From eoas-seminar at lists.fsu.edu Thu Feb 14 14:09:01 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 14 Feb 2019 19:09:01 +0000 Subject: [Eoas-seminar] EOAS Seminar: Making Mountains 2/15 In-Reply-To: References: , Message-ID: Can I be removed for this list. I graduated. Thanks. Cassidy Payne On Feb 14, 2019, at 2:05 PM, "eoas-seminar at lists.fsu.edu" > wrote: Dear All, Please join us for tomorrow's ACC "Road Scholar" lecture by Dr. Nadine McQuarrie at 1:30 pm in the Strozier Library reading room (it's downstairs) - there will be a reception to follow. Thanks, Angie Knapp On 2/11/19 4:21 PM, eoas-seminar at lists.fsu.edu wrote: Audra Peoples Florida State University Outreach Coordinator Department of Earth, Ocean, & Atmospheric Science 1017 Academic Way, 308 Love Building (Meteorology) Tallahassee, FL 32306 _______________________________________________ Eoas-seminar mailing list Eoas-seminar at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-seminar -- ************************************************ Angela Knapp Assistant Professor Earth, Ocean and Atmospheric Science Dept. Florida State University Tallahassee, FL 32306-4520 (850) 644-0259 anknapp at fsu.edu http://myweb.fsu.edu/anknapp/ Ocean Science Building, Room 309 _______________________________________________ Eoas-seminar mailing list Eoas-seminar at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-seminar -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image004.png Type: image/png Size: 550437 bytes Desc: image004.png URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.jpg Type: image/jpeg Size: 11504 bytes Desc: image001.jpg URL: From eoas-seminar at lists.fsu.edu Sun Feb 17 08:50:04 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sun, 17 Feb 2019 08:50:04 -0500 Subject: [Eoas-seminar] Gerta Keller visit Feb 21-22 Message-ID: Prof. Gerta Keller (Princeton University) is visiting this week to present a seminar in the Department of Earth, Ocean & Atmospheric Science. Gerta has performed the most intensive forensic study of the Cretaceous-Tertiary mass extinction to find that the famed asteroid impact was not the culprit. Gerta?s work shows that massive continental flood basalt eruptions from the Deccan created global havoc that timed precisely with the extinctions. She has new chronological and geochemical results, and a Science paper coming out this Thursday, that she will be speaking about in regards to the cause of the extinction. I have included a title and abstract for her talk below. Keller seminar: Friday, February 22, in CAR 101 at 3:30 pm. Paroxysmal Deccan Eruptions and Climate Change cause End-Cretaceous Mass Extinction Gerta Keller, Princeton University Deccan volcanism and the Chicxulub impact are both linked to the end-Cretaceous mass extinction. The timing of these events relative to the mass extinction has long remained controversial. Mercury (Hg) anomalies from atmospheric fallout of Deccan eruptions in stratigraphic records provide a potential tool to discern the effects of volcanism versus impactor. The high-resolution Hg record from the astronomically-tuned Elles section (Tunisia), correlated with U-Pb geochronology of Deccan volcanism provides a robust proxy for Deccan volcanism. The time-resolved Hg record reveals massive volcanic eruptions (~30% of total Deccan volume) over the last 45 ky of the Maastrichtian ending with paroxysmal eruptions during the last 25 ky accompanied by ocean acidification and hyperthermal warming ending with the mass extinction. Recent speculations that the Chicxulub impact triggered a state shift in Deccan eruptions ~70 ky pre-KPB causing the mass extinction are unconfirmed and evidence for an impact coinciding with the mass extinction is lacking. (Science Feb. 21, 2019). We look forward to seeing you at the seminar. Thanks, Munir. Munir Humayun Professor Department of Earth, Ocean, and Atmospheric Science & National High Magnetic Field Laboratory Florida State University 1800 E. Paul Dirac Drive Tallahassee, FL32310 (850) 644-1908 (850) 644-0827 (FAX) -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Feb 20 10:06:46 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 20 Feb 2019 15:06:46 +0000 Subject: [Eoas-seminar] Meteorology MS Defense for Jiangmei Li, Tuesday, March 5, 2019, 3:30 PM, LOV353 Message-ID: Meteorology Seminar Jiangmei Li M.S. Meteorology Candidate Title: Classification of rain clouds based on the relationship between microwave emission and scattering signals Major Professor: Guosheng Liu Date: March 5, 2019 Time: 3:30 - 5:00 PM Location: Werner A. Baum Seminar Room (353 Love Building) (Please join us for refreshments served outside room 353 Love @ 3:00 PM) ABSTRACT In this thesis, we introduce a new approach to classify rain clouds based on the relationship between the emission signal and scattering signal derived from microwave brightness temperature data. Two parameters are used as indicators of emission signal and scattering signal respectively: one is the polarization difference (D) at 19 GHz, and the other one is the polarization-corrected temperature (PCT) at high-frequencies channels. D is related to the emission of liquid hydrometeors, and PCT mainly reflects the brightness temperature depression due to the scattering by ice particles. Both D and PCT decrease with increasing precipitation rate. Therefore, certain combinations of D and PCT can be regarded as the representatives of cloud hydrometeor structures. Based on the D-PCT relationship investigated in this study, we classified the observed rain clouds into five categories-non-precipitating, light-precipitating, liquid-dominant precipitating, well-mix precipitating, and ice-dominant precipitating cloud. We verified the results of the classification of different precipitation cases over tropical regions. For both the hurricane and front cases, the results show that the distributions of categorized cloud pixels can reflect the horizontal structure of the weather systems. The monthly gridded mean frequencies of categorized precipitating clouds are used to analyze the relationship between the seasonal and interannual cycles of tropical precipitation and clouds' hydrometeor components. Moreover, the results indicated that in an annual cycle or an ENSO cycle, when the local precipitation frequencies increase, the occurrence frequencies of all kinds of rain clouds will increase. However, among those precipitating systems, the proportions of ice-dominant and well-mixed clouds increases while that of water-dominant clouds decrease as the local precipitation increases. Anomalies of the opposite sign tend to accompany the decreasing precipitations situations. Overall, the classification method proves to be useful to extract objective information from observed emission and scattering signals. Shel McGuire Florida State University Academic Program Specialist Department of Earth, Ocean, & Atmospheric Science 1017 Academic Way, 410 Love Building (Meteorology) Tallahassee, FL 32306 850-644-8582 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Feb 20 10:18:16 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 20 Feb 2019 15:18:16 +0000 Subject: [Eoas-seminar] Meteorology MS Defense for Mengtao Yin, Thursday, March 7, 2019, 3:30 PM, LOV353 Message-ID: Meteorology Seminar Mengtao Yin PhD Meteorology Candidate Title: Understanding Microphysics of Snowflakes and Snow Precipitation Process Using Spaceborne Microwave Measurements Major Professor: Dr. Guosheng Liu Date: March 07, 2019 Time: 3:30 to 6:00 PM Location: Werner A. Baum Seminar Room (353 Love Building) (Please join us for refreshments served outside room 353 Love @ 3:00 PM) ABSTRACT Snow, another precipitation form besides rain, affects the Earth's climate distinctly by modifying hydrological and radiative processes. The radiative properties of nonspherical snowflakes are much more complicated than their spherical counterparts, raindrops. Snowflakes with different structures tend to have different scattering properties. Thus, it is important for us to increase the knowledge in falling snow. However, only a few sensors have been available so far that can provide global snowfall measurements including those onboard he Global Precipitation Measurement (GPM) core observatory and the CloudSat satellites. The GPM satellite carries two important instruments for studying snow precipitations, i.e., the Dual-frequency Precipitation Radar (DPR) and the GPM Microwave Imager (GMI). By combining the GPM instruments with another active sensor onboard the CloudSat satellite, the Cloud Profiling Radar (CPR), an unprecedented opportunity arises for understanding the microphysics of snowflakes and the physical processes of snow precipitation. Seizing this opportunity, in this study, we firstly investigate the microphysical properties of snow particles by analyzing their backscattered signatures at different frequencies. Then, the accuracy of simulating passive microwave brightness temperatures at high frequencies is examined under snowfall conditions using the CPR derived snow water content profiles as radiative transfer model inputs. Lastly, a passive microwave snowfall retrieval method is developed in which the a priori database is optimized by tuning snow water content profiles to be consistent with the GMI observations. This research explores the application of spaceborne microwave measurements to snowfall studies by combining CloudSat and GPM instruments. It provides new knowledge on snowflake microphysics and applicable methods in retrieving three-dimensional snow water distribution from passive high frequency microwave measurements. Please see attachment for full abstract. Shel McGuire Florida State University Academic Program Specialist Department of Earth, Ocean, & Atmospheric Science 1017 Academic Way, 410 Love Building (Meteorology) Tallahassee, FL 32306 850-644-8582 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: abstract.docx Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document Size: 14521 bytes Desc: abstract.docx URL: From eoas-seminar at lists.fsu.edu Fri Feb 22 07:38:37 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 22 Feb 2019 07:38:37 -0500 Subject: [Eoas-seminar] EOAS Colloquium today CAR 101 at 3:30 pm Message-ID: Colloquium: CAR 101 at 3:30 p.m. Paroxysmal Deccan Eruptions and Climate Change cause End-Cretaceous Mass Extinction Gerta Keller, Princeton University Deccan volcanism and the Chicxulub impact are both linked to the end-Cretaceous mass extinction. The timing of these events relative to the mass extinction has long remained controversial. Mercury (Hg) anomalies from atmospheric fallout of Deccan eruptions in stratigraphic records provide a potential tool to discern the effects of volcanism versus impactor. The high-resolution Hg record from the astronomically-tuned Elles section (Tunisia), correlated with U-Pb geochronology of Deccan volcanism provides a robust proxy for Deccan volcanism. The time-resolved Hg record reveals massive volcanic eruptions (~30% of total Deccan volume) over the last 45 ky of the Maastrichtian ending with paroxysmal eruptions during the last 25 ky accompanied by ocean acidification and hyperthermal warming ending with the mass extinction. Recent speculations that the Chicxulub impact triggered a state shift in Deccan eruptions ~70 ky pre-KPB causing the mass extinction are unconfirmed and evidence for an impact coinciding with the mass extinction is lacking. (Science Feb. 21, 2019). Just released in Science this morning is a set of papers on the chronology of the Deccan, some of which Gerta will speak about in her seminar this afternoon. Gerta?s paper is attached below. Munir Humayun Professor Department of Earth, Ocean, and Atmospheric Science & National High Magnetic Field Laboratory Florida State University 1800 E. Paul Dirac Drive Tallahassee, FL32310 (850) 644-1908 (850) 644-0827 (FAX) -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Schoene 2019.pdf Type: application/pdf Size: 1410305 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Feb 25 12:10:36 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 25 Feb 2019 17:10:36 +0000 Subject: [Eoas-seminar] Geology Thesis Defense - Megan Shelfer - March 8, 10:00 - 104CAR Message-ID: Title: Humicrete in Northwest Florida: An Analysis of Formation and Characteristics Major Professor: Steven Kish -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Feb 25 15:57:34 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 25 Feb 2019 20:57:34 +0000 Subject: [Eoas-seminar] EOAS Colloquium this Friday at 3:30 in CAR 101 Message-ID: This week's EOAS colloquium speaker will be: Dr Peter Weiss University of California, Santa Cruz Atmospheric methylmercury: from the ocean to fog to bioaccumulation in coastal terrestrial apex predators in California Coastal upwelling of ocean water can result in a sea-air flux of the potent yet highly reactive neurotoxin dimethylmercury. Marine stratus clouds are commonly present over the Pacific Ocean off the coast of California during the seasons when upwelling is active (spring and summer). These clouds act as an efficient absorber of dimethylmercury and also of airborne monomethylmercury that may arise from sea spray. As these clouds advect onto land and deposit water as fog drip, they can transfer significant quantities of methylmercury to terrestrial ecosystems. This talk will describe the research that has been conducted since 2011 to quantify methylmercury in fog and marine stratus clouds, and its possible sources and sinks. An investigation of the mercury burdens in the coastal terrestrial food web will also be presented. These results show that methylmercury concentrations in the California mountain lion, mule deer, and lichen (a deer food) are significantly elevated in samples taken from a fog-inundated coastal forest area versus inland areas with no fog. This suggests that while fog drip is a small portion of the hydrologic inputs, the methylmercury it contains may play a disproportionate role in bioaccumulation of mercury in coastal terrestrial food webs. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Feb 26 10:55:45 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 26 Feb 2019 15:55:45 +0000 Subject: [Eoas-seminar] Oceanography Thesis Defense - Linoj Vijayan Nair Rugminiamma - March 5, 1:30p - 18KEN Message-ID: Title: Experimental and numerical investigations on source driven rotating flow in a basin with topography Major Professor: Kevin Speer -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Feb 26 16:23:17 2019 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 26 Feb 2019 21:23:17 +0000 Subject: [Eoas-seminar] Meteorology MS Defense for Jiangmei Li, Tuesday, March 5, 2019, 3:30 PM, LOV353 Message-ID: Meteorology Seminar Jiangmei Li M.S. Meteorology Candidate Title: Classification of rain clouds based on the relationship between microwave emission and scattering signals Major Professor: Guosheng Liu Date: March 5, 2019 Time: 3:30 - 5:00 PM Location: Werner A. Baum Seminar Room (353 Love Building) (Please join us for refreshments served outside room 353 Love @ 3:00 PM) ABSTRACT In this thesis, we introduce a new approach to classify rain clouds based on the relationship between the emission signal and scattering signal derived from microwave brightness temperature data. Two parameters are used as indicators of emission signal and scattering signal respectively: one is the polarization difference (D) at 19 GHz, and the other one is the polarization-corrected temperature (PCT) at high-frequencies channels. D is related to the emission of liquid hydrometeors, and PCT mainly reflects the brightness temperature depression due to the scattering by ice particles. Both D and PCT decrease with increasing precipitation rate. Therefore, certain combinations of D and PCT can be regarded as the representatives of cloud hydrometeor structures. Based on the D-PCT relationship investigated in this study, we classified the observed rain clouds into five categories-non-precipitating, light-precipitating, liquid-dominant precipitating, well-mix precipitating, and ice-dominant precipitating cloud. We verified the results of the classification of different precipitation cases over tropical regions. For both the hurricane and front cases, the results show that the distributions of categorized cloud pixels can reflect the horizontal structure of the weather systems. The monthly gridded mean frequencies of categorized precipitating clouds are used to analyze the relationship between the seasonal and interannual cycles of tropical precipitation and clouds' hydrometeor components. Moreover, the results indicated that in an annual cycle or an ENSO cycle, when the local precipitation frequencies increase, the occurrence frequencies of all kinds of rain clouds will increase. However, among those precipitating systems, the proportions of ice-dominant and well-mixed clouds increases while that of water-dominant clouds decrease as the local precipitation increases. Anomalies of the opposite sign tend to accompany the decreasing precipitations situations. Overall, the classification method proves to be useful to extract objective information from observed emission and scattering signals. Shel McGuire Florida State University Academic Program Specialist Department of Earth, Ocean, & Atmospheric Science 1017 Academic Way, 410 Love Building (Meteorology) Tallahassee, FL 32306 850-644-8582 -------------- next part -------------- An HTML attachment was scrubbed... URL: