From eoas-seminar at lists.fsu.edu Mon Aug 3 16:34:02 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 3 Aug 2020 20:34:02 +0000 Subject: [Eoas-seminar] Reminder: Geology Dissertation Defense - Nawwaf Almuntshry - Aug 4, 2p - zoom meeting Message-ID: Nawwaf Almuntshry - Aug 4, 2pm Title: Structural Evolution of the Mulberry Recess Eastern Blue Ridge-Talladega: Northwest Georgia Appalachians Major Professor: Jim Tull Zoom Meeting: Meeting ID: 952 6230 8300 https://fsu.zoom.us/meeting/95262308300 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Aug 4 08:57:42 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 4 Aug 2020 12:57:42 +0000 Subject: [Eoas-seminar] Meteorology MS Defense for Frederick Soster, Tuesday, August 11, 2020, 3:00 PM, on Zoom 99506435144 Message-ID: Meteorology Seminar Frederick Soster M. S. Meteorology Candidate Title: EVALUATING FRONTAL PRECIPITATION CONSISTENCY WITHIN REANALYSIS DATASETS Major Professor: Dr. Rhys Parfitt Date: August 11th, 2020 Time: 3:00 PM Location: Zoom Meeting URL: https://fsu.zoom.us/j/99506435144 ABSTRACT Precipitation from atmospheric fronts accounts for a significant portion of the total precipitation in the mid-latitudes, with some locations receiving the majority of their precipitation from atmospheric fronts. In addition, a significant proportion of extreme precipitation events coincide with a frontal passage in the mid-latitudes, and some of these events lead to extreme flooding which can have important and costly socio-economic consequences. Climatological studies regarding both atmospheric fronts and precipitation frequently use global reanalysis datasets due to their cohesive record of many atmospheric variables over a temporal range of generally 40 years or longer. Differences between these reanalyses regarding observations assimilated, atmospheric model used, and grid size contribute to differences in regional precipitation accumulations and the structure and frequency of identified atmospheric fronts. It is therefore important to understand how frontal precipitation is represented in global reanalysis datasets. As much of the literature on atmospheric fronts and frontal precipitation are limited to the use of a single global reanalysis or regional model, this thesis seeks to investigate the consistency among frontal identification and frontal precipitation within multiple reanalyses. The following reanalyses were used based on data availability, spatial and temporal resolution, and use within the literature: ERA-20C, ERA-40, ERA-Interim, ERA5, JRA-55, MERRA-2, NCEP-CFSR, and NOAA20C V2C. Two satellite precipitation products, CMORPH and TRMM, were also used for comparison of frontal precipitation with ERA5, as these three datasets shared the same grid and grid spacing. There are numerous methods to identify atmospheric fronts that rely on different parameters involving temperature and/or wind. While different front diagnostics give similar results geographically in terms of frequency and structure, each diagnostic has its own strengths and weaknesses. As the choice of front diagnostic has been shown to result in differences frontal frequency when using the same reanalysis, two different front diagnostics are used. Results show that reanalyses with a finer grid spacing (i.e. less than 0.5o x 0.5o) contain a 200% increase in globally averaged mean annual frontal frequency for one diagnostic and a 450% increase in globally averaged mean annual frontal frequency for the other diagnostic compared to reanalyses with coarse grid spacing (i.e. 2.0o x 2.0o). Results also show that reanalyses with a finer grid spacing see a 150% increase in globally averaged mean annual frontal precipitation proportion for one diagnostic and a 460% increase in globally averaged mean annual frontal precipitation proportion compared to coarser grid-spaced reanalyses. The largest differences between reanalyses in both frontal frequency and frontal precipitation proportion exist in the tropics for both diagnostics. Differences between reanalyses regarding both frontal frequency and frontal precipitation proportion are indicated to be strongly related to the differing grid spacings of each reanalysis. To account for differing grid spacings, the reanalyses and satellite precipitation products are regridded to the same coarser grid spacing, and both diagnostics and their frontal precipitation are recalculated on this grid to attribute differences in both frontal frequency and frontal precipitation to either differing grid spacings between reanalyses or differences inherent to reanalyses. The regridded reanalyses have much more consistency regarding both frontal frequency and frontal precipitation proportion. Globally, 30% of the difference in the means of mean annual frontal frequency of all eight reanalyses is attributed to grid size for one diagnostic, while 59% of the difference is attributed to grid size for the other diagnostic. Allocation of frontal precipitation closely follows the frequency of identified fronts. Globally, 28% of the difference in the means of mean annual frontal precipitation proportion of all eight reanalyses is attributed to grid size for one diagnostic while 61% of the difference is attributed to grid size for the other diagnostic. Both diagnostics show that the percent difference in frontal frequency and frontal precipitation proportion is highly dependent on geographical area. Objective frontal identification and frontal precipitation proportion is highly dependent on the choice of diagnostic, the region under consideration, the grid spacing of the reanalysis, and the reanalysis or reanalyses used. These results strongly suggest that research regarding both frontal identification and frontal precipitation should use more than one reanalysis. 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Aug 6 09:17:23 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 6 Aug 2020 13:17:23 +0000 Subject: [Eoas-seminar] Meteorology PhD Defense for Kurtis Schubeck, Thursday, August 20, 2020, 3:30 PM on zoom Message-ID: Meteorology Seminar Kurtis Schubeck PhD Meteorology Candidate Title: The Effect of moist physics and resolution on baroclinic wave evolution Major Professor: Dr. Jeff Chagnon Date: August 20th, 2020 Time: 3:30 PM Location: ZOOM ABSTRACT The advancement of numerical weather prediction (NWP) has hastened the effort to understand how moist processes -- many of which are parameterized in NWP models -- influence cyclone structure and intensity. Despite this effort, there still remain many open questions about the actual mechanisms by which moist physical processes modify a baroclinic wave and where those mechanisms are active. Recent investigations have focused on the roles of microphysics, convection, radiation, and horizontal potential vorticity (PV) dipoles in the modification of PV in the warm conveyor belt of an extratropical cyclone. These previous studies were designed to identify localized anomalies in PV and to determine how those anomalies were generated, either through use of Lagrangian trajectories or passive tracers. While these studies have provided a detailed description of the sub-synoptic scale modification of a cyclone due to diabatic processes, they have not clarified what is the overall impact of diabatic processes on the system-wide structure and evolution of the cyclone. The purpose of this study is to determine the systematic impact of parameterized process and resolution changes on the entirety of the cyclone. To accomplish this goal, an ensemble of simulations is conducted using various parametrization and resolution configurations. Through analysis of the ensemble of simulations, the complete effects of radiation, convection, and cloud microphysics on cyclone evolution are diagnosed. Analysis of vertical profiles of PV averaged over the effective cyclone area (ECA) demonstrate that the baroclinic wave evolution is dominated by three processes: dry dynamics, microphysics, and radiation. Including cloud microphysics without radiation results in a cyclone that grows rapidly, reaching its peak intensity the earliest before cutting off and weakening. Despite rapid deepening, these "microphysics-only" simulations produce less precipitation and latent heating over the entire lifecycle when compared to the simulations that included radiation. The simulations with radiation deepen more slowly and cut off at a later time. Despite the slower evolution of the cyclone in the simulations with radiation, all simulations with radiation result in higher eddy kinetic energy and eddy available potential energy by the end of the simulation. While the tendencies contributed directly from the radiation scheme are relatively small, the inclusion of radiation also indirectly enhances the PV anomaly from the microphysics scheme. While diabatic heating and DPV generation from radiation are small in comparison to the microphysics scheme, the nonlinear effects of radiation on the cyclone as a whole are significant. It is concluded that radiation plays a more important role in extratropical cyclone dynamics than originally thought and that diagnosing the effects of radiation in isolation from other physical process can lead to misleading results. Finally, it is shown that the system-scale structure and evolution of the cyclone is largely insensitive to grid resolution or the partitioning of precipitation between convective and large-scale contributions. 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Aug 10 07:27:07 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 10 Aug 2020 11:27:07 +0000 Subject: [Eoas-seminar] Meteorology MS Defense for Frederick Soster, Tuesday, August 11, 2020, 3:00 PM, on Zoom 99506435144 Message-ID: Meteorology Seminar Frederick Soster M. S. Meteorology Candidate TITLE: EVALUATING FRONTAL PRECIPITATION CONSISTENCY WITHIN REANALYSIS DATASETS Major Professor: Dr. Rhys Parfitt Date: August 11th, 2020 Time: 3:00 PM Location: Zoom Meeting URL: https://fsu.zoom.us/j/99506435144 ABSTRACT Precipitation from atmospheric fronts accounts for a significant portion of the total precipitation in the mid-latitudes, with some locations receiving the majority of their precipitation from atmospheric fronts. In addition, a significant proportion of extreme precipitation events coincide with a frontal passage in the mid-latitudes, and some of these events lead to extreme flooding which can have important and costly socio-economic consequences. Climatological studies regarding both atmospheric fronts and precipitation frequently use global reanalysis datasets due to their cohesive record of many atmospheric variables over a temporal range of generally 40 years or longer. Differences between these reanalyses regarding observations assimilated, atmospheric model used, and grid size contribute to differences in regional precipitation accumulations and the structure and frequency of identified atmospheric fronts. It is therefore important to understand how frontal precipitation is represented in global reanalysis datasets. As much of the literature on atmospheric fronts and frontal precipitation are limited to the use of a single global reanalysis or regional model, this thesis seeks to investigate the consistency among frontal identification and frontal precipitation within multiple reanalyses. The following reanalyses were used based on data availability, spatial and temporal resolution, and use within the literature: ERA-20C, ERA-40, ERA-Interim, ERA5, JRA-55, MERRA-2, NCEP-CFSR, and NOAA20C V2C. Two satellite precipitation products, CMORPH and TRMM, were also used for comparison of frontal precipitation with ERA5, as these three datasets shared the same grid and grid spacing. There are numerous methods to identify atmospheric fronts that rely on different parameters involving temperature and/or wind. While different front diagnostics give similar results geographically in terms of frequency and structure, each diagnostic has its own strengths and weaknesses. As the choice of front diagnostic has been shown to result in differences frontal frequency when using the same reanalysis, two different front diagnostics are used. Results show that reanalyses with a finer grid spacing (i.e. less than 0.5o x 0.5o) contain a 200% increase in globally averaged mean annual frontal frequency for one diagnostic and a 450% increase in globally averaged mean annual frontal frequency for the other diagnostic compared to reanalyses with coarse grid spacing (i.e. 2.0o x 2.0o). Results also show that reanalyses with a finer grid spacing see a 150% increase in globally averaged mean annual frontal precipitation proportion for one diagnostic and a 460% increase in globally averaged mean annual frontal precipitation proportion compared to coarser grid-spaced reanalyses. The largest differences between reanalyses in both frontal frequency and frontal precipitation proportion exist in the tropics for both diagnostics. Differences between reanalyses regarding both frontal frequency and frontal precipitation proportion are indicated to be strongly related to the differing grid spacings of each reanalysis. To account for differing grid spacings, the reanalyses and satellite precipitation products are regridded to the same coarser grid spacing, and both diagnostics and their frontal precipitation are recalculated on this grid to attribute differences in both frontal frequency and frontal precipitation to either differing grid spacings between reanalyses or differences inherent to reanalyses. The regridded reanalyses have much more consistency regarding both frontal frequency and frontal precipitation proportion. Globally, 30% of the difference in the means of mean annual frontal frequency of all eight reanalyses is attributed to grid size for one diagnostic, while 59% of the difference is attributed to grid size for the other diagnostic. Allocation of frontal precipitation closely follows the frequency of identified fronts. Globally, 28% of the difference in the means of mean annual frontal precipitation proportion of all eight reanalyses is attributed to grid size for one diagnostic while 61% of the difference is attributed to grid size for the other diagnostic. Both diagnostics show that the percent difference in frontal frequency and frontal precipitation proportion is highly dependent on geographical area. Objective frontal identification and frontal precipitation proportion is highly dependent on the choice of diagnostic, the region under consideration, the grid spacing of the reanalysis, and the reanalysis or reanalyses used. These results strongly suggest that research regarding both frontal identification and frontal precipitation should use more than one reanalysis. 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Aug 10 16:15:53 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 10 Aug 2020 16:15:53 -0400 Subject: [Eoas-seminar] UPCOMING WEBINAR by David Zierden: Climate Change & Variability in Florida -, What we know (and don't know) Message-ID: UPCOMING WEBINAR: Climate Change & Variability in Florida - What we know (and don't know) ** ** During a webinar being hosted by the FL BRACE (Building Resilience Against Climate Effects) project, Florida's State Climatologist, David Zierden, will review global trends in increasing greenhouse gas concentrations and how they are impacting the global climate system before narrowing the focus on how these trends are manifested in the state of Florida. Special attention will be placed on how climate and weather threats, especially as related to human health, may or may not be changing. The primary threats that will be examined are hurricanes, extreme rainfall and drought, sea level rise, and extreme temperatures. Not to be ignored is the background of Florida's historical climate and natural variability, much of which can be related to the El Ni?o/La Ni?a cycle.?To join the webinar from your computer, tablet or smartphone on *Wednesday, August 12 at 11AM (ET)*, go to https://global.gotomeeting.com/join/522948533 -- Eric Chassignet Professor and Director Center for Ocean-Atmospheric Prediction Studies (COAPS) Florida State University 2000 Levy Avenue, Building A, Suite 292 P.O. Box 3062741 Tallahassee, FL 32306-2741 Office : (1) 850-645-7288 COAPS : (1) 850-644-3846 Cell : (1) 850-524-0033 (urgent matters only) FAX : (1) 850-644-4841 E-mail : echassignet at fsu.edu http://www.coaps.fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Aug 11 09:20:36 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 11 Aug 2020 13:20:36 +0000 Subject: [Eoas-seminar] Reminder: Meteorology MS Defense for Frederick Soster, Tuesday, August 11, 2020, 3:00 PM, on Zoom 99506435144 Message-ID: Meteorology Seminar Frederick Soster M. S. Meteorology Candidate TITLE: EVALUATING FRONTAL PRECIPITATION CONSISTENCY WITHIN REANALYSIS DATASETS Major Professor: Dr. Rhys Parfitt Date: August 11th, 2020 Time: 3:00 PM Location: Zoom Meeting URL: https://fsu.zoom.us/j/99506435144 ABSTRACT Precipitation from atmospheric fronts accounts for a significant portion of the total precipitation in the mid-latitudes, with some locations receiving the majority of their precipitation from atmospheric fronts. In addition, a significant proportion of extreme precipitation events coincide with a frontal passage in the mid-latitudes, and some of these events lead to extreme flooding which can have important and costly socio-economic consequences. Climatological studies regarding both atmospheric fronts and precipitation frequently use global reanalysis datasets due to their cohesive record of many atmospheric variables over a temporal range of generally 40 years or longer. Differences between these reanalyses regarding observations assimilated, atmospheric model used, and grid size contribute to differences in regional precipitation accumulations and the structure and frequency of identified atmospheric fronts. It is therefore important to understand how frontal precipitation is represented in global reanalysis datasets. As much of the literature on atmospheric fronts and frontal precipitation are limited to the use of a single global reanalysis or regional model, this thesis seeks to investigate the consistency among frontal identification and frontal precipitation within multiple reanalyses. The following reanalyses were used based on data availability, spatial and temporal resolution, and use within the literature: ERA-20C, ERA-40, ERA-Interim, ERA5, JRA-55, MERRA-2, NCEP-CFSR, and NOAA20C V2C. Two satellite precipitation products, CMORPH and TRMM, were also used for comparison of frontal precipitation with ERA5, as these three datasets shared the same grid and grid spacing. There are numerous methods to identify atmospheric fronts that rely on different parameters involving temperature and/or wind. While different front diagnostics give similar results geographically in terms of frequency and structure, each diagnostic has its own strengths and weaknesses. As the choice of front diagnostic has been shown to result in differences frontal frequency when using the same reanalysis, two different front diagnostics are used. Results show that reanalyses with a finer grid spacing (i.e. less than 0.5o x 0.5o) contain a 200% increase in globally averaged mean annual frontal frequency for one diagnostic and a 450% increase in globally averaged mean annual frontal frequency for the other diagnostic compared to reanalyses with coarse grid spacing (i.e. 2.0o x 2.0o). Results also show that reanalyses with a finer grid spacing see a 150% increase in globally averaged mean annual frontal precipitation proportion for one diagnostic and a 460% increase in globally averaged mean annual frontal precipitation proportion compared to coarser grid-spaced reanalyses. The largest differences between reanalyses in both frontal frequency and frontal precipitation proportion exist in the tropics for both diagnostics. Differences between reanalyses regarding both frontal frequency and frontal precipitation proportion are indicated to be strongly related to the differing grid spacings of each reanalysis. To account for differing grid spacings, the reanalyses and satellite precipitation products are regridded to the same coarser grid spacing, and both diagnostics and their frontal precipitation are recalculated on this grid to attribute differences in both frontal frequency and frontal precipitation to either differing grid spacings between reanalyses or differences inherent to reanalyses. The regridded reanalyses have much more consistency regarding both frontal frequency and frontal precipitation proportion. Globally, 30% of the difference in the means of mean annual frontal frequency of all eight reanalyses is attributed to grid size for one diagnostic, while 59% of the difference is attributed to grid size for the other diagnostic. Allocation of frontal precipitation closely follows the frequency of identified fronts. Globally, 28% of the difference in the means of mean annual frontal precipitation proportion of all eight reanalyses is attributed to grid size for one diagnostic while 61% of the difference is attributed to grid size for the other diagnostic. Both diagnostics show that the percent difference in frontal frequency and frontal precipitation proportion is highly dependent on geographical area. Objective frontal identification and frontal precipitation proportion is highly dependent on the choice of diagnostic, the region under consideration, the grid spacing of the reanalysis, and the reanalysis or reanalyses used. These results strongly suggest that research regarding both frontal identification and frontal precipitation should use more than one reanalysis. 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Aug 13 15:24:14 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 13 Aug 2020 19:24:14 +0000 Subject: [Eoas-seminar] Meteorology PhD Defense for Kurtis Schubeck, Thursday, August 20, 2020, 3:30 PM on zoom Message-ID: Meteorology Seminar Kurtis Schubeck PhD Meteorology Candidate Title: The Effect of moist physics and resolution on baroclinic wave evolution Major Professor: Dr. Jeff Chagnon Date: August 20th, 2020 Time: 3:30 PM Location: ZOOM ABSTRACT The advancement of numerical weather prediction (NWP) has hastened the effort to understand how moist processes -- many of which are parameterized in NWP models -- influence cyclone structure and intensity. Despite this effort, there still remain many open questions about the actual mechanisms by which moist physical processes modify a baroclinic wave and where those mechanisms are active. Recent investigations have focused on the roles of microphysics, convection, radiation, and horizontal potential vorticity (PV) dipoles in the modification of PV in the warm conveyor belt of an extratropical cyclone. These previous studies were designed to identify localized anomalies in PV and to determine how those anomalies were generated, either through use of Lagrangian trajectories or passive tracers. While these studies have provided a detailed description of the sub-synoptic scale modification of a cyclone due to diabatic processes, they have not clarified what is the overall impact of diabatic processes on the system-wide structure and evolution of the cyclone. The purpose of this study is to determine the systematic impact of parameterized process and resolution changes on the entirety of the cyclone. To accomplish this goal, an ensemble of simulations is conducted using various parametrization and resolution configurations. Through analysis of the ensemble of simulations, the complete effects of radiation, convection, and cloud microphysics on cyclone evolution are diagnosed. Analysis of vertical profiles of PV averaged over the effective cyclone area (ECA) demonstrate that the baroclinic wave evolution is dominated by three processes: dry dynamics, microphysics, and radiation. Including cloud microphysics without radiation results in a cyclone that grows rapidly, reaching its peak intensity the earliest before cutting off and weakening. Despite rapid deepening, these "microphysics-only" simulations produce less precipitation and latent heating over the entire lifecycle when compared to the simulations that included radiation. The simulations with radiation deepen more slowly and cut off at a later time. Despite the slower evolution of the cyclone in the simulations with radiation, all simulations with radiation result in higher eddy kinetic energy and eddy available potential energy by the end of the simulation. While the tendencies contributed directly from the radiation scheme are relatively small, the inclusion of radiation also indirectly enhances the PV anomaly from the microphysics scheme. While diabatic heating and DPV generation from radiation are small in comparison to the microphysics scheme, the nonlinear effects of radiation on the cyclone as a whole are significant. It is concluded that radiation plays a more important role in extratropical cyclone dynamics than originally thought and that diagnosing the effects of radiation in isolation from other physical process can lead to misleading results. Finally, it is shown that the system-scale structure and evolution of the cyclone is largely insensitive to grid resolution or the partitioning of precipitation between convective and large-scale contributions. 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Aug 14 10:06:00 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 14 Aug 2020 14:06:00 +0000 Subject: [Eoas-seminar] covid-testing-fsu Message-ID: The University is highly encouraging all individuals who will be present on campus to undergo testing. As the semester starts soon and more people will be in our building, now would be a good time. https://uhs.fsu.edu/covid-testing-fsu Markus Huettel Department of Earth, Ocean and Atmospheric Science Florida State University 1011 Academic Way, Tallahassee, FL, 32306-4520 USA Phone: (850) 645-1394 Email: mhuettel at fsu.edu Website: http://myweb.fsu.edu/mhuettel/ From eoas-seminar at lists.fsu.edu Wed Aug 19 09:45:38 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 19 Aug 2020 13:45:38 +0000 Subject: [Eoas-seminar] Meteorology PhD Defense for Kurtis Schubeck, Thursday, August 20, 2020, 3:30 PM on zoom 94244381213 Message-ID: Zoom ID: https://fsu.zoom.us/j/94244381213 Meteorology Seminar Kurtis Schubeck PhD Meteorology Candidate Title: The Effect of moist physics and resolution on baroclinic wave evolution Major Professor: Dr. Jeff Chagnon Date: August 20th, 2020 Time: 3:30 PM Location: ZOOM ID: https://fsu.zoom.us/j/94244381213 ABSTRACT The advancement of numerical weather prediction (NWP) has hastened the effort to understand how moist processes -- many of which are parameterized in NWP models -- influence cyclone structure and intensity. Despite this effort, there still remain many open questions about the actual mechanisms by which moist physical processes modify a baroclinic wave and where those mechanisms are active. Recent investigations have focused on the roles of microphysics, convection, radiation, and horizontal potential vorticity (PV) dipoles in the modification of PV in the warm conveyor belt of an extratropical cyclone. These previous studies were designed to identify localized anomalies in PV and to determine how those anomalies were generated, either through use of Lagrangian trajectories or passive tracers. While these studies have provided a detailed description of the sub-synoptic scale modification of a cyclone due to diabatic processes, they have not clarified what is the overall impact of diabatic processes on the system-wide structure and evolution of the cyclone. The purpose of this study is to determine the systematic impact of parameterized process and resolution changes on the entirety of the cyclone. To accomplish this goal, an ensemble of simulations is conducted using various parametrization and resolution configurations. Through analysis of the ensemble of simulations, the complete effects of radiation, convection, and cloud microphysics on cyclone evolution are diagnosed. Analysis of vertical profiles of PV averaged over the effective cyclone area (ECA) demonstrate that the baroclinic wave evolution is dominated by three processes: dry dynamics, microphysics, and radiation. Including cloud microphysics without radiation results in a cyclone that grows rapidly, reaching its peak intensity the earliest before cutting off and weakening. Despite rapid deepening, these "microphysics-only" simulations produce less precipitation and latent heating over the entire lifecycle when compared to the simulations that included radiation. The simulations with radiation deepen more slowly and cut off at a later time. Despite the slower evolution of the cyclone in the simulations with radiation, all simulations with radiation result in higher eddy kinetic energy and eddy available potential energy by the end of the simulation. While the tendencies contributed directly from the radiation scheme are relatively small, the inclusion of radiation also indirectly enhances the PV anomaly from the microphysics scheme. While diabatic heating and DPV generation from radiation are small in comparison to the microphysics scheme, the nonlinear effects of radiation on the cyclone as a whole are significant. It is concluded that radiation plays a more important role in extratropical cyclone dynamics than originally thought and that diagnosing the effects of radiation in isolation from other physical process can lead to misleading results. Finally, it is shown that the system-scale structure and evolution of the cyclone is largely insensitive to grid resolution or the partitioning of precipitation between convective and large-scale contributions. 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Aug 20 15:34:30 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 20 Aug 2020 19:34:30 +0000 Subject: [Eoas-seminar] Fwd: [Eoas-metfaculty] New zoom link for Kurtis's seminar References: Message-ID: ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu Begin forwarded message: From: Jeffrey Chagnon via Eoas-metfaculty > Subject: [Eoas-metfaculty] New zoom link for Kurtis's seminar Date: August 20, 2020 at 3:32:51 PM EDT To: "eoas-metfaculty at lists.fsu.edu" > Cc: James Elsner > Reply-To: Jeffrey Chagnon > Jeffrey Chagnon is inviting you to a scheduled Zoom meeting. Topic: Kurtis Schubeck's Defense Seminar 2 Time: Aug 20, 2020 03:30 PM Eastern Time (US and Canada) Join Zoom Meeting https://fsu.zoom.us/j/97501018061 Meeting ID: 975 0101 8061 One tap mobile +13126266799,,97501018061# US (Chicago) +16465588656,,97501018061# US (New York) Dial by your location +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) +1 301 715 8592 US (Germantown) +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) +1 253 215 8782 US (Tacoma) Meeting ID: 975 0101 8061 Find your local number: https://fsu.zoom.us/u/adxiz4uxJH Join by SIP 97501018061 at zoomcrc.com Join by H.323 162.255.37.11 (US West) 162.255.36.11 (US East) 115.114.131.7 (India Mumbai) 115.114.115.7 (India Hyderabad) 213.19.144.110 (EMEA) 103.122.166.55 (Australia) 64.211.144.160 (Brazil) 69.174.57.160 (Canada) 207.226.132.110 (Japan) Meeting ID: 975 0101 8061 ***************************************** Dr. Jeffrey M Chagnon Teaching Professor EOAS, Florida State University P.O. Box 3064520 Tallahassee, FL 32306-4520 ***************************************** _______________________________________________ Eoas-metfaculty mailing list Eoas-metfaculty at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-metfaculty -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Aug 25 11:32:59 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 25 Aug 2020 15:32:59 +0000 Subject: [Eoas-seminar] Date Correction: Geology Prospectus Defense - Adam Karl - Sept 2, 10:30am - Zoom Message-ID: Geology Prospectus Defense - Adam Karl - Sept 2, 10:30am Title: Trace metal analysis of groundwater and pore fluids in the geographically isolated wetlands of the Munson Sand Hills Major Professor: Jeremy Owens Join Zoom Meeting https://fsu.zoom.us/j/94081394290?pwd=NWF3ZHFKVnF5c1VXRXNFbjhBQW4zZz09 Meeting ID: 940 8139 4290 Passcode: EOAS One tap mobile +16465588656,,94081394290# US (New York) +13017158592,,94081394290# US (Germantown) Dial by your location +1 646 558 8656 US (New York) +1 301 715 8592 US (Germantown) +1 312 626 6799 US (Chicago) +1 669 900 9128 US (San Jose) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) Meeting ID: 940 8139 4290 Find your local number: https://fsu.zoom.us/u/axuQpSose Join by SIP 94081394290 at zoomcrc.com Join by H.323 162.255.37.11 (US West) 162.255.36.11 (US East) 115.114.131.7 (India Mumbai) 115.114.115.7 (India Hyderabad) 213.19.144.110 (EMEA) 103.122.166.55 (Australia) 64.211.144.160 (Brazil) 69.174.57.160 (Canada) 207.226.132.110 (Japan) Meeting ID: 940 8139 4290 Passcode: 766060 -------------- next part -------------- An HTML attachment was scrubbed... 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