690.1583094621.3065.eoas-seminar@lists.fsu.edu>

Dear all, 

This Friday March 6 at 3:30 PM the EOAS Colloquium in 1050 EOA will be given by Prof. Melissa Gervais <http://www.met.psu.edu/people/mmg62> of Penn State University. Prof. Gervais will speak about ?The North Atlantic warming hole: From causes to impacts? (abstract below).  

Prof. Gervais has broad interests in climate dynamics, in particular, how changes in surface forcing by the oceans and sea ice might influence atmospheric circulation. Please contact Allison Wing (awing at fsu.edu <mailto:awing at fsu.edu>) if you would like to meet with Prof. Gervais. 

We hope to see you all there! 

=================
Title: The North Atlantic warming hole: From causes to impacts
Abstract: A warming deficit in North Atlantic sea surface temperatures (SSTs) is a striking feature in global climate model future projections.  Such changes in ocean temperature themselves can have implications for fisheries and wildlife and furthermore this region of reduced warming could have an impact on weather downstream over Europe.   The goal of this work is to obtain a holistic understanding of the coupled processes involved in both the development of the warming hole and it?s impacts on the atmosphere.  An analysis of the Community Earth System Model Large Ensemble simulations is conducted to obtain further insight into the development of the warming hole and its relationship to the Atlantic meridional overturning circulation.  In particular the important roles of increased freshwater flux and local changes in the ocean circulation on the development of the warming hole will be discussed.  A series of large ensemble CESM prescribed sea surface temperature (SST) and sea ice experiments are conducted where the warming hole is either filled or deepened to understand how the warming hole might influence the atmosphere. The results show both a direct linear response and an indirect eddy driven response that acts to strength and shift the North Atlantic jet poleward.  These local changes in the North Atlantic eddy driven jet are of a similar magnitude to the full climate change response in the region, indicating that the North Atlantic warming hole could be an important additional factor in the ?tug of war? on the midlatitude circulation that has yet to be explored.  Finally, the impacts of the warming on European weather are explored with the use of a machine learning method, self-organizing maps. 


--------------------------------------------
Allison A. Wing, Ph.D.
Assistant Professor
Department of Earth, Ocean, and Atmospheric Science
Florida State University
awing at fsu.edu

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From eoas-seminar at lists.fsu.edu  Mon Mar  2 18:01:03 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 2 Mar 2020 23:01:03 +0000
Subject: [Eoas-seminar] Seminar Tuesday March 3rd EOA 1044
In-Reply-To: <mailman.5685.1582817612.3065.eoas-seminar@lists.fsu.edu>
References: <mailman.5685.1582817612.3065.eoas-seminar@lists.fsu.edu>
Message-ID: <mailman.7323.1583190066.3065.eoas-seminar@lists.fsu.edu>


On Feb 27, 2020, at 10:33 AM, eoas-seminar--- via Eoas-seminar <eoas-seminar at lists.fsu.edu<mailto:eoas-seminar at lists.fsu.edu>> wrote:

Dear all,

Emily Stewart will be visiting us next week, i.e., March 3rd-4th. She is a candidate for the faculty search in "Solid Earth Processes in the Lithosphere (Metamorphic Petrology)?. Please let me know if you would like to meet the candidate. I am attaching her CV.

I am also attaching the title and abstract of her talk. The talk is scheduled at 3:30 PM on 3rd March 2020 (Tuesday) at EOA 1044.

Title: Rock Metamorphism, the Global Carbon Cycle, and Planetary Habitability

Abstract: Planet Earth has supported life for billions of years. Despite profound changes in the surface environment and the deep Earth, our climate has remained relatively
stable ? and critically, habitable ? over this time period. This stability is a result of the geologic Global Carbon Cycle, which acts to exchange carbon between the solid Earth,
oceans, and atmosphere on timescales of ~1 million years or longer. A detailed understanding of this exchange provides an essential framework for consideration of the origin and
evolution of life, the structure and composition of the deep mantle, and myriad Earth surface processes.

Although the lithosphere represents a small proportion of the solid Earth, it is the location of several key processes, linking carbon transfer in the ocean-atmosphere system to the
deep mantle carbon cycle. While the literature has historically focused on volcanic-magmatic processes in the crust, my advances in the observation and modeling of metamorphic
reactions demonstrate that rock metamorphism plays an equally important role in carbon mobility.

I will review the results of two studies: first, a field-based project in the Acadian metamorphic belt of New England reveals that mountain-building has the potential to release
significant CO??2 and drive climate change over millions of years. Second, a comprehensive study of an ancient subduction zone in the Cycladic Islands of Greece shows that
metamorphism alone may release about half of all carbon from a subducting slab, driving carbon depletion of the mantle over Earth history. Finally, I will explore future work on
contact metamorphism and its relationship to both long term and catastrophic climate events in deep time.

Thank you
Mainak
----------------------------------------------------------------------------
Mainak Mookherjee
Associate Professor
Earth, Ocean and Atmospheric Sciences
Florida State University
Tallahassee, Fl, 32310, USA

Phone:(850) 644-1536 (Office)
Email: mmookherjee at fsu.edu<mailto:mmookherjee at fsu.edu>
Email: mainak.mookherjee at gmail.com<mailto:mainak.mookherjee at gmail.com>
URL:http://myweb.fsu.edu/mmookherjee<http://myweb.fsu.edu/mmookherjee>
----------------------------------------------------------------------------

<Stewart_CV.pdf>_______________________________________________
Eoas-seminar mailing list
Eoas-seminar at lists.fsu.edu<mailto:Eoas-seminar at lists.fsu.edu>
https://lists.fsu.edu/mailman/listinfo/eoas-seminar

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From eoas-seminar at lists.fsu.edu  Wed Mar  4 08:54:15 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Wed, 4 Mar 2020 13:54:15 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Brian Mackey, Wednesday,
 March 11, 2020, 3:30 PM, Love 353 (NOTE room change)
Message-ID: <mailman.8158.1583330057.3065.eoas-seminar@lists.fsu.edu>

Meteorology Seminar

Brian Mackey

PhD Meteorology Candidate



Title:  Heavy Rainfall Enhanced by Warm Season Fronts and Orography in Western North Carolina:  Synoptic Classification and Physical Drivers

Major Professor:  Dr. Jon Ahlquist

Date: March 11, 2020                              Time: 3:30 PM



Location: Werner A. Baum Seminar Room (353 Love Building) NOTE room change

ABSTRACT

Physical processes that enhance heavy rainfall in association with warm season (April--September) fronts are investigated over western North Carolina. In this region of complex terrain encompassing the basins of the Upper Catawba River, the South Yadkin River, and the Upper Yadkin River, quantitative precipitation estimates and forecasts exhibit known biases, and a variety of large-scale atmospheric patterns can lead to heavy rainfall and flash flooding. The focus is on events with space-time dimensions on the meso-$\beta$ scale (horizontally up to 200 km and temporally up to about 12--18 hours). The most frequent internally forced mesoscale weather features that produce such heavy rainfall episodes in the region are mid-latitude fronts. External mechanical forcing due to the orography of the southern Appalachians also plays an important role in shaping the rainfall intensity and distribution.

A 17-year climatology comprised of 98 heavy rainfall cases is constructed using daily 4-km stage IV precipitation analyses. Cases are categorized according to the type of front (cold or stationary), front location (if stationary) relative to the study area (north, south, or over the basins), time of year (April and September vs. May--August), and time of day of peak rainfall. Classical warm front cases are too few to be included in this study. Results show that the majority of warm season heavy rainfall episodes tend to peak in the afternoon or evening, but there is a notable exception regarding events associated with stationary fronts located south of the basins. These episodes have a nocturnal maximum in rainfall in the foothills of the Blue Ridge Mountains, suggesting an interaction between the small-scale mountain-valley breezes and a mesoscale easterly low-level jet.

The front type clusters are further evaluated utilizing the latest fifth-generation reanalysis (ERA5) produced by the European Centre for Medium-Range Weather Forecasts. Through the use of percentile rankings, the raw values of precipitable water and convective available potential energy are transformed into more meaningful and useful quantities that show well-defined maxima in and around the study region. For cold fronts as well as April and September cases of stationary fronts south of the basins, correlation analysis shows that the presence/strength of an atmospheric river plays a key role in determining the amount and areal extent of heavy rainfall. Also quantified is the low-level upslope flow, which helps regulate the spatial and temporal variability of heavy rainfall for nearly all frontal regimes in the study. In addition, rainfall events associated with stationary fronts to the north of the basins are heaviest when those fronts retreat farther north and west, coincident with a stronger Atlantic high pressure cell which increases the low-level moisture transport up the slopes of the Blue Ridge Mountains. For stationary fronts over the basins, the cases with the heaviest, most widespread rainfall are associated with a sharper west-east moisture gradient from the mountain ridges to the North Carolina Piedmont.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Wed Mar  4 09:56:29 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Wed, 4 Mar 2020 14:56:29 +0000
Subject: [Eoas-seminar] MET Seminar Tuesday March 10: Dr. Kevin Bowley (Penn
 State)
Message-ID: <mailman.8215.1583333800.3065.eoas-seminar@lists.fsu.edu>

Dear all,

Next Tuesday March 10 at 3:30 PM we will have a Meteorology Seminar in 1044 EOA, given by Dr. Kevin Bowley<https://www.researchgate.net/profile/Kevin_Bowley> of Penn State University. Dr. Bowley will speak about ?Rossby wave breaking through the 21st century in a global climate model? (abstract below).

Dr. Bowley?s research interests include Rossby wave breaking, synoptic processes, and the weather-climate interface. More broadly, his interests are in synoptic meteorology, forecasting, and remote sensing. If you?d like to meet with Dr. Bowley, please contact Allison Wing (awing at fsu.edu<mailto:awing at fsu.edu>)

We hope to see you there!

Cheers,

Allison

=================
Title: Rossby wave breaking through the 21st century in a global climate model

Abstract: Rossby wave breaking (RWB) on the dynamic tropopause (DT) occurs when synoptic-scale Rossby waves become highly amplified and undergo a breaking process.  This process can result in significant meridional transport of air masses resulting and intrusions of low latitude air poleward, high latitude air equatorward, or a combination of the two.  The ensuing modification of the troposphere and lower stratosphere in response to such events have been areas of considerable research due to their potential impacts on both high- and low-frequency mid- and high-latitude variability.  Furthermore, the potential impacts of future changes in these events make them of considerable interest for identifying and studying in global climate model (GCM) simulations.

This talk will explore the application of a DT-centric RWB identification scheme to the NCEP Reanalysis-2 dataset to explore the regional distributions of RWB in the late 20th century along with linkages between RWB and well-known teleconnection patterns.  Next, RWB frequencies will be identified using three sets of 25-member Community Earth System Model (CESM) simulations with prescribed sea surface temperature and sea ice conditions over the historical period (2010-2019), mid-Century (2050-2059) and late-Century (2090-2099).  This dataset represents a unique opportunity to study Rossby wave breaking processes in future climate simulations on a dynamically evolving surface rather than the more common pressure levels or isentropic levels as the DT is calculated for each of the CESM members.  RWB frequencies modeled in the historical period are compared to the NCEP dataset to explore the ability of the CESM model in this configuration to reproduce these features accurately.  Furthermore, the three CESM periods of interest are examined to determine changes to the locations of Rossby wave breaking as well as changes to the dynamic and thermodynamic characteristics of composited Northern Hemisphere tropospheric circulation.



??????????????????
Allison Wing, Ph.D.
Assistant Professor
Earth, Ocean and Atmospheric Science
Florida State University
awing at fsu.edu<mailto:awing at fsu.edu>



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From eoas-seminar at lists.fsu.edu  Thu Mar  5 14:49:47 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 5 Mar 2020 19:49:47 +0000
Subject: [Eoas-seminar] Fw: MET faculty meeting on March 5, Thursday
In-Reply-To: <BN6PR02MB26445271CEA0307B645DD5A2B8E40@BN6PR02MB2644.namprd02.prod.outlook.com>
References: <BN6PR02MB26445271CEA0307B645DD5A2B8E40@BN6PR02MB2644.namprd02.prod.outlook.com>
Message-ID: <mailman.9007.1583437789.3065.eoas-seminar@lists.fsu.edu>

Hi all,

Just a remainder that we will have a faculty meeting within an hour at EOA 6067.

Best,

Zhaohua

________________________________
From: Zhaohua Wu
Sent: Tuesday, March 3, 2020 12:26 PM
To: eoas-metfaculty at lists.fsu.edu <eoas-metfaculty at lists.fsu.edu>
Cc: Shel McGuire <smcguire at fsu.edu>
Subject: MET faculty meeting on March 5, Thursday

Hi all,

We will have a MET faculty meeting on March 5, Thursday at EOA 6067. The following are updated items to be discussed:

(1) Update on graduate offers (Wu/Hart)
(2) Requests by two (?) students for pre-/co-req exemptions or recommendations (Shel/Hart)
(3) Statistics on met graduate class enrollment since 2013 and discussion of potential caps (Cai/Hart)
(4) Requests for summer teaching for 1010 lecture (Hart)
(5) On launching meteorological program at University of Florida's (all faculties)

Please let Philip and me know if you want to add more issues to discuss.

Cheers,

Zhaohua

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From eoas-seminar at lists.fsu.edu  Fri Mar  6 08:15:55 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Fri, 6 Mar 2020 13:15:55 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Alec Mau, Friday, March 13,
 2020, 1:30 PM, Love 353
Message-ID: <mailman.9220.1583500556.3065.eoas-seminar@lists.fsu.edu>

Meteorology Seminar

Alec Mau

M.S. Meteorology Candidate



Title:  tropical-midlatitude interaction inferred from the shapes of annual cycles

Major Professor:  Dr. Zhaohua Wu

Date: Friday, March 13, 2020                            Time: 1:30 PM



Location: Werner A. Baum Seminar Room (353 Love Building)


ABSTRACT

A given location's annual cycle of surface temperature is often used as a reference framework for climate anomalies through which the seasonal and interannual variability of the Earth's climate system can be quantified. Since local climate trends can be explained by the same fundamental physics that power a basic energy balance climate model, one of these models could theoretically simulate Earth's land surface temperature trend and then be used to predict its future evolution. Although general circulation models (GCMs) are considered the most accurate climate simulations, they are highly complex to diagnose direct responses from perturbations to individual parameters. This study focuses on building and parameterizing a simplified conceptual energy balance climate model that will be tested to 1) simulate observational annual cycles to prove the model's reasonable validity and 2) discover how Earth's climate system in an energy balance framework is sensitive to the considered parameters. Detailed explanations of the selected parameters surface albedo, greenhouse gas concentration and meridional heat transport are presented. Sensitivity testing of these parameters reveals that both tropical and midlatitude annual cycles are particularly sensitive to the meridional heat transport rate, followed by moderate sensitivity to surface albedo and little sensitivity to the greenhouse gas parameter. As less tropical-midlatitude communication occurs with a weakening meridional temperature gradient, the period of maximum heat transport lengthens, reflecting reduced midlatitude seasonal variability. Reduced seasonal variability is also apparent in annual cycles with small amplitudes. The results of this study demonstrate the usefulness of studying climate through a simplified energy balance framework, even in a modern computer-intensive field with powerful GCMs.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Fri Mar  6 08:37:02 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Fri, 6 Mar 2020 08:37:02 -0500
Subject: [Eoas-seminar] EOAS Colloquium Friday March 6: Prof. Melissa
 Gervais (Penn State)
In-Reply-To: <mailman.6690.1583094621.3065.eoas-seminar@lists.fsu.edu>
References: <mailman.6690.1583094621.3065.eoas-seminar@lists.fsu.edu>
Message-ID: <mailman.9229.1583501827.3065.eoas-seminar@lists.fsu.edu>

Dear all, 

This is a reminder of today?s EOAS colloquium at 3:30 in 1050 EOA, given by Prof. Melissa Gervais from Penn State. She will speak about ?The North Atlantic warming hole: From causes to impacts?.

Hope to see you all there! 

Cheers, 

Allison

Sent from my iPhone

> On Mar 1, 2020, at 3:30 PM, eoas-seminar--- via Eoas-seminar <eoas-seminar at lists.fsu.edu> wrote:
> 
> ? Dear all, 
> 
> This Friday March 6 at 3:30 PM the EOAS Colloquium in 1050 EOA will be given by Prof. Melissa Gervais of Penn State University. Prof. Gervais will speak about ?The North Atlantic warming hole: From causes to impacts? (abstract below).  
> 
> Prof. Gervais has broad interests in climate dynamics, in particular, how changes in surface forcing by the oceans and sea ice might influence atmospheric circulation. Please contact Allison Wing (awing at fsu.edu) if you would like to meet with Prof. Gervais. 
> 
> We hope to see you all there! 
> 
> =================
> Title: The North Atlantic warming hole: From causes to impacts
> Abstract: A warming deficit in North Atlantic sea surface temperatures (SSTs) is a striking feature in global climate model future projections.  Such changes in ocean temperature themselves can have implications for fisheries and wildlife and furthermore this region of reduced warming could have an impact on weather downstream over Europe.   The goal of this work is to obtain a holistic understanding of the coupled processes involved in both the development of the warming hole and it?s impacts on the atmosphere.  An analysis of the Community Earth System Model Large Ensemble simulations is conducted to obtain further insight into the development of the warming hole and its relationship to the Atlantic meridional overturning circulation.  In particular the important roles of increased freshwater flux and local changes in the ocean circulation on the development of the warming hole will be discussed.  A series of large ensemble CESM prescribed sea surface temperature (SST) and sea ice experiments are conducted where the warming hole is either filled or deepened to understand how the warming hole might influence the atmosphere. The results show both a direct linear response and an indirect eddy driven response that acts to strength and shift the North Atlantic jet poleward.  These local changes in the North Atlantic eddy driven jet are of a similar magnitude to the full climate change response in the region, indicating that the North Atlantic warming hole could be an important additional factor in the ?tug of war? on the midlatitude circulation that has yet to be explored.  Finally, the impacts of the warming on European weather are explored with the use of a machine learning method, self-organizing maps. 
> 
> 
> --------------------------------------------
> Allison A. Wing, Ph.D.
> Assistant Professor
> Department of Earth, Ocean, and Atmospheric Science
> Florida State University
> awing at fsu.edu
> 
> _______________________________________________
> Eoas-seminar mailing list
> Eoas-seminar at lists.fsu.edu
> https://lists.fsu.edu/mailman/listinfo/eoas-seminar
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From eoas-seminar at lists.fsu.edu  Sun Mar  8 19:53:12 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Sun, 8 Mar 2020 19:53:12 -0400
Subject: [Eoas-seminar] MET Seminar Tuesday March 10: Dr. Kevin Bowley
 (Penn State)
In-Reply-To: <mailman.8215.1583333800.3065.eoas-seminar@lists.fsu.edu>
References: <mailman.8215.1583333800.3065.eoas-seminar@lists.fsu.edu>
Message-ID: <mailman.9873.1583711598.3065.eoas-seminar@lists.fsu.edu>

This is a reminder about the Meteorology seminar on Tuesday March 10, given by Dr. Kevin Bowley of Penn State. He will talk about ?Rossby wave breaking through the 21st century in a global climate model?

There are a couple of spots still available to meet with Dr. Bowley, so please contact Allison Wing (awing at fsu.edu) if you are interested. 

Cheers, 

Allison

Sent from my iPhone

> On Mar 4, 2020, at 9:57 AM, eoas-seminar--- via Eoas-seminar <eoas-seminar at lists.fsu.edu> wrote:
> 
> ?
> Dear all, 
> 
> Next Tuesday March 10 at 3:30 PM we will have a Meteorology Seminar in 1044 EOA, given by Dr. Kevin Bowley of Penn State University. Dr. Bowley will speak about ?Rossby wave breaking through the 21st century in a global climate model? (abstract below). 
> 
> Dr. Bowley?s research interests include Rossby wave breaking, synoptic processes, and the weather-climate interface. More broadly, his interests are in synoptic meteorology, forecasting, and remote sensing. If you?d like to meet with Dr. Bowley, please contact Allison Wing (awing at fsu.edu)
> 
> We hope to see you there! 
> 
> Cheers, 
> 
> Allison
> 
> =================
> Title: Rossby wave breaking through the 21st century in a global climate model
> 
> Abstract: Rossby wave breaking (RWB) on the dynamic tropopause (DT) occurs when synoptic-scale Rossby waves become highly amplified and undergo a breaking process.  This process can result in significant meridional transport of air masses resulting and intrusions of low latitude air poleward, high latitude air equatorward, or a combination of the two.  The ensuing modification of the troposphere and lower stratosphere in response to such events have been areas of considerable research due to their potential impacts on both high- and low-frequency mid- and high-latitude variability.  Furthermore, the potential impacts of future changes in these events make them of considerable interest for identifying and studying in global climate model (GCM) simulations. 
> This talk will explore the application of a DT-centric RWB identification scheme to the NCEP Reanalysis-2 dataset to explore the regional distributions of RWB in the late 20th century along with linkages between RWB and well-known teleconnection patterns.  Next, RWB frequencies will be identified using three sets of 25-member Community Earth System Model (CESM) simulations with prescribed sea surface temperature and sea ice conditions over the historical period (2010-2019), mid-Century (2050-2059) and late-Century (2090-2099).  This dataset represents a unique opportunity to study Rossby wave breaking processes in future climate simulations on a dynamically evolving surface rather than the more common pressure levels or isentropic levels as the DT is calculated for each of the CESM members.  RWB frequencies modeled in the historical period are compared to the NCEP dataset to explore the ability of the CESM model in this configuration to reproduce these features accurately.  Furthermore, the three CESM periods of interest are examined to determine changes to the locations of Rossby wave breaking as well as changes to the dynamic and thermodynamic characteristics of composited Northern Hemisphere tropospheric circulation.
> 
> 
> 
> 
> ??????????????????
> Allison Wing, Ph.D.
> Assistant Professor
> Earth, Ocean and Atmospheric Science
> Florida State University
> awing at fsu.edu
> 
> 
> 
> <MET_Seminar_Flyer_Bowley.pdf>
> _______________________________________________
> Eoas-seminar mailing list
> Eoas-seminar at lists.fsu.edu
> https://lists.fsu.edu/mailman/listinfo/eoas-seminar
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From eoas-seminar at lists.fsu.edu  Mon Mar  9 08:14:36 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 9 Mar 2020 12:14:36 +0000
Subject: [Eoas-seminar] Oceanography Thesis Defense - Wenbo Li - Mar 16,
 10am - 6067EOA
Message-ID: <mailman.10006.1583756078.3065.eoas-seminar@lists.fsu.edu>

Title: Insights into organic matter sources in glacier environments

Major Professor: Rob Spencer




Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Mon Mar  9 09:50:37 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 9 Mar 2020 09:50:37 -0400
Subject: [Eoas-seminar] No Colloquium - Fri Mar 13
Message-ID: <mailman.10114.1583761841.3065.eoas-seminar@lists.fsu.edu>

There will be no Colloquium this Friday as there is a Faculty retreat.

Our next Colloquium seminar will be by Dr. Rhys Parfitt on Friday Mar 27.



From eoas-seminar at lists.fsu.edu  Mon Mar  9 16:20:13 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 9 Mar 2020 20:20:13 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Jerry Kung, Monday,
 March 23, 2020, 11:00 AM, Love 353
Message-ID: <mailman.10402.1583785215.3065.eoas-seminar@lists.fsu.edu>

Meteorology Seminar

Jerry Kung

M.S. Meteorology Candidate



Title:  Three modeling approaches to predicting pyrocumulus formation during prescribed burns at eglin air force base, florida

Major Professor:  Dr. Jeffrey Chagnon

Date: Monday, March 23, 2020                        Time: 11:00 AM



Location: Werner A. Baum Seminar Room (353 Love Building)



ABSTRACT


Prescribed burning is a land management technique conducted at Eglin Air Force Base (AFB), Florida, by Jackson Guard.  Sometimes a fire-induced cumulus cloud, called a pyrocumulus (pyroCu), forms over a surface fire.  A towering pyrocumulus can lead to downbursts that challenge Jackson Guard teams' capacity to keep fire behavior under control.  There has been scant effort devoted to forecasting pyrocumuli accurately.  This thesis presents three different methods for predicting pyrocumulus formation prior to scheduled burns at Eglin AFB: numerical modeling, statistical regression, and qualitative modeling.  The numerical modeling approach entailed simulating 14 burn dates using the Weather Research and Forecasting (WRF) model's coupled fire-atmosphere module, WRF-Fire.  A Rate-of-Spread (ROS) parameter was developed for simulating the outcomes of future burns, with the prescribed burn model matching observed pyrocumuli at a 71% success rate.  The statistical regression approach used a sample of 31 burn dates to build, train, and test a statistical model using logistic regression.  The statistical model performed with 74% accuracy in hindcasting the sample size's observed outcomes.  In the third approach, a qualitative model was built and tested on the same 31 burn dates' thermodynamic soundings and burn parameters.  The categorization algorithm was converted into a flowchart, with decision points trained to optimally predict the sample's observed outcomes, hindcasting pyrocumulus formation at a 74% success rate.  These approaches to prediction yielded three distinct operational tools for Jackson Guard.  While higher success rates were not obtained this time, a fruitful proof of concept was accomplished.  Furthermore, the three methodological frameworks can all be tailored for fixed-site prescribed burn operations outside northwestern Florida.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Tue Mar 10 10:20:12 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 10 Mar 2020 14:20:12 +0000
Subject: [Eoas-seminar] Reminder: MET Seminar Today at 3:30: Dr. Kevin
 Bowley (Penn State)
In-Reply-To: <mailman.9873.1583711598.3065.eoas-seminar@lists.fsu.edu>
References: <mailman.8215.1583333800.3065.eoas-seminar@lists.fsu.edu>
 <mailman.9873.1583711598.3065.eoas-seminar@lists.fsu.edu>
Message-ID: <mailman.10655.1583850016.3065.eoas-seminar@lists.fsu.edu>

One last reminder about today?s Meteorology seminar in 1044 EOA at 3:30!

?
Dear all,

Next Tuesday March 10 at 3:30 PM we will have a Meteorology Seminar in 1044 EOA, given by Dr. Kevin Bowley<https://www.researchgate.net/profile/Kevin_Bowley> of Penn State University. Dr. Bowley will speak about ?Rossby wave breaking through the 21st century in a global climate model? (abstract below).

Dr. Bowley?s research interests include Rossby wave breaking, synoptic processes, and the weather-climate interface. More broadly, his interests are in synoptic meteorology, forecasting, and remote sensing. If you?d like to meet with Dr. Bowley, please contact Allison Wing (awing at fsu.edu<mailto:awing at fsu.edu>)

We hope to see you there!

Cheers,

Allison

=================
Title: Rossby wave breaking through the 21st century in a global climate model

Abstract: Rossby wave breaking (RWB) on the dynamic tropopause (DT) occurs when synoptic-scale Rossby waves become highly amplified and undergo a breaking process.  This process can result in significant meridional transport of air masses resulting and intrusions of low latitude air poleward, high latitude air equatorward, or a combination of the two.  The ensuing modification of the troposphere and lower stratosphere in response to such events have been areas of considerable research due to their potential impacts on both high- and low-frequency mid- and high-latitude variability.  Furthermore, the potential impacts of future changes in these events make them of considerable interest for identifying and studying in global climate model (GCM) simulations.

This talk will explore the application of a DT-centric RWB identification scheme to the NCEP Reanalysis-2 dataset to explore the regional distributions of RWB in the late 20th century along with linkages between RWB and well-known teleconnection patterns.  Next, RWB frequencies will be identified using three sets of 25-member Community Earth System Model (CESM) simulations with prescribed sea surface temperature and sea ice conditions over the historical period (2010-2019), mid-Century (2050-2059) and late-Century (2090-2099).  This dataset represents a unique opportunity to study Rossby wave breaking processes in future climate simulations on a dynamically evolving surface rather than the more common pressure levels or isentropic levels as the DT is calculated for each of the CESM members.  RWB frequencies modeled in the historical period are compared to the NCEP dataset to explore the ability of the CESM model in this configuration to reproduce these features accurately.  Furthermore, the three CESM periods of interest are examined to determine changes to the locations of Rossby wave breaking as well as changes to the dynamic and thermodynamic characteristics of composited Northern Hemisphere tropospheric circulation.



??????????????????
Allison Wing, Ph.D.
Assistant Professor
Earth, Ocean and Atmospheric Science
Florida State University
awing at fsu.edu<mailto:awing at fsu.edu>



<MET_Seminar_Flyer_Bowley.pdf>
_______________________________________________
Eoas-seminar mailing list
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From eoas-seminar at lists.fsu.edu  Wed Mar 11 13:05:41 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Wed, 11 Mar 2020 17:05:41 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Brian Mackey, Wednesday,
 March 11, 2020, 3:30 PM, Love 353 (NOTE room change)
Message-ID: <mailman.11530.1583946343.3065.eoas-seminar@lists.fsu.edu>

Meteorology Seminar

Brian Mackey

PhD Meteorology Candidate



Title:  Heavy Rainfall Enhanced by Warm Season Fronts and Orography in Western North Carolina:  Synoptic Classification and Physical Drivers

Major Professor:  Dr. Jon Ahlquist

Date: March 11, 2020                              Time: 3:30 PM



Location: Werner A. Baum Seminar Room (353 Love Building) NOTE room change

ABSTRACT

Physical processes that enhance heavy rainfall in association with warm season (April--September) fronts are investigated over western North Carolina. In this region of complex terrain encompassing the basins of the Upper Catawba River, the South Yadkin River, and the Upper Yadkin River, quantitative precipitation estimates and forecasts exhibit known biases, and a variety of large-scale atmospheric patterns can lead to heavy rainfall and flash flooding. The focus is on events with space-time dimensions on the meso-$\beta$ scale (horizontally up to 200 km and temporally up to about 12--18 hours). The most frequent internally forced mesoscale weather features that produce such heavy rainfall episodes in the region are mid-latitude fronts. External mechanical forcing due to the orography of the southern Appalachians also plays an important role in shaping the rainfall intensity and distribution.

A 17-year climatology comprised of 98 heavy rainfall cases is constructed using daily 4-km stage IV precipitation analyses. Cases are categorized according to the type of front (cold or stationary), front location (if stationary) relative to the study area (north, south, or over the basins), time of year (April and September vs. May--August), and time of day of peak rainfall. Classical warm front cases are too few to be included in this study. Results show that the majority of warm season heavy rainfall episodes tend to peak in the afternoon or evening, but there is a notable exception regarding events associated with stationary fronts located south of the basins. These episodes have a nocturnal maximum in rainfall in the foothills of the Blue Ridge Mountains, suggesting an interaction between the small-scale mountain-valley breezes and a mesoscale easterly low-level jet.

The front type clusters are further evaluated utilizing the latest fifth-generation reanalysis (ERA5) produced by the European Centre for Medium-Range Weather Forecasts. Through the use of percentile rankings, the raw values of precipitable water and convective available potential energy are transformed into more meaningful and useful quantities that show well-defined maxima in and around the study region. For cold fronts as well as April and September cases of stationary fronts south of the basins, correlation analysis shows that the presence/strength of an atmospheric river plays a key role in determining the amount and areal extent of heavy rainfall. Also quantified is the low-level upslope flow, which helps regulate the spatial and temporal variability of heavy rainfall for nearly all frontal regimes in the study. In addition, rainfall events associated with stationary fronts to the north of the basins are heaviest when those fronts retreat farther north and west, coincident with a stronger Atlantic high pressure cell which increases the low-level moisture transport up the slopes of the Blue Ridge Mountains. For stationary fronts over the basins, the cases with the heaviest, most widespread rainfall are associated with a sharper west-east moisture gradient from the mountain ridges to the North Carolina Piedmont.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Wed Mar 11 13:07:55 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Wed, 11 Mar 2020 17:07:55 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Amanda Sava, Tuesday,
 March 24, 2020, 3:30 PM, EOA 1044
Message-ID: <mailman.11533.1583946477.3065.eoas-seminar@lists.fsu.edu>

Meteorology Seminar

Amanda Sava

Master's Meteorology Candidate



Title:   Unexplained nocturnally forming lightning in the ccafs/ksc area

Major Professor:  Dr. Henry Fuelberg

Date: March 24, 2020                              Time: 3:30 PM



Location: EOA Building room 1044

ABSTRACT


Cape Canaveral Air Force Station and Kennedy Space Center (CCAFS/KSC) experience thunderstorms on an almost daily basis during the warm season (May through September). Most thunderstorms occur during the afternoon and are accurately forecast. However, on rare occasions, thunderstorms form at night with no apparent cause. These unexpected events can catch forecasters off-guard, leading to missed lightning watches and unexpected dangerous situations. The goal of the present research is to address the lack of knowledge about these unexplained nocturnally forming lightning events near CCAFS/KSC and provide forecasters with additional information about the events. The study area is a rectangle centered on the Space Shuttle Roll-Out at KSC and is oriented parallel to Florida's coast. Lightning flash data from the Earth Networks Total Lightning Network (ENTLN) and the National Lightning Detection Network, and radar data from the National Weather Service Melbourne (NWS MLB) were used to identify case nights and null nights, and generate a climatology of case nights. Then, 24 different variables that consider atmospheric moisture, hydrostatic stability, and wind shear were investigated to identify a possible discriminating parameter between case nights and null nights. Results showed that July had the greatest occurrence of case nights, and that the greatest frequency of first flash times was at 0500 UTC, about 5 h after local sunset. The results also revealed that case nights had a slightly greater potential for convection, but unfortunately there was no variable that had a statistically significant difference at the 95% confidence interval between case nights and null nights.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 12 09:13:22 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 12 Mar 2020 13:13:22 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Jonathan Christophersen,
 Thursday, March 26, 2020, 3:30 PM, Love 353
Message-ID: <mailman.12043.1584018804.3065.eoas-seminar@lists.fsu.edu>

Meteorology Seminar

Jonathan Christophersen

PhD Meteorology Candidate



Title:  Observational analysis of atmospheric and oceanic diurnal cycles in the tropical Atlantic

Major Professor:  Dr. Philip Sura

Date: Thursday March 26, 2020                                   Time: 3:30 PM



Location: Werner A. Baum Seminar Room (353 Love Building)



ABSTRACT
Interactions between the lower atmosphere and upper ocean on diurnal time scales are assessed in the tropical Atlantic Ocean by combining over 20 years of observations from the Prediction and Research Moored Array in the Tropical Atlantic (PIRATA) with reanalysis, satellite, and model data. In the first section of this study, analysis of surface winds and pressure from PIRATA moorings along 23oW reveals semi-diurnal patterns in the 10-meter zonal wind anomalies and a diurnal pattern in the 10-meter meridional wind anomalies. Past research on the diurnal and semi-diurnal wind patterns observed in the tropical Pacific concluded that the zonal semi-diurnal wind patterns are consistent with migrating atmospheric thermal tidal (ATT) forcing. However, causes of the diurnal cycle in the meridional winds remains elusive. This work extends the past analysis in the tropical Pacific to show how the nonmigrating ATT drives the diurnal cycle of the meridional winds and how that leads to an offshore early morning precipitation maximum during the boreal summer in the tropical Atlantic basin.

Secondly, data from the Tropical Atlantic Current Observation Study (TACOS) at 4oN, 23oW is analyzed to better understand air-sea coupling in the equatorial Atlantic Ocean on short time scales. This particular PIRATA mooring offers high-temporal resolution (10 minute - 1 hour) wind, current, temperature, and salinity data from 2017 to the present. Equipped with 11 current sensors, this site uniquely resolves the diurnal cycle of vertical shear. Throughout the first deployment of the TACOS mooring (March 2017 - March 2018), the presence of a shear-variance layer was observed. Spectral analysis confirms that significant oscillations in the seasonal thermocline, due to the passage of internal tides, modulate the velocity field, altering the shear. During those times that experienced high diurnal SST amplitudes, the deepening nocturnal mixed layer interacts with the shear-variance reservoir, thereby enhancing marginal instability.

Upper-ocean processes are then compared between the PIRATA/TACOS observations and the Nucleus for European Modelling of the Ocean (NEMO) model in the last part of this study. Similarities and discrepancies in mixing processes, static stability, upper-ocean currents as a response to wind forcing, and other air-sea components are discussed. Discrepancies between the dynamic and thermohaline fields persist throughout the record of the analysis time period, thereby contributing to differences in the stratification and shear, resulting in the model being "over mixed".


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 12 15:34:39 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 12 Mar 2020 19:34:39 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Alec Mau, Friday, March 13,
 2020, 1:30 PM, Love 353 and on Zoom
Message-ID: <mailman.12500.1584041681.3065.eoas-seminar@lists.fsu.edu>

Please note, Alec Mau's defense will also be available as a Zoom meeting. To join the meeting see the information below.


Join Zoom Meeting
https://fsu.zoom.us/j/624257733<https://urldefense.com/v3/__https:/fsu.zoom.us/j/624257733__;!!Epnw_ITfSMW4!8in98aPciCLUikOnuevYdIoB-NGPT2TK6pqVkKeYXxUxeZltOcU_EEseFTu9nNdiYQ$>

Meeting ID: 624 257 733



Meteorology Seminar

Alec Mau

M.S. Meteorology Candidate



Title:  tropical-midlatitude interaction inferred from the shapes of annual cycles

Major Professor:  Dr. Zhaohua Wu

Date: Friday, March 13, 2020                            Time: 1:30 PM



Location: Werner A. Baum Seminar Room (353 Love Building) and online on Zoom


ABSTRACT

A given location's annual cycle of surface temperature is often used as a reference framework for climate anomalies through which the seasonal and interannual variability of the Earth's climate system can be quantified. Since local climate trends can be explained by the same fundamental physics that power a basic energy balance climate model, one of these models could theoretically simulate Earth's land surface temperature trend and then be used to predict its future evolution. Although general circulation models (GCMs) are considered the most accurate climate simulations, they are highly complex to diagnose direct responses from perturbations to individual parameters. This study focuses on building and parameterizing a simplified conceptual energy balance climate model that will be tested to 1) simulate observational annual cycles to prove the model's reasonable validity and 2) discover how Earth's climate system in an energy balance framework is sensitive to the considered parameters. Detailed explanations of the selected parameters surface albedo, greenhouse gas concentration and meridional heat transport are presented. Sensitivity testing of these parameters reveals that both tropical and midlatitude annual cycles are particularly sensitive to the meridional heat transport rate, followed by moderate sensitivity to surface albedo and little sensitivity to the greenhouse gas parameter. As less tropical-midlatitude communication occurs with a weakening meridional temperature gradient, the period of maximum heat transport lengthens, reflecting reduced midlatitude seasonal variability. Reduced seasonal variability is also apparent in annual cycles with small amplitudes. The results of this study demonstrate the usefulness of studying climate through a simplified energy balance framework, even in a modern computer-intensive field with powerful GCMs.






Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Fri Mar 13 14:23:28 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Fri, 13 Mar 2020 18:23:28 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Jerry Kung, Monday,
 March 23, 2020, 11:00 AM, Online with Zoom see below
Message-ID: <mailman.13199.1584123810.3065.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.


Topic: Thesis Defense
Time: Mar 23, 2020 11:00 AM Eastern Time (US and Canada)

Join Zoom Meeting
https://fsu.zoom.us/j/8981311891

Meeting ID: 898 131 1891




Meteorology Seminar

Jerry Kung

M.S. Meteorology Candidate



Title:  Three modeling approaches to predicting pyrocumulus formation during prescribed burns at eglin air force base, florida

Major Professor:  Dr. Jeffrey Chagnon

Date: Monday, March 23, 2020                        Time: 11:00 AM



Location: On virtual platform - see above for Zoom meeting information



ABSTRACT


Prescribed burning is a land management technique conducted at Eglin Air Force Base (AFB), Florida, by Jackson Guard.  Sometimes a fire-induced cumulus cloud, called a pyrocumulus (pyroCu), forms over a surface fire.  A towering pyrocumulus can lead to downbursts that challenge Jackson Guard teams' capacity to keep fire behavior under control.  There has been scant effort devoted to forecasting pyrocumuli accurately.  This thesis presents three different methods for predicting pyrocumulus formation prior to scheduled burns at Eglin AFB: numerical modeling, statistical regression, and qualitative modeling.  The numerical modeling approach entailed simulating 14 burn dates using the Weather Research and Forecasting (WRF) model's coupled fire-atmosphere module, WRF-Fire.  A Rate-of-Spread (ROS) parameter was developed for simulating the outcomes of future burns, with the prescribed burn model matching observed pyrocumuli at a 71% success rate.  The statistical regression approach used a sample of 31 burn dates to build, train, and test a statistical model using logistic regression.  The statistical model performed with 74% accuracy in hindcasting the sample size's observed outcomes.  In the third approach, a qualitative model was built and tested on the same 31 burn dates' thermodynamic soundings and burn parameters.  The categorization algorithm was converted into a flowchart, with decision points trained to optimally predict the sample's observed outcomes, hindcasting pyrocumulus formation at a 74% success rate.  These approaches to prediction yielded three distinct operational tools for Jackson Guard.  While higher success rates were not obtained this time, a fruitful proof of concept was accomplished.  Furthermore, the three methodological frameworks can all be tailored for fixed-site prescribed burn operations outside northwestern Florida.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Mon Mar 16 09:22:22 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 16 Mar 2020 13:22:22 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Jerry Kung, Monday,
 March 23, 2020, 11:00 AM, Online with Zoom see below
Message-ID: <mailman.13911.1584364943.3065.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.


Topic: Thesis Defense
Time: Mar 23, 2020 11:00 AM Eastern Time (US and Canada)

Join Zoom Meeting
https://fsu.zoom.us/j/8981311891

Meeting ID: 898 131 1891




Meteorology Seminar

Jerry Kung

M.S. Meteorology Candidate



Title:  Three modeling approaches to predicting pyrocumulus formation during prescribed burns at eglin air force base, florida

Major Professor:  Dr. Jeffrey Chagnon

Date: Monday, March 23, 2020                        Time: 11:00 AM



Location: On virtual platform - see above for Zoom meeting information



ABSTRACT


Prescribed burning is a land management technique conducted at Eglin Air Force Base (AFB), Florida, by Jackson Guard.  Sometimes a fire-induced cumulus cloud, called a pyrocumulus (pyroCu), forms over a surface fire.  A towering pyrocumulus can lead to downbursts that challenge Jackson Guard teams' capacity to keep fire behavior under control.  There has been scant effort devoted to forecasting pyrocumuli accurately.  This thesis presents three different methods for predicting pyrocumulus formation prior to scheduled burns at Eglin AFB: numerical modeling, statistical regression, and qualitative modeling.  The numerical modeling approach entailed simulating 14 burn dates using the Weather Research and Forecasting (WRF) model's coupled fire-atmosphere module, WRF-Fire.  A Rate-of-Spread (ROS) parameter was developed for simulating the outcomes of future burns, with the prescribed burn model matching observed pyrocumuli at a 71% success rate.  The statistical regression approach used a sample of 31 burn dates to build, train, and test a statistical model using logistic regression.  The statistical model performed with 74% accuracy in hindcasting the sample size's observed outcomes.  In the third approach, a qualitative model was built and tested on the same 31 burn dates' thermodynamic soundings and burn parameters.  The categorization algorithm was converted into a flowchart, with decision points trained to optimally predict the sample's observed outcomes, hindcasting pyrocumulus formation at a 74% success rate.  These approaches to prediction yielded three distinct operational tools for Jackson Guard.  While higher success rates were not obtained this time, a fruitful proof of concept was accomplished.  Furthermore, the three methodological frameworks can all be tailored for fixed-site prescribed burn operations outside northwestern Florida.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Tue Mar 17 10:55:00 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 17 Mar 2020 14:55:00 +0000
Subject: [Eoas-seminar] Oceanography MS Defense for Lindsay Hooper, Thursday,
 March 26, 12:00 PM via Zoom
Message-ID: <mailman.14628.1584456902.3065.eoas-seminar@lists.fsu.edu>

Join Zoom meeting: https://fsu.zoom.us/j/799226959                                                   Meeting ID: 799-226-959



Oceanography Defense



Lindsay Hooper

M.S. Oceanography Candidate


TITLE: Compliance of Dolphin Ecotours in Southwest Florida to the NOAA Marine Mammal Viewing Guidelines



Major Professor:  Dr. Mariana Fuentes



Date: March 26, 2020                           Time: 12:00 PM



Join Zoom meeting: https://fsu.zoom.us/j/799226959                                                   Meeting ID: 799-226-959





ABSTRACT


To understand ecotour compliance to marine mammal viewing guidelines it is essential to evaluate compliance as a holistic system. This requires not only assessing compliance levels to guidelines, but also assessing captain and passenger knowledge and perceptions of guidelines, as well as how passenger experience is affected by compliance. This is particularly important in areas of thriving ecotourism that have a focus on marine mammals. To address the need for this multi-facet approach to assess compliance, this study 1) assessed ecotour compliance levels to the NOAA Southeast U.S. marine mammal viewing guidelines while interacting with bottlenose dolphins (Tursiops truncatus) in Southwest Florida, 2) evaluated  captain and passenger knowledge and perceptions of the guidelines, 3) explored how passenger experience was affected by compliance. Ecotour compliance was assessed via 16 observations of eight boat-based dolphin ecotours during March - April 2019. Captains' knowledge and opinions of the guidelines, as well as their perceived compliance to the guidelines, were obtained through an online questionnaire distributed after the field observations were completed. Passenger knowledge and perceptions of the guidelines, as well as how compliance affects their experience, were recorded through paper surveys given in person after the ecotour trip in which they took part was over. Of the 12 NOAA viewing guidelines, ecotour captains violated 44% of guidelines on average. Captains generally knew and supported the guidelines, and were aware of their own violations, yet still demonstrated low compliance levels. Passengers also supported the guidelines and valued compliance but did not have enough knowledge about the guidelines to recognize captain violations. Most passengers were willing to pay more for compliant tours, and reported that captains violating the guidelines would negatively affect their trip. Suggestions on possible ways to increase compliance and decrease the potential for negative impacts to the dolphins are made based on our results.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Tue Mar 17 11:04:07 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 17 Mar 2020 15:04:07 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Amanda Sava, Tuesday,
 March 24, 2020, 3:30 PM, EOA 1044 and on Zoom
Message-ID: <mailman.14637.1584457449.3065.eoas-seminar@lists.fsu.edu>

Join Zoom Meeting
https://fsu.zoom.us/j/608220250                                                                             Meeting ID: 608 220 250


Meteorology Seminar

Amanda Sava

Master's Meteorology Candidate



Title:   Unexplained nocturnally forming lightning in the ccafs/ksc area

Major Professor:  Dr. Henry Fuelberg

Date: March 24, 2020                              Time: 3:30 PM



Location: EOA Building room 1044

ABSTRACT


Cape Canaveral Air Force Station and Kennedy Space Center (CCAFS/KSC) experience thunderstorms on an almost daily basis during the warm season (May through September). Most thunderstorms occur during the afternoon and are accurately forecast. However, on rare occasions, thunderstorms form at night with no apparent cause. These unexpected events can catch forecasters off-guard, leading to missed lightning watches and unexpected dangerous situations. The goal of the present research is to address the lack of knowledge about these unexplained nocturnally forming lightning events near CCAFS/KSC and provide forecasters with additional information about the events. The study area is a rectangle centered on the Space Shuttle Roll-Out at KSC and is oriented parallel to Florida's coast. Lightning flash data from the Earth Networks Total Lightning Network (ENTLN) and the National Lightning Detection Network, and radar data from the National Weather Service Melbourne (NWS MLB) were used to identify case nights and null nights, and generate a climatology of case nights. Then, 24 different variables that consider atmospheric moisture, hydrostatic stability, and wind shear were investigated to identify a possible discriminating parameter between case nights and null nights. Results showed that July had the greatest occurrence of case nights, and that the greatest frequency of first flash times was at 0500 UTC, about 5 h after local sunset. The results also revealed that case nights had a slightly greater potential for convection, but unfortunately there was no variable that had a statistically significant difference at the 95% confidence interval between case nights and null nights.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Wed Mar 18 13:41:42 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Wed, 18 Mar 2020 17:41:42 +0000
Subject: [Eoas-seminar] Oceanography PhD Defense for Arvind Shantharam,
 Wednesday, March 25, 2020, 9:00 AM, Love 353 and on Zoom
Message-ID: <mailman.15384.1584553305.3065.eoas-seminar@lists.fsu.edu>

Location: Love Building room 353 and Zoom https://us04web.zoom.us/j/824869147<https://urldefense.com/v3/__https:/us04web.zoom.us/j/824869147__;!!PhOWcWs!g520XnJHeh3VtF6QqSnk-_b9LEDox1ipad7cO2zuZoaNqR0-ZWfhvoRlxGlqv44$>



Oceanography Seminar

Arvind Shantharam

PhD Oceanography Candidate

Title:  SPATIAL AND TEMPORAL PATTERNS OF BENTHIC BIODIVERSITY IN THE GULF OF MEXICO: EMPHASIS ON THE DESOTO CANYON

Major Professor:  Dr. Amy Baco-Taylor

Date:     March 25, 2020                                 Time: 9:00 AM


Location: Love Building room 353 and Zoom https://us04web.zoom.us/j/824869147<https://urldefense.com/v3/__https:/us04web.zoom.us/j/824869147__;!!PhOWcWs!g520XnJHeh3VtF6QqSnk-_b9LEDox1ipad7cO2zuZoaNqR0-ZWfhvoRlxGlqv44$>

ABSTRACT

Despite being a known benthic biological hotspot and environmental ecotone, the DeSoto Canyon has hardly been characterized for its benthic diversity and community structure. Moreover, it is a known deposition and impact zone due to hydrocarbon pollution from the Deepwater Horizon (DwH). As part of a project to evaluate the impact of the DwH blowout and characterize the ecological patterns throughout, both spatially and temporally, macrofauna (seafloor-inhabiting organisms ? 300 ?m) were sampled within the canyon and on the adjacent slope. Five stations within the canyon, from 2012 ? 2014, and from two stations between 2013 ? 2014 on the adjacent open slope, were used for analysis of interannual dynamics, and temporal variability in the face of the DwH. Elevated abundance was observed at the start of the time-series for overall macrofauna and deposit feeder abundance. However, diversity metrics showed no difference within stations among timepoints.  Community and feeding guild structure varied by station, as expected, but showed no statistical difference among time points within a station. Cluster analyses for these two metrics showed grouping more by station than by time point, but some temporal variability was noted in temporal trajectory overlays. Metrics designed for measuring oil contamination impact and overall community stress including the benthic polychaete/amphipod ratio, feeding guild abundance, macrofaunal indicators designed from the DwH, and community dispersion, generally exhibited a paucity of evidence of impact, both yearly and with site-to-site comparisons. This suggests low to moderate levels of impact in the canyon consistent with the low deposition of hydrocarbons, timing of sampling, and quick recovery of canyon foraminifera. Taken together these results suggest relatively low levels of temporal variability within the DeSoto Canyon, with little evidence of the influence of oil on these sites within the studied time range.
Macrofauna from 13 stations along the canyon wall and axis, and on the adjacent slope, were sampled along with sediment, terrain, and water mass parameters. Within the canyon, abundance and species richness decreased with depth, while evenness increased. Cluster analysis identified three depth-related groups within the canyon that conformed to previously established bathymetric boundaries: stations at 464 ? 485 m, 669 ? 1834 m, and > 2000 m. Abundance differed between depth groups. Species richness was lowest for the deepest group and evenness was lowest for the shallowest. Community structure within the canyon most related to fluorometry and oxygen saturation, combined with any of salinity, particulate organic carbon, sediment organic carbon, or slope.
Canyon wall abundances were higher than the canyon axis or adjacent slope. Community structure differed between all three habitat types. Ordination of community structure suggests a longitudinal pattern that potentially tracks with increasing sea-surface chlorophyll that occurs in the eastward direction across the northern GOM. Canyon and slope differences may result from seasonal water masses entrained by canyon topography characterized by high salinity, oxygen saturation, fluorometry, and turbidity. Higher fluorescence and turbidity in the canyon did not translate into higher sediment organic matter. Flushing along canyon wall channels and the canyon axis may explain the low organic matter. Differences in abundance and structure between the canyon wall and axis may result from microhabitat heterogeneity due to potential hydrocarbon seepage, organically enriched sediment deposits along channels, or remnant influence from the DwH blowout.
The Biodiversity of the Gulf of Mexico (BioGoMx) database, which contains occurrence information of extant species in the GOM, allows for the analysis of benthic mollusc diversity and distribution across the entire basin. For analyses, the GOM was split in 4 geographic sectors (NE, NW, SE, and SW) and 6 depth classes (inshore, upper shelf, lower shelf, upper slope, lower slope, and abyssal plain) for a total of 24 geographic-depth polygons. The northern GOM contained higher species richness than the south, the east more than the west. Species richness decreased with depth with maxima occurring on the upper shelf. Bivalves and gastropods dominated each geographic sector and depth class, together comprising >90% of the molluscan species richness. Assemblages were structured by depth more than by geographic sector. GOM molluscs fell into 3 broad depth-based assemblages: the inshore and continental shelf, the continental slope, and the abyssal plain species combined with the western lower slope. Geographically, taxonomic distinctness analysis indicated most NE depths fell below average distinctness and by depth polygons above and below the continental shelf break were frequently distinct. Cluster analysis based on taxonomic dissimilarity agreed with the analyses based on the species occurrence data. Mollusc feeding strategies largely followed estimated proportions for the larger Atlantic. Carnivory and suspension feeding were the most common with grazing, herbivory, and parasitism following behind. Chemosymbiotic species were also prevalent due to the widespread occurrence of cold seep habitats. Further taxonomic research and more sampling are needed to determine patterns at finer scales.sis based on taxonomic dissimilarity agreed with the analyses based on the species occurrence data. Mollusc feeding strategies largely followed estimated proportions for the larger Atlantic. Carnivory and suspension feeding were the most common with grazing, herbivory, and parasitism following behind. Chemosymbiotic species were also prevalent due to the widespread occurrence of cold seep habitats. Further taxonomic research and more sampling are needed to determine patterns at finer scales.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 19 08:48:51 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 19 Mar 2020 12:48:51 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Jonathan Christophersen,
 Thursday, March 26, 2020, 3:30 PM,
 Zoom meeting ID: https://fsu.zoom.us/j/6234926316
Message-ID: <mailman.15743.1584622134.3065.eoas-seminar@lists.fsu.edu>

Zoom Meeting ID: https://fsu.zoom.us/j/6234926316<https://urldefense.com/v3/__https:/fsu.zoom.us/j/6234926316__;!!PhOWcWs!ntfOrep-8rtYp2jv7sPFDzC-_1sXWsteFFrhpVaw2nRZkEh6V2m7ujr6f-jm1q0$>

Meteorology Seminar

Jonathan Christophersen

PhD Meteorology Candidate



Title:  Observational analysis of atmospheric and oceanic diurnal cycles in the tropical Atlantic

Major Professor:  Dr. Philip Sura

Date: Thursday March 26, 2020                                   Time: 3:30 PM


Location: Zoom Meeting ID: https://fsu.zoom.us/j/6234926316<https://urldefense.com/v3/__https:/fsu.zoom.us/j/6234926316__;!!PhOWcWs!ntfOrep-8rtYp2jv7sPFDzC-_1sXWsteFFrhpVaw2nRZkEh6V2m7ujr6f-jm1q0$>


ABSTRACT
Interactions between the lower atmosphere and upper ocean on diurnal time scales are assessed in the tropical Atlantic Ocean by combining over 20 years of observations from the Prediction and Research Moored Array in the Tropical Atlantic (PIRATA) with reanalysis, satellite, and model data. In the first section of this study, analysis of surface winds and pressure from PIRATA moorings along 23oW reveals semi-diurnal patterns in the 10-meter zonal wind anomalies and a diurnal pattern in the 10-meter meridional wind anomalies. Past research on the diurnal and semi-diurnal wind patterns observed in the tropical Pacific concluded that the zonal semi-diurnal wind patterns are consistent with migrating atmospheric thermal tidal (ATT) forcing. However, causes of the diurnal cycle in the meridional winds remains elusive. This work extends the past analysis in the tropical Pacific to show how the nonmigrating ATT drives the diurnal cycle of the meridional winds and how that leads to an offshore early morning precipitation maximum during the boreal summer in the tropical Atlantic basin.

Secondly, data from the Tropical Atlantic Current Observation Study (TACOS) at 4oN, 23oW is analyzed to better understand air-sea coupling in the equatorial Atlantic Ocean on short time scales. This particular PIRATA mooring offers high-temporal resolution (10 minute - 1 hour) wind, current, temperature, and salinity data from 2017 to the present. Equipped with 11 current sensors, this site uniquely resolves the diurnal cycle of vertical shear. Throughout the first deployment of the TACOS mooring (March 2017 - March 2018), the presence of a shear-variance layer was observed. Spectral analysis confirms that significant oscillations in the seasonal thermocline, due to the passage of internal tides, modulate the velocity field, altering the shear. During those times that experienced high diurnal SST amplitudes, the deepening nocturnal mixed layer interacts with the shear-variance reservoir, thereby enhancing marginal instability.

Upper-ocean processes are then compared between the PIRATA/TACOS observations and the Nucleus for European Modelling of the Ocean (NEMO) model in the last part of this study. Similarities and discrepancies in mixing processes, static stability, upper-ocean currents as a response to wind forcing, and other air-sea components are discussed. Discrepancies between the dynamic and thermohaline fields persist throughout the record of the analysis time period, thereby contributing to differences in the stratification and shear, resulting in the model being "over mixed".



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 19 08:55:02 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 19 Mar 2020 12:55:02 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Robert West, Thursday,
 April 2, 2020, 3:30 PM,
 Love 353 and Zoom meeting ID: https://fsu.zoom.us/j/657801371
Message-ID: <mailman.15753.1584622504.3065.eoas-seminar@lists.fsu.edu>

Join Zoom Meeting          https://fsu.zoom.us/j/657801371



Meteorology Seminar

Robert West

PhD Meteorology Candidate



Title:  An evaluation of non-Gaussian climate statistics

Major Professor:  Dr. Philip Sura

Date: Thursday April 2, 2020                             Time: 3:30 PM


Location: Werner A. Baum Seminar Room (353 Love Building) and Zoom meeting ID: https://fsu.zoom.us/j/657801371



ABSTRACT

Earth's atmosphere-ocean system is distinguished by its variability over a wide range of time scales. The non-linear interactions between these time scales are complex and are further complicated by the large number of subsystems and modes in the atmosphere-ocean system. Here, we explore a stochastic model developed by Sardeshmukh and Sura which uses correlated additive and multiplicative (CAM) noise and relies on a state-dependent (multiplicative) noise forcing to represent the multi-scale interactions between weather and climate.

An important problem in climate variability is the statistical representation of extreme weather and climate events. While a description of the tails of a probability density function (pdf) is essential for modeling extreme events, an understanding of the full pdf is required to capture the full dynamics of the atmosphere-ocean system. On daily scales, the statistics of the large-scale atmospheric circulation are non-Gaussian. A one-dimensional pdf produced by the CAM noise model, or stochastically generated skewed (SGS) distribution, attempts to probabilistically represent the non-Gaussian statistics of atmospheric climate anomalies.

This study evaluates the ability of the SGS distribution to represent the of non-Gaussian statistics of several atmospheric variables using NOAA-CIRES-DOE Twentieth Century Reanalysis Project version 2c (20CRv2c) dataset. A method of moments SGS parameter estimation technique described Sardeshmukh et al (2015) is implemented in a Julia software package and applied to global gridded time series of reanalysis data. Goodness-of-fit tests show the SGS distribution performs well in regions of near-zero and positive kurtosis, but produces statistically implausible with time series with negative sample kurtosis. However, the SGS distribution is found to outperform the standard normal (Gaussian) distribution at nearly all gridded locations, even where the SGS fit is poor. The SGS distributions of two 67 year 20CRv2c periods are also compared, where few significant changes in the shape of the SGS distribution are found.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 19 10:04:06 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 19 Mar 2020 14:04:06 +0000
Subject: [Eoas-seminar] FW: Zoom defenses
In-Reply-To: <854516DF-B194-4970-B07D-3473A173DDE1@my.fsu.edu>
References: <854516DF-B194-4970-B07D-3473A173DDE1@my.fsu.edu>
Message-ID: <mailman.15811.1584626648.3065.eoas-seminar@lists.fsu.edu>

Good morning,

Attached are some very helpful tips on conducting defenses remotely. Please review if you will be defending or attending a defense remotely.  Thank you Catherine for this helpful information.

Shel

From: Catherine Stauffer <cls14b at my.fsu.edu>
Sent: Thursday, March 19, 2020 9:45 AM
To: Shel McGuire <smcguire at fsu.edu>
Subject: Zoom defenses

Hey Shel,

I transcribed a twitter thread from a recent UF remote PhD defense (link is in the document) with a lot of really useful tips for the presenter, the committee, and the audience. I think it?d be something really beneficial to be distributed to the eoas email chains/the defendees/whomever it is also applicable, ie external committee members/the whole university?

Catherine


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From eoas-seminar at lists.fsu.edu  Thu Mar 19 10:38:27 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 19 Mar 2020 14:38:27 +0000
Subject: [Eoas-seminar] Zoom defenses
In-Reply-To: <mailman.15811.1584626648.3065.eoas-seminar@lists.fsu.edu>
References: <854516DF-B194-4970-B07D-3473A173DDE1@my.fsu.edu>,
 <mailman.15811.1584626648.3065.eoas-seminar@lists.fsu.edu>
Message-ID: <mailman.15837.1584628709.3065.eoas-seminar@lists.fsu.edu>

Good morning Shel,

thanks for sending this helpful information,
Markus


Markus Huettel
Department of Earth, Ocean and Atmospheric Science
Florida State University
117 N Woodward Ave.
P.O. Box 3064320
Tallahassee, Florida 32306-4320
USA

Phone: (850) 645-1394
Fax: (850) 644-2581
Email:  mhuettel at fsu.edu
Website: http://myweb.fsu.edu/mhuettel/


________________________________________
From: Eoas-seminar <eoas-seminar-bounces at lists.fsu.edu> on behalf of eoas-seminar--- via Eoas-seminar <eoas-seminar at lists.fsu.edu>
Sent: Thursday, March 19, 2020 10:04 AM
To: eoas-seminar at lists.fsu.edu
Subject: [Eoas-seminar] FW: Zoom defenses

Good morning,

Attached are some very helpful tips on conducting defenses remotely. Please review if you will be defending or attending a defense remotely.  Thank you Catherine for this helpful information.

Shel

From: Catherine Stauffer <cls14b at my.fsu.edu>
Sent: Thursday, March 19, 2020 9:45 AM
To: Shel McGuire <smcguire at fsu.edu>
Subject: Zoom defenses

Hey Shel,

I transcribed a twitter thread from a recent UF remote PhD defense (link is in the document) with a lot of really useful tips for the presenter, the committee, and the audience. I think it?d be something really beneficial to be distributed to the eoas email chains/the defendees/whomever it is also applicable, ie external committee members/the whole university?

Catherine





From eoas-seminar at lists.fsu.edu  Thu Mar 19 12:47:28 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 19 Mar 2020 16:47:28 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for William Curtis, Monday,
 March 30, 2020, 3:30 PM, Love 353 and on Zoom
Message-ID: <mailman.15895.1584636450.3065.eoas-seminar@lists.fsu.edu>

Zoom meeting URL: https://fsu.zoom.us/j/374872825<https://urldefense.com/v3/__https:/fsu.zoom.us/j/374872825__;!!PhOWcWs!nGBa02kLUR6eH2JGYAk3PDUeElPZ-Bog-lPRVYQDn1hhsibx2TSCIxhv7RlAiVQ$>

Meteorology Seminar

William Curtis

M.S. Meteorology Candidate



Title:  Electric Potential Gradient Behavior under Shallow Cumulus Clouds Using Electric Field Mills and Cumulus Cloud Top Vertical Growth at Kennedy Space Center and Cape Canaveral Air Force Station

Major Professor:  Dr. Henry Fuelberg

Date: Monday, March 30, 2020                        Time: 3:30 PM



Location: Werner A. Baum Seminar Room (353 Love Building) and Zoom meeting URL: https://fsu.zoom.us/j/374872825<https://urldefense.com/v3/__https:/fsu.zoom.us/j/374872825__;!!PhOWcWs!nGBa02kLUR6eH2JGYAk3PDUeElPZ-Bog-lPRVYQDn1hhsibx2TSCIxhv7RlAiVQ$>


ABSTRACT


Kennedy Space Center (KSC) at the Cape Canaveral Air Force Station (CCAFS) launches spacecraft for NASA and private companies throughout the year. Since spacecraft are expensive to build and launch, a complicated set of guidelines has been developed to ensure their safety. The Lightning Launch Commit Criteria (LLCC) of the guidelines pertain to natural lightning and spacecraft triggered lightning. This research has investigated the Cumulus Cloud Rule, the most commonly violated component of the LLCC.  Using the network of field mills at KSC (the Launch Pad Lightning Warning System (LPLWS), fields of electric potential gradient (PG) are analyzed near cumulus clouds.

          This study focuses on cumulus having cloud top temperatures (CTT) between +5?C to -20?C. Each cloud of the dataset must be independent from nearby clouds, cannot be part of other convective systems, and must be located within the field mill network. The clouds are found using data from the TDR 43-250 weather radar at KSC/CCAFS. Thermodynamic profiles are obtained using radiosonde data from the KSC/CCAFS site (KXMR). Hydrometeor type is determined using a hydrometeor classification algorithm (HCA). The clouds are selected during Florida's warm season months, May through September.
            CTT is an important aspect of the Cumulus Cloud Rule of the LLCC since values specify an ascending vehicle's stand-off distance from the cloud. Colder CTTs require greater separation. However, present results show that PG versus distance is not directly related to CTT. For example, colder CTTs did not lead always to greater PG or PG values farther outside the fair field range. Results also reveal that cloud growth rates during the early stages of development vary. Inversions cause slow growth followed by rapid growth of the cloud. The median cloud growth from a warmer CTT (+5?C) to a colder CTT (0?C) was found to be less than 5 min, which translates to a median cloud growth speed between 10 to 15 ft s-1.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 19 13:08:24 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 19 Mar 2020 17:08:24 +0000
Subject: [Eoas-seminar] Oceanography PhD Defense for Bryan Keller,
 Thursday April 2, 2020, 1:30 PM by Zoom 328373041
Message-ID: <mailman.15914.1584637706.3065.eoas-seminar@lists.fsu.edu>

Join Zoom Meeting          :  https://fsu.zoom.us/j/328373041



Oceanography Seminar

Bryan Keller

PhD Oceanography Candidate



TITLE: THE SPATIAL ECOLOGY OF THE BONNETHEAD, SPHYRNA TIBURO:  MIGRATION, PARTURITION AND MAGNETIC-BASED NAVIGATION

Major Professor:  Dr. Dean Grubbs



Date: Thursday April 2, 2020                             Time: 1:30 PM



Location: Zoom meeting ID:  https://fsu.zoom.us/j/328373041





ABSTRACT



Elasmobranch fishes are a highly vagile group that often cross state, regional or international boundaries. Delineating migratory patterns that cross jurisdictional boundaries is essential for effective management, especially when confronted with fishing pressures that vary over space and time. In addition to migrating individuals, studying critical life stages, such as neonates, is important for fisheries management. These neonates can be essential for recruitment to adult populations and proper management should be a priority.

We used passive acoustic telemetry to track the migrations of 44 bonnetheads, Sphyrna tiburo, a widely distributed small coastal shark in the western hemisphere. We monitored individuals for up to 1506 days across ~ 1070 km of Southeastern United States Atlantic coastline. The majority of these sharks exhibited strong site fidelity to the North Edisto River in South Carolina and returned annually, residing in the estuary from April to November. Climatic migrations then occurred and overwintering habitats were located throughout Georgia and mid-Florida waters. We present, for the first time to our knowledge, the interannual effects of climatic variation on the seasonal migrations of individual sharks. We found that interannual variations in sea surface temperature had significant effects on the migration distance, duration, and date of arrival to overwintering habitats of individual sharks. An electivity analysis suggested that overwintering locations are selected based upon thermal range and not physical location. Given the significant effects of sea surface temperature on migration, future migrations may be altered due to climate change and warming seas. The effect of shorter migrations or the overwintering presence of S. tiburo in more northerly habitats is unknown. Given the degree of site fidelity observed, our work also has robust implications for the management of this species, as animals with strong ties to specific locations are put at high risks of localized extirpation. The data generated from this study can be used to generate predictive models that can estimate migration/overwintering areas based upon sea surface temperature. These areas can then be protected during migration should the stock become imperiled.

While monitoring the residency of S. tiburo in the North Edisto River we noticed a repeated absence of acoustic detections that aligned with the temporal span when parturition occurs. This absence from the NER suggested they may be giving birth outside of the estuarine waters. We used acoustic telemetry to track pregnant females and found they left the NER for ~2 weeks every year. During this time they underwent a gametic migration down the coast of the United States into the coastal waters of southern South Carolina and Georgia. We also analyzed fishery independent surveys and found neonates began to appear in nearshore trawls during this same time period. The mature females caught in these surveys also lost ~1 kg of total body weight from summer to early fall, which we suspect indicates a birthing event. A separate study on the same population of sharks identified that bonnetheads captured in mid-September were post-partum. Collectively these data illustrate that bonnetheads emigrate from the NER while pregnant, migrate down the coast, give birth and return to the NER where they stay until early November. These data are important for the management of the bonnethead because their primary source of mortality is the shrimp fishery, which has heavy spatial overlap in these nearshore waters, and a recent stock assessment suggested these trawlers could be contributing to heavy pressure on the bonnethead.

Throughout the first two research chapters, we have identified that migration is common in marine animals. Bonnetheads from the North Edisto River were shown to migrate over 1,000 km and successfully return to a target location. In order for these movements to be possible, having a map sense may be important, and the earth's magnetic field appears to be an important component of this behavior for other taxa.  Whilst sharks have been at the forefront of sensory physiology research on sensitivity to electromagnetic fields, whether they use Earth's magnetic field for navigation is controversial. Here we use a "magnetic displacement" experiment to show that sharks can use the map-like information from earth's magnetic field to orient. Bonnethead sharks captured along the panhandle of Florida and exposed to a southern field within their range in the Gulf of Mexico oriented homeward, whereas orientation was random when exposed to a northern field outside of their range (in the continental U.S.A.) and in a field that controlled for nonspecific effects of the testing procedure. Given that sharks could have experienced more southern magnetic fields than the test site, but never more northern fields, our findings are consistent with the hypothesis that sharks learn magnetic features for navigational tasks. The apparent ability of sharks to discriminate position using magnetic cues may also explain the sensory basis by which genetic structure of shark populations are maintained and how cryptic speciation can occur - despite no geographic barriers among reproductive locations.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Mon Mar 23 08:58:27 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 23 Mar 2020 12:58:27 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Jerry Kung, Monday,
 March 23, 2020, 11:00 AM, Online with Zoom see below
Message-ID: <mailman.17491.1584968310.3065.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.


Topic: Thesis Defense
Time: Mar 23, 2020 11:00 AM Eastern Time (US and Canada)

Join Zoom Meeting
https://fsu.zoom.us/j/8981311891

Meeting ID: 898 131 1891




Meteorology Seminar

Jerry Kung

M.S. Meteorology Candidate



Title:  Three modeling approaches to predicting pyrocumulus formation during prescribed burns at eglin air force base, florida

Major Professor:  Dr. Jeffrey Chagnon

Date: Monday, March 23, 2020                        Time: 11:00 AM



Location: On virtual platform - see above for Zoom meeting information



ABSTRACT


Prescribed burning is a land management technique conducted at Eglin Air Force Base (AFB), Florida, by Jackson Guard.  Sometimes a fire-induced cumulus cloud, called a pyrocumulus (pyroCu), forms over a surface fire.  A towering pyrocumulus can lead to downbursts that challenge Jackson Guard teams' capacity to keep fire behavior under control.  There has been scant effort devoted to forecasting pyrocumuli accurately.  This thesis presents three different methods for predicting pyrocumulus formation prior to scheduled burns at Eglin AFB: numerical modeling, statistical regression, and qualitative modeling.  The numerical modeling approach entailed simulating 14 burn dates using the Weather Research and Forecasting (WRF) model's coupled fire-atmosphere module, WRF-Fire.  A Rate-of-Spread (ROS) parameter was developed for simulating the outcomes of future burns, with the prescribed burn model matching observed pyrocumuli at a 71% success rate.  The statistical regression approach used a sample of 31 burn dates to build, train, and test a statistical model using logistic regression.  The statistical model performed with 74% accuracy in hindcasting the sample size's observed outcomes.  In the third approach, a qualitative model was built and tested on the same 31 burn dates' thermodynamic soundings and burn parameters.  The categorization algorithm was converted into a flowchart, with decision points trained to optimally predict the sample's observed outcomes, hindcasting pyrocumulus formation at a 74% success rate.  These approaches to prediction yielded three distinct operational tools for Jackson Guard.  While higher success rates were not obtained this time, a fruitful proof of concept was accomplished.  Furthermore, the three methodological frameworks can all be tailored for fixed-site prescribed burn operations outside northwestern Florida.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Mon Mar 23 11:00:03 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 23 Mar 2020 15:00:03 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for William Curtis, Monday,
 March 30, 2020, 3:30 PM, Zoom only
Message-ID: <mailman.17647.1584975605.3065.eoas-seminar@lists.fsu.edu>

Zoom meeting URL: https://fsu.zoom.us/j/374872825<https://urldefense.com/v3/__https:/fsu.zoom.us/j/374872825__;!!PhOWcWs!nGBa02kLUR6eH2JGYAk3PDUeElPZ-Bog-lPRVYQDn1hhsibx2TSCIxhv7RlAiVQ$>

Meteorology Seminar

William Curtis

M.S. Meteorology Candidate



Title:  Electric Potential Gradient Behavior under Shallow Cumulus Clouds Using Electric Field Mills and Cumulus Cloud Top Vertical Growth at Kennedy Space Center and Cape Canaveral Air Force Station

Major Professor:  Dr. Henry Fuelberg

Date: Monday, March 30, 2020                        Time: 3:30 PM



Location: Zoom meeting URL: https://fsu.zoom.us/j/374872825<https://urldefense.com/v3/__https:/fsu.zoom.us/j/374872825__;!!PhOWcWs!nGBa02kLUR6eH2JGYAk3PDUeElPZ-Bog-lPRVYQDn1hhsibx2TSCIxhv7RlAiVQ$>


ABSTRACT


Kennedy Space Center (KSC) at the Cape Canaveral Air Force Station (CCAFS) launches spacecraft for NASA and private companies throughout the year. Since spacecraft are expensive to build and launch, a complicated set of guidelines has been developed to ensure their safety. The Lightning Launch Commit Criteria (LLCC) of the guidelines pertain to natural lightning and spacecraft triggered lightning. This research has investigated the Cumulus Cloud Rule, the most commonly violated component of the LLCC.  Using the network of field mills at KSC (the Launch Pad Lightning Warning System (LPLWS), fields of electric potential gradient (PG) are analyzed near cumulus clouds.

          This study focuses on cumulus having cloud top temperatures (CTT) between +5?C to -20?C. Each cloud of the dataset must be independent from nearby clouds, cannot be part of other convective systems, and must be located within the field mill network. The clouds are found using data from the TDR 43-250 weather radar at KSC/CCAFS. Thermodynamic profiles are obtained using radiosonde data from the KSC/CCAFS site (KXMR). Hydrometeor type is determined using a hydrometeor classification algorithm (HCA). The clouds are selected during Florida's warm season months, May through September.
            CTT is an important aspect of the Cumulus Cloud Rule of the LLCC since values specify an ascending vehicle's stand-off distance from the cloud. Colder CTTs require greater separation. However, present results show that PG versus distance is not directly related to CTT. For example, colder CTTs did not lead always to greater PG or PG values farther outside the fair field range. Results also reveal that cloud growth rates during the early stages of development vary. Inversions cause slow growth followed by rapid growth of the cloud. The median cloud growth from a warmer CTT (+5?C) to a colder CTT (0?C) was found to be less than 5 min, which translates to a median cloud growth speed between 10 to 15 ft s-1.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Mon Mar 23 13:35:12 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 23 Mar 2020 17:35:12 +0000
Subject: [Eoas-seminar] Oceanography Thesis Defense - Alexa Putillo - Mar 30,
 10am - Zoom Meeting
Message-ID: <mailman.17818.1584984921.3065.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.



Topic: Masters Defense

Time: Mar 30, 2020 10:00 AM Eastern Time (US and Canada)



Join Zoom Meeting

Join URL: https://fsu.zoom.us/j/458653834<https://urldefense.com/v3/__https:/fsu.zoom.us/j/458653834__;!!Epnw_ITfSMW4!7d4wvOCyXQdslpkhXYwusnrvx20hF1Tt79m_kkNVuuYO0gYJQpmVfKw5V27gAZO44Q$>



Meeting ID: 458-653-834





Oceanography Defense



Alexa Putillo

M.S. Environmental Sciences Candidate



Title:  Influence of diet on blood biochemistry profiles in juvenile green turtles (Chelonia mydas)

Major Professor:  Dr. Mariana Fuentes



Date: Monday, March 30, 2020                        Time: 10:00 AM



Location: On virtual platform - see above for Zoom meeting information



ABSTRACT
Blood biochemistry profiles aid health assessment of marine turtles but knowledge of the influence of regional biological factors (e.g. habitat, diet) on marine turtle blood analyte values is limited. To investigate the influence of diet on blood chemistry values in juvenile green turtles (Chelonia mydas) we used carbon and nitrogen stable isotopes to provide a quantitative estimate of forage item proportions in green turtles feeding at two distinct areas (Bonefish Hole and South Flats) in Bimini, Bahamas. Blood samples were obtained from 13 turtles in Bonefish Hole (a mangrove tidal estuary) and 15 turtles in South Flats (an open water seagrass bed) in 2018. Sessile filter feeders contributed the largest proportion of diet in Bonefish Hole and seagrass contributed the highest proportion of diet in South Flats. Turtles at Bonefish Hole presented significantly lower cholesterol, total protein, phosphorus, triglycerides, and aspartate transaminase compared to South Flats. Across all turtles, those feeding primarily on red algae presented the highest uric acid and alkaline phosphatase and turtles with a seagrass-dominated diet had the highest cholesterol. Understanding dietary influence on blood biochemistry is a priority for green turtle conservation because it will help inform health and nutritional evaluations, and the trends reported can aid the interpretation of blood analyte values in marine turtle populations worldwide.


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From eoas-seminar at lists.fsu.edu  Tue Mar 24 08:57:48 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 24 Mar 2020 12:57:48 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for Amanda Sava, Tuesday,
 March 24, 2020, 3:30 PM, Zoom only
Message-ID: <mailman.109.1585054670.81223.eoas-seminar@lists.fsu.edu>

Join Zoom Meeting
https://fsu.zoom.us/j/608220250                                                                 Meeting ID: 608 220 250


Meteorology Seminar

Amanda Sava

Master's Meteorology Candidate



Title:   Unexplained nocturnally forming lightning in the ccafs/ksc area

Major Professor:  Dr. Henry Fuelberg

Date: March 24, 2020                              Time: 3:30 PM



Location: Zoom Meeting ID: 608 220 250

ABSTRACT


Cape Canaveral Air Force Station and Kennedy Space Center (CCAFS/KSC) experience thunderstorms on an almost daily basis during the warm season (May through September). Most thunderstorms occur during the afternoon and are accurately forecast. However, on rare occasions, thunderstorms form at night with no apparent cause. These unexpected events can catch forecasters off-guard, leading to missed lightning watches and unexpected dangerous situations. The goal of the present research is to address the lack of knowledge about these unexplained nocturnally forming lightning events near CCAFS/KSC and provide forecasters with additional information about the events. The study area is a rectangle centered on the Space Shuttle Roll-Out at KSC and is oriented parallel to Florida's coast. Lightning flash data from the Earth Networks Total Lightning Network (ENTLN) and the National Lightning Detection Network, and radar data from the National Weather Service Melbourne (NWS MLB) were used to identify case nights and null nights, and generate a climatology of case nights. Then, 24 different variables that consider atmospheric moisture, hydrostatic stability, and wind shear were investigated to identify a possible discriminating parameter between case nights and null nights. Results showed that July had the greatest occurrence of case nights, and that the greatest frequency of first flash times was at 0500 UTC, about 5 h after local sunset. The results also revealed that case nights had a slightly greater potential for convection, but unfortunately there was no variable that had a statistically significant difference at the 95% confidence interval between case nights and null nights.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Tue Mar 24 11:58:21 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 24 Mar 2020 15:58:21 +0000
Subject: [Eoas-seminar] Oceanography Dissertation Defense - Arvind
 Shantharam - Mar 25, 9am - Zoom meeting
Message-ID: <mailman.242.1585065503.81223.eoas-seminar@lists.fsu.edu>

Location: Zoom ONLY https://fsu.zoom.us/j/878209172

Oceanography Seminar

Arvind Shantharam

PhD Oceanography Candidate

Title: SPATIAL AND TEMPORAL PATTERNS OF BENTHIC BIODIVERSITY IN THE GULF OF MEXICO: EMPHASIS ON THE DESOTO CANYON

Major Professor: Dr. Amy Baco-Taylor

Date:  March 25, 2020                                 Time: 9:00 AM


Location: Zoom https://fsu.zoom.us/j/878209172

ABSTRACT

Despite being a known benthic biological hotspot and environmental ecotone, the DeSoto Canyon has hardly been characterized for its benthic diversity and community structure. Moreover, it is a known deposition and impact zone due to hydrocarbon pollution from the Deepwater Horizon (DwH). As part of a project to evaluate the impact of the DwH blowout and characterize the ecological patterns throughout, both spatially and temporally, macrofauna (seafloor-inhabiting organisms ? 300 ?m) were sampled within the canyon and on the adjacent slope. Five stations within the canyon, from 2012 ? 2014, and from two stations between 2013 ? 2014 on the adjacent open slope, were used for analysis of interannual dynamics, and temporal variability in the face of the DwH. Elevated abundance was observed at the start of the time-series for overall macrofauna and deposit feeder abundance. However, diversity metrics showed no difference within stations among timepoints.  Community and feeding guild structure varied by station, as expected, but showed no statistical difference among time points within a station. Cluster analyses for these two metrics showed grouping more by station than by time point, but some temporal variability was noted in temporal trajectory overlays. Metrics designed for measuring oil contamination impact and overall community stress including the benthic polychaete/amphipod ratio, feeding guild abundance, macrofaunal indicators designed from the DwH, and community dispersion, generally exhibited a paucity of evidence of impact, both yearly and with site-to-site comparisons. This suggests low to moderate levels of impact in the canyon consistent with the low deposition of hydrocarbons, timing of sampling, and quick recovery of canyon foraminifera. Taken together these results suggest relatively low levels of temporal variability within the DeSoto Canyon, with little evidence of the influence of oil on these sites within the studied time range.
Macrofauna from 13 stations along the canyon wall and axis, and on the adjacent slope, were sampled along with sediment, terrain, and water mass parameters. Within the canyon, abundance and species richness decreased with depth, while evenness increased. Cluster analysis identified three depth-related groups within the canyon that conformed to previously established bathymetric boundaries: stations at 464 ? 485 m, 669 ? 1834 m, and > 2000 m. Abundance differed between depth groups. Species richness was lowest for the deepest group and evenness was lowest for the shallowest. Community structure within the canyon most related to fluorometry and oxygen saturation, combined with any of salinity, particulate organic carbon, sediment organic carbon, or slope.
Canyon wall abundances were higher than the canyon axis or adjacent slope. Community structure differed between all three habitat types. Ordination of community structure suggests a longitudinal pattern that potentially tracks with increasing sea-surface chlorophyll that occurs in the eastward direction across the northern GOM. Canyon and slope differences may result from seasonal water masses entrained by canyon topography characterized by high salinity, oxygen saturation, fluorometry, and turbidity. Higher fluorescence and turbidity in the canyon did not translate into higher sediment organic matter. Flushing along canyon wall channels and the canyon axis may explain the low organic matter. Differences in abundance and structure between the canyon wall and axis may result from microhabitat heterogeneity due to potential hydrocarbon seepage, organically enriched sediment deposits along channels, or remnant influence from the DwH blowout.
The Biodiversity of the Gulf of Mexico (BioGoMx) database, which contains occurrence information of extant species in the GOM, allows for the analysis of benthic mollusc diversity and distribution across the entire basin. For analyses, the GOM was split in 4 geographic sectors (NE, NW, SE, and SW) and 6 depth classes (inshore, upper shelf, lower shelf, upper slope, lower slope, and abyssal plain) for a total of 24 geographic-depth polygons. The northern GOM contained higher species richness than the south, the east more than the west. Species richness decreased with depth with maxima occurring on the upper shelf. Bivalves and gastropods dominated each geographic sector and depth class, together comprising >90% of the molluscan species richness. Assemblages were structured by depth more than by geographic sector. GOM molluscs fell into 3 broad depth-based assemblages: the inshore and continental shelf, the continental slope, and the abyssal plain species combined with the western lower slope. Geographically, taxonomic distinctness analysis indicated most NE depths fell below average distinctness and by depth polygons above and below the continental shelf break were frequently distinct. Cluster analysis based on taxonomic dissimilarity agreed with the analyses based on the species occurrence data. Mollusc feeding strategies largely followed estimated proportions for the larger Atlantic. Carnivory and suspension feeding were the most common with grazing, herbivory, and parasitism following behind. Chemosymbiotic species were also prevalent due to the widespread occurrence of cold seep habitats. Further taxonomic research and more sampling are needed to determine patterns at finer scales.sis based on taxonomic dissimilarity agreed with the analyses based on the species occurrence data. Mollusc feeding strategies largely followed estimated proportions for the larger Atlantic. Carnivory and suspension feeding were the most common with grazing, herbivory, and parasitism following behind. Chemosymbiotic species were also prevalent due to the widespread occurrence of cold seep habitats. Further taxonomic research and more sampling are needed to determine patterns at finer scales.


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From eoas-seminar at lists.fsu.edu  Thu Mar 26 08:49:16 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 26 Mar 2020 12:49:16 +0000
Subject: [Eoas-seminar] Geology Thesis Defense - Kyle Compare - April 8,
 10:30 - Zoom meeting
Message-ID: <mailman.1450.1585226958.81223.eoas-seminar@lists.fsu.edu>

Title: Development and testing of an automated, in-situ groundwater seepage meter
Major Professor: Ming Ye

Online through Zoom https://fsu.zoom.us/j/83665175<https://urldefense.com/v3/__https:/fsu.zoom.us/j/83665175__;!!PhOWcWs!kvHdHiOs2ncqJ-rQ9-5i1-HMClbxlslmrYa9LurWn-vEU2wkibdfq6xNvdyaGOQ$>


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From eoas-seminar at lists.fsu.edu  Thu Mar 26 09:37:41 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 26 Mar 2020 13:37:41 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Jonathan Christophersen,
 Thursday, March 26, 2020, 3:30 PM,
 Zoom meeting ID: https://fsu.zoom.us/j/6234926316
Message-ID: <mailman.1492.1585229864.81223.eoas-seminar@lists.fsu.edu>

Zoom Meeting ID: https://fsu.zoom.us/j/6234926316<https://urldefense.com/v3/__https:/fsu.zoom.us/j/6234926316__;!!PhOWcWs!ntfOrep-8rtYp2jv7sPFDzC-_1sXWsteFFrhpVaw2nRZkEh6V2m7ujr6f-jm1q0$>

Meteorology Seminar

Jonathan Christophersen

PhD Meteorology Candidate



Title:  Observational analysis of atmospheric and oceanic diurnal cycles in the tropical Atlantic

Major Professor:  Dr. Philip Sura

Date: Thursday March 26, 2020                                   Time: 3:30 PM


Location: Zoom Meeting ID: https://fsu.zoom.us/j/6234926316<https://urldefense.com/v3/__https:/fsu.zoom.us/j/6234926316__;!!PhOWcWs!ntfOrep-8rtYp2jv7sPFDzC-_1sXWsteFFrhpVaw2nRZkEh6V2m7ujr6f-jm1q0$>


ABSTRACT
Interactions between the lower atmosphere and upper ocean on diurnal time scales are assessed in the tropical Atlantic Ocean by combining over 20 years of observations from the Prediction and Research Moored Array in the Tropical Atlantic (PIRATA) with reanalysis, satellite, and model data. In the first section of this study, analysis of surface winds and pressure from PIRATA moorings along 23oW reveals semi-diurnal patterns in the 10-meter zonal wind anomalies and a diurnal pattern in the 10-meter meridional wind anomalies. Past research on the diurnal and semi-diurnal wind patterns observed in the tropical Pacific concluded that the zonal semi-diurnal wind patterns are consistent with migrating atmospheric thermal tidal (ATT) forcing. However, causes of the diurnal cycle in the meridional winds remains elusive. This work extends the past analysis in the tropical Pacific to show how the nonmigrating ATT drives the diurnal cycle of the meridional winds and how that leads to an offshore early morning precipitation maximum during the boreal summer in the tropical Atlantic basin.

Secondly, data from the Tropical Atlantic Current Observation Study (TACOS) at 4oN, 23oW is analyzed to better understand air-sea coupling in the equatorial Atlantic Ocean on short time scales. This particular PIRATA mooring offers high-temporal resolution (10 minute - 1 hour) wind, current, temperature, and salinity data from 2017 to the present. Equipped with 11 current sensors, this site uniquely resolves the diurnal cycle of vertical shear. Throughout the first deployment of the TACOS mooring (March 2017 - March 2018), the presence of a shear-variance layer was observed. Spectral analysis confirms that significant oscillations in the seasonal thermocline, due to the passage of internal tides, modulate the velocity field, altering the shear. During those times that experienced high diurnal SST amplitudes, the deepening nocturnal mixed layer interacts with the shear-variance reservoir, thereby enhancing marginal instability.

Upper-ocean processes are then compared between the PIRATA/TACOS observations and the Nucleus for European Modelling of the Ocean (NEMO) model in the last part of this study. Similarities and discrepancies in mixing processes, static stability, upper-ocean currents as a response to wind forcing, and other air-sea components are discussed. Discrepancies between the dynamic and thermohaline fields persist throughout the record of the analysis time period, thereby contributing to differences in the stratification and shear, resulting in the model being "over mixed".




Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 26 09:44:39 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 26 Mar 2020 13:44:39 +0000
Subject: [Eoas-seminar] Meteorology PhD Defense for Robert West, Thursday,
 April 2, 2020, 3:30 PM, Zoom meeting ID: https://fsu.zoom.us/j/657801371
Message-ID: <mailman.1493.1585230281.81223.eoas-seminar@lists.fsu.edu>

Join Zoom Meeting          https://fsu.zoom.us/j/657801371



Meteorology Seminar

Robert West

PhD Meteorology Candidate



Title:  An evaluation of non-Gaussian climate statistics

Major Professor:  Dr. Philip Sura

Date: Thursday April 2, 2020                             Time: 3:30 PM


Location: Zoom meeting ID: https://fsu.zoom.us/j/657801371



ABSTRACT

Earth's atmosphere-ocean system is distinguished by its variability over a wide range of time scales. The non-linear interactions between these time scales are complex and are further complicated by the large number of subsystems and modes in the atmosphere-ocean system. Here, we explore a stochastic model developed by Sardeshmukh and Sura which uses correlated additive and multiplicative (CAM) noise and relies on a state-dependent (multiplicative) noise forcing to represent the multi-scale interactions between weather and climate.

An important problem in climate variability is the statistical representation of extreme weather and climate events. While a description of the tails of a probability density function (pdf) is essential for modeling extreme events, an understanding of the full pdf is required to capture the full dynamics of the atmosphere-ocean system. On daily scales, the statistics of the large-scale atmospheric circulation are non-Gaussian. A one-dimensional pdf produced by the CAM noise model, or stochastically generated skewed (SGS) distribution, attempts to probabilistically represent the non-Gaussian statistics of atmospheric climate anomalies.

This study evaluates the ability of the SGS distribution to represent the of non-Gaussian statistics of several atmospheric variables using NOAA-CIRES-DOE Twentieth Century Reanalysis Project version 2c (20CRv2c) dataset. A method of moments SGS parameter estimation technique described Sardeshmukh et al (2015) is implemented in a Julia software package and applied to global gridded time series of reanalysis data. Goodness-of-fit tests show the SGS distribution performs well in regions of near-zero and positive kurtosis, but produces statistically implausible with time series with negative sample kurtosis. However, the SGS distribution is found to outperform the standard normal (Gaussian) distribution at nearly all gridded locations, even where the SGS fit is poor. The SGS distributions of two 67 year 20CRv2c periods are also compared, where few significant changes in the shape of the SGS distribution are found.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Thu Mar 26 10:12:59 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Thu, 26 Mar 2020 14:12:59 +0000
Subject: [Eoas-seminar] GFDI/Department of Scientific Computing Graduate
 Student Seminar on Thursday, April 2, 2020 at 2:00PM via zoom
Message-ID: <mailman.1526.1585231985.81223.eoas-seminar@lists.fsu.edu>

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&                                      GFDI and Department of Scientific Computing Seminar                                                                                                             &
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TITLE:
A method of fuel characterization for fire behavior models and the influence of fuel heterogeneity on fire spread.
SPEAKER: Mr. Daniel Rosales Giron
                  MS Graduate Candidate
                  Department of Scientific Computing & GFD Fire Dynamics Program
MAJOR PROFESSOR: Dr. Kevin Speer
DATE & TIME: Thursday, April 2nd, 2020 at  2:00 PM
Zoom Meeting ID: https://fsu.zoom.us/j/352810092<https://urldefense.com/v3/__https://fsu.zoom.us/j/352810092__;!!PhOWcWs!nvfNogdS7gmcnTih5Y3o99Bu1OAFg9GOn2g-GN5yYWqCZ51eTKbZ0tjmSHtdumA$>
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&                                                      DEFENSE FOLLOWS THE SEMINAR                                                                                                                                &
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Abstract:
High spatial variability has been observed in simple fuelbeds (Keane et al.2012, Hiers et al. 2009) which accentuates the need to describe the actual fuel arrangement and composition of fuels in a prescribed or wildfire operation setting as opposed to abstract representations, regardless of model application and domain size.Working with high resolution 3D datasets, I will apply TLS scan information of highly instrumented burn plots in Pebble Hill and Eglin Air Force Base to create voxelized data arrays containing bulk density and fuel height for surface fuels <1m on a horizontal resolution of 0.5 m2. This will be coupled with a common method to populate the environment with trees described in Linn et al. (2005), where fuel is assigned to voxels depending on tree inputs including tree location, height, height to live crown, crown radius, and crown concavity. Starting at the resolution of the fire grid on QUIC-Fire (2m), fuels will be aggregated, and characteristics will be calculated with resolutions of 2, 4, 6, 8, 16, and 32 m, as well as using a single fuel characteristic for the entire plot. I will then use QUIC-Fire under a full range of wind and dead fuel moisture conditions common to prescribed and wildland fires to represent potential ranges of fire intensity, since it is possible that fuel resolution is only relevant for fire intensities under a particular threshold of wind speed, moisture content, or some combination of each. These thresholds will be investigated using a suite of different metrics that have been developed to fully describe the fire environment. Some of these include the bulk rate of spread (analogous to perimeter growth rate), the reduced area, and the normalized canopy consumption, as well as more traditional metrics such as surface fuel consumption and max downwind spread rate. Using QUIC-Fire in an ensemble fashion will allow us to calculate a margin of error that?s considered acceptable for every run, and sensitivity to the fuel heterogeneity can then be tested



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From eoas-seminar at lists.fsu.edu  Fri Mar 27 11:05:21 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Fri, 27 Mar 2020 15:05:21 +0000
Subject: [Eoas-seminar] Oceanography Dissertation Defense - Bryan Keller -
 April 2, 1:00  TIME CORRECTION
Message-ID: <mailman.2375.1585321524.81223.eoas-seminar@lists.fsu.edu>

Join Zoom Meeting:  https://fsu.zoom.us/j/328373041



Oceanography Seminar

Bryan Keller

PhD Oceanography Candidate



TITLE: THE SPATIAL ECOLOGY OF THE BONNETHEAD, SPHYRNA TIBURO:  MIGRATION, PARTURITION AND MAGNETIC-BASED NAVIGATION

Major Professor:  Dr. Dean Grubbs



Date: Thursday April 2, 2020                             Time: 1:00 PM (Note time correction)



Location: Zoom meeting ID:  https://fsu.zoom.us/j/328373041





ABSTRACT

 Elasmobranch fishes are a highly vagile group that often cross state, regional or international boundaries. Delineating migratory patterns that cross jurisdictional boundaries is essential for effective management, especially when confronted with fishing pressures that vary over space and time. In addition to migrating individuals, studying critical life stages, such as neonates, is important for fisheries management. These neonates can be essential for recruitment to adult populations and proper management should be a priority.

We used passive acoustic telemetry to track the migrations of 44 bonnetheads, Sphyrna tiburo, a widely distributed small coastal shark in the western hemisphere. We monitored individuals for up to 1506 days across ~ 1070 km of Southeastern United States Atlantic coastline. The majority of these sharks exhibited strong site fidelity to the North Edisto River in South Carolina and returned annually, residing in the estuary from April to November. Climatic migrations then occurred and overwintering habitats were located throughout Georgia and mid-Florida waters. We present, for the first time to our knowledge, the interannual effects of climatic variation on the seasonal migrations of individual sharks. We found that interannual variations in sea surface temperature had significant effects on the migration distance, duration, and date of arrival to overwintering habitats of individual sharks. An electivity analysis suggested that overwintering locations are selected based upon thermal range and not physical location. Given the significant effects of sea surface temperature on migration, future migrations may be altered due to climate change and warming seas. The effect of shorter migrations or the overwintering presence of S. tiburo in more northerly habitats is unknown. Given the degree of site fidelity observed, our work also has robust implications for the management of this species, as animals with strong ties to specific locations are put at high risks of localized extirpation. The data generated from this study can be used to generate predictive models that can estimate migration/overwintering areas based upon sea surface temperature. These areas can then be protected during migration should the stock become imperiled.

While monitoring the residency of S. tiburo in the North Edisto River we noticed a repeated absence of acoustic detections that aligned with the temporal span when parturition occurs. This absence from the NER suggested they may be giving birth outside of the estuarine waters. We used acoustic telemetry to track pregnant females and found they left the NER for ~2 weeks every year. During this time they underwent a gametic migration down the coast of the United States into the coastal waters of southern South Carolina and Georgia. We also analyzed fishery independent surveys and found neonates began to appear in nearshore trawls during this same time period. The mature females caught in these surveys also lost ~1 kg of total body weight from summer to early fall, which we suspect indicates a birthing event. A separate study on the same population of sharks identified that bonnetheads captured in mid-September were post-partum. Collectively these data illustrate that bonnetheads emigrate from the NER while pregnant, migrate down the coast, give birth and return to the NER where they stay until early November. These data are important for the management of the bonnethead because their primary source of mortality is the shrimp fishery, which has heavy spatial overlap in these nearshore waters, and a recent stock assessment suggested these trawlers could be contributing to heavy pressure on the bonnethead.

Throughout the first two research chapters, we have identified that migration is common in marine animals. Bonnetheads from the North Edisto River were shown to migrate over 1,000 km and successfully return to a target location. In order for these movements to be possible, having a map sense may be important, and the earth's magnetic field appears to be an important component of this behavior for other taxa.  Whilst sharks have been at the forefront of sensory physiology research on sensitivity to electromagnetic fields, whether they use Earth's magnetic field for navigation is controversial. Here we use a "magnetic displacement" experiment to show that sharks can use the map-like information from earth's magnetic field to orient. Bonnethead sharks captured along the panhandle of Florida and exposed to a southern field within their range in the Gulf of Mexico oriented homeward, whereas orientation was random when exposed to a northern field outside of their range (in the continental U.S.A.) and in a field that controlled for nonspecific effects of the testing procedure. Given that sharks could have experienced more southern magnetic fields than the test site, but never more northern fields, our findings are consistent with the hypothesis that sharks learn magnetic features for navigational tasks. The apparent ability of sharks to discriminate position using magnetic cues may also explain the sensory basis by which genetic structure of shark populations are maintained and how cryptic speciation can occur - despite no geographic barriers among reproductive locations.

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From eoas-seminar at lists.fsu.edu  Mon Mar 30 09:00:21 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 30 Mar 2020 13:00:21 +0000
Subject: [Eoas-seminar] Reminder: Oceanography Thesis Defense - Alexa
 Putillo - Mar 30, 10am - Zoom Meeting
Message-ID: <mailman.3167.1585573223.81223.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.



Topic: Masters Defense

Time: Mar 30, 2020 10:00 AM Eastern Time (US and Canada)



Join Zoom Meeting

Join URL: https://fsu.zoom.us/j/458653834<https://urldefense.com/v3/__https:/fsu.zoom.us/j/458653834__;!!Epnw_ITfSMW4!7d4wvOCyXQdslpkhXYwusnrvx20hF1Tt79m_kkNVuuYO0gYJQpmVfKw5V27gAZO44Q$>



Meeting ID: 458-653-834





Oceanography Defense



Alexa Putillo

M.S. Environmental Sciences Candidate



Title:  Influence of diet on blood biochemistry profiles in juvenile green turtles (Chelonia mydas)

Major Professor:  Dr. Mariana Fuentes



Date: Monday, March 30, 2020                        Time: 10:00 AM



Location: On virtual platform - see above for Zoom meeting information



ABSTRACT
Blood biochemistry profiles aid health assessment of marine turtles but knowledge of the influence of regional biological factors (e.g. habitat, diet) on marine turtle blood analyte values is limited. To investigate the influence of diet on blood chemistry values in juvenile green turtles (Chelonia mydas) we used carbon and nitrogen stable isotopes to provide a quantitative estimate of forage item proportions in green turtles feeding at two distinct areas (Bonefish Hole and South Flats) in Bimini, Bahamas. Blood samples were obtained from 13 turtles in Bonefish Hole (a mangrove tidal estuary) and 15 turtles in South Flats (an open water seagrass bed) in 2018. Sessile filter feeders contributed the largest proportion of diet in Bonefish Hole and seagrass contributed the highest proportion of diet in South Flats. Turtles at Bonefish Hole presented significantly lower cholesterol, total protein, phosphorus, triglycerides, and aspartate transaminase compared to South Flats. Across all turtles, those feeding primarily on red algae presented the highest uric acid and alkaline phosphatase and turtles with a seagrass-dominated diet had the highest cholesterol. Understanding dietary influence on blood biochemistry is a priority for green turtle conservation because it will help inform health and nutritional evaluations, and the trends reported can aid the interpretation of blood analyte values in marine turtle populations worldwide.


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From eoas-seminar at lists.fsu.edu  Mon Mar 30 09:28:03 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 30 Mar 2020 13:28:03 +0000
Subject: [Eoas-seminar] Meteorology MS Defense for William Curtis, Monday,
 March 30, 2020, 3:30 PM, Zoom only
Message-ID: <mailman.3176.1585574885.81223.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.

Zoom meeting URL: https://fsu.zoom.us/j/374872825<https://urldefense.com/v3/__https:/fsu.zoom.us/j/374872825__;!!PhOWcWs!nGBa02kLUR6eH2JGYAk3PDUeElPZ-Bog-lPRVYQDn1hhsibx2TSCIxhv7RlAiVQ$>

Meteorology Seminar

William Curtis

M.S. Meteorology Candidate



Title:  Electric Potential Gradient Behavior under Shallow Cumulus Clouds Using Electric Field Mills and Cumulus Cloud Top Vertical Growth at Kennedy Space Center and Cape Canaveral Air Force Station

Major Professor:  Dr. Henry Fuelberg

Date: Monday, March 30, 2020                        Time: 3:30 PM



Location: Zoom meeting URL: https://fsu.zoom.us/j/374872825<https://urldefense.com/v3/__https:/fsu.zoom.us/j/374872825__;!!PhOWcWs!nGBa02kLUR6eH2JGYAk3PDUeElPZ-Bog-lPRVYQDn1hhsibx2TSCIxhv7RlAiVQ$>


ABSTRACT


Kennedy Space Center (KSC) at the Cape Canaveral Air Force Station (CCAFS) launches spacecraft for NASA and private companies throughout the year. Since spacecraft are expensive to build and launch, a complicated set of guidelines has been developed to ensure their safety. The Lightning Launch Commit Criteria (LLCC) of the guidelines pertain to natural lightning and spacecraft triggered lightning. This research has investigated the Cumulus Cloud Rule, the most commonly violated component of the LLCC.  Using the network of field mills at KSC (the Launch Pad Lightning Warning System (LPLWS), fields of electric potential gradient (PG) are analyzed near cumulus clouds.

          This study focuses on cumulus having cloud top temperatures (CTT) between +5?C to -20?C. Each cloud of the dataset must be independent from nearby clouds, cannot be part of other convective systems, and must be located within the field mill network. The clouds are found using data from the TDR 43-250 weather radar at KSC/CCAFS. Thermodynamic profiles are obtained using radiosonde data from the KSC/CCAFS site (KXMR). Hydrometeor type is determined using a hydrometeor classification algorithm (HCA). The clouds are selected during Florida's warm season months, May through September.
            CTT is an important aspect of the Cumulus Cloud Rule of the LLCC since values specify an ascending vehicle's stand-off distance from the cloud. Colder CTTs require greater separation. However, present results show that PG versus distance is not directly related to CTT. For example, colder CTTs did not lead always to greater PG or PG values farther outside the fair field range. Results also reveal that cloud growth rates during the early stages of development vary. Inversions cause slow growth followed by rapid growth of the cloud. The median cloud growth from a warmer CTT (+5?C) to a colder CTT (0?C) was found to be less than 5 min, which translates to a median cloud growth speed between 10 to 15 ft s-1.


Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Mon Mar 30 15:04:47 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 30 Mar 2020 19:04:47 +0000
Subject: [Eoas-seminar] Oceanography Thesis Defense - Barry Walton - April 6,
 12 noon - Zoom meeting
Message-ID: <mailman.3489.1585595089.81223.eoas-seminar@lists.fsu.edu>

Please note that this defense will only take place through the Zoom online platform. Please download Zoom if you wish to attend.

Zoom meeting URL: https://fsu.zoom.us/j/267964221



Oceanography Defense

 Barry Walton

M.S. Biological Oceanography Candidate

Title : The influence of abiotic factors on spatial-temporal patterns of marine catfish (family: Ariidae) within the Apalachicola Bay System, Florida

Major Professor:  Dr. Mariana Fuentes



Date: Monday, April 06, 2020                        Time: 12:00 pm



Location: On virtual platform - https://fsu.zoom.us/j/267964221 Meeting ID: 267-964-221


Two species of marine catfishes (Ariopsis felis and Bagre marinus) are abundant within the Apalachicola Bay system during most of the year. They function as 2nd and 3rd order consumers and as prey for top predators. Males perform oral incubation, a trait of most ariid catfish species, and thus unique considerations may be required for conservation efforts. Current information on the abundance, movements, population structure and life histories of ariid catfish is lacking for the northern Gulf of Mexico. Therefore, the purpose of this study was to determine trends in catfish abundance and spatial distributions, as well as determine how abiotic factors influence these patterns. Fifteen years of monthly fishery independent survey data collected by the Florida Fish and Wildlife Conservation Commission were used to examine relative catch per unit effort (CPUE) and create spatially explicit kernel density estimates to observe spatial distributions. Boosted regression tree models were used to examine the influence of abiotic factors upon catfish abundance and movement. Adults were most abundant prior to and during the spawning season in May through August and juvenile abundance was highest 9-12 weeks after spawning activity. An annual temperature-driven migration event was documented. Spatial distributions of adults showed partitioning for spawning purposes and juveniles exhibited overlapping distributions. Boosted regression tree models revealed that all analyzed predictor variables were important to the presence and distribution of A. felis and B. marinus. Salinity, water temperature, depth and clarity were found to be most important while pH and dissolved oxygen were less important. These results differ from observations of ariid catfish in tropical ecosystems in which spawning areas are more segregated, migration events occur biannually and are salinity driven.

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From eoas-seminar at lists.fsu.edu  Mon Mar 30 15:31:08 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Mon, 30 Mar 2020 19:31:08 +0000
Subject: [Eoas-seminar] Michael Anand, Honors in the Major defense, Tuesday,
 March 31, 3:30 PM, Zoom meeting 889492830
Message-ID: <mailman.3509.1585596671.81223.eoas-seminar@lists.fsu.edu>

Zoom Meeting only - https://fsu.zoom.us/j/889492830<https://urldefense.com/v3/__https:/fsu.zoom.us/j/889492830__;!!PhOWcWs!l8DNneqz4ryaecaB7h-9N5RLT9hHLjwlVp-ZKmyr4dKXFxEvzMNbXIBCw5qAeuw$>


Honors in the Major defense for Michael Anand
Tuesday, March 31, 2020 at 3:30 PM
Major Professor: Dr. Fuelberg

Title:  Analysis of the 1st-3rd December 2018 South Georgia and North Florida Flooding Event.



Shel McGuire
Florida State University
Academic Program Specialist
Department of Earth, Ocean, & Atmospheric Science
1011 Academic Way, 2019 EOA Building
Tallahassee, FL 32306
850-644-8582

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From eoas-seminar at lists.fsu.edu  Tue Mar 31 13:01:58 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 31 Mar 2020 17:01:58 +0000
Subject: [Eoas-seminar] Social distancing
Message-ID: <mailman.4089.1585674122.81223.eoas-seminar@lists.fsu.edu>

https://www.youtube.com/watch?v=TR66SkaRt7k


Markus Huettel
Department of Earth, Ocean and Atmospheric Science
Florida State University
117 N Woodward Ave.
P.O. Box 3064320
Tallahassee, Florida 32306-4320
USA

Phone: (850) 645-1394
Fax: (850) 644-2581
Email:  mhuettel at fsu.edu
Website: http://myweb.fsu.edu/mhuettel/



From eoas-seminar at lists.fsu.edu  Tue Mar 31 14:31:44 2020
From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu)
Date: Tue, 31 Mar 2020 18:31:44 +0000
Subject: [Eoas-seminar] Geology Thesis Defense - Matthew Schreck - April 9,
 10 am - Zoom meeting
Message-ID: <mailman.4155.1585679507.81223.eoas-seminar@lists.fsu.edu>

Zoom Meeting only - https://fsu.zoom.us/j/4574412558<https://urldefense.com/v3/__https:/fsu.zoom.us/j/4574412558__;!!PhOWcWs!jy2TiXZLfHfcMt3ep8LZQc9nC3ZaDtwkeKgvGTQeHcnw87evjxVPwF1YpV5I120$>

Title: Geology of the Dadeville Complex in the Abbotsford 7.5' Quadrangle, Appalachian Inner Piedmont of Eastern Alabama and Western Georgia
Major Professor: Jim Tull

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