From eoas-seminar at lists.fsu.edu Mon Apr 1 09:33:58 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 1 Apr 2024 13:33:58 +0000 Subject: [Eoas-seminar] Congratulations Danny Goddard Message-ID: EOAS Colleagues, Students, and Friends, It is a joy and honor for me to announce that Danny Goddard is a recipient of one of this year?s very few University Teaching Awards for Foundational Course Excellence. To quote the award letter, ? You were selected by a committee of faculty and students who reviewed this year?s nominations and supporting materials. The University Teaching Awards recognize teaching excellence as multi-faceted, involving areas such as serving as a positive role model to students, imparting a respect for truth and a love of learning, challenging students? thinking and assumptions, demonstrating respect for all persons, and employing innovative instructional techniques.? The award will be presented during a reception on the evening of April 23 in the Turnbull Center. Congratulations Danny! Bob Hart -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Apr 1 13:33:06 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 1 Apr 2024 17:33:06 +0000 Subject: [Eoas-seminar] Congratulations Vincent Salters Message-ID: EOAS Colleagues and Friends, Congratulations to Vincent Salters for being selected for the Fulbright U.S. Scholar award to Germany in Academic Year 2024-2025. The selection letter received by Salters is signed by Donna Brazille and states: "The United States Department of State's Bureau of Educational and Cultural Affairs, which oversees Fulbright Program operations throughout the world, joins the Board in congratulating you. We hope your Fulbright experience will be deeply rewarding professionally and personally, and that you will share the knowledge and experience you gain with many others throughout your life." Congratulations again, Vincent. Bob -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Apr 1 18:09:35 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 1 Apr 2024 22:09:35 +0000 Subject: [Eoas-seminar] Congratulations Mainak Mookherjee Message-ID: EOAS Colleagues and Friends, Congratulations to Mainak Mookherjee for being selected for the Fulbright U.S. Scholar award to India in Academic Year 2024-2025. The selection letter received by Mookherjee is signed by Donna Brazille and states: "The United States Department of State's Bureau of Educational and Cultural Affairs, which oversees Fulbright Program operations throughout the world, joins the Board in congratulating you. We hope your Fulbright experience will be deeply rewarding professionally and personally, and that you will share the knowledge and experience you gain with many others throughout your life." Congratulations again Mainak. Bob Hart -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Apr 5 09:01:12 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 5 Apr 2024 13:01:12 +0000 Subject: [Eoas-seminar] MET Seminar - Thursday April 11 - Prof. Sara Shamekh (NYU) Message-ID: Dear all, Please join us next Thursday April 11 for a Meteorology seminar given by Prof. Sara Shamekh from NYU. she will speak about ?Toward a better representation of atmospheric processes using machine learning? (abstract below) Prof. Shamekh will be joining us virtually, but we will still gather together in EOA 1044. If you have a medical excuse or other approved work off-campus, please contact Allison Wing (awing at fsu.edu) for the Zoom link. Otherwise we look forward to seeing everyone in 1044. Prof. Shamekh is also available for individual Zoom meetings on Thursday after the seminar. If you?d like to meet with her, please contact Allison Wing. DATE: Thursday April 11 SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM SEMINAR LOCATION: EOA 1044 (Speaker remote) SPEAKER: Prof. Sara Shamekh TITLE: Toward a better representation of atmospheric processes using machine learning ABSTRACT: As the impact of climate change poses an urgent concern for the future of our planet and all its inhabitants, it's crucial that we accurately understand and model this complex system. By doing so, we can develop the ability to take action towards adapting to the impact of climate change. Climate models are important tools for understanding and predicting global and regional climate change, yet they exhibit key uncertainties that limit their applicability to future projections. Uncertainties in climate models partly originate from a poor or lacking representation of physical processes too small to be resolved by models, such as atmospheric boundary layer turbulence or clouds. Machine learning has the ability to capture nonlinear structures and relationships within complex data and, when combined with traditional physical models, can lead to a better representation of physical processes and provide new insights into atmospheric processes. In this talk, I will discuss few examples that highlight the potential of machine learning (ML) combined with physics and the new discoveries made possible through this framework. The first example uses reduced-order models to accurately represent vertical turbulent fluxes in the atmospheric boundary layer across turbulent regimes. The architecture of this model, in which I enforce a physical constraint, allows clear interpretability and discovery of the main modes of turbulent transport. I then compare this model with an ML-enhanced eddy-diffusivity-mass-flux parameterization (a typical conventional parameterization of atmospheric boundary layer) to demonstrate how machine-discovered modes of variability may differ from the conventional ones. I then discuss how to incorporate the spatial pattern of a field into a parameterization in order to address some of their limiting assumptions. These examples show the promise of ML in advancing our understanding and modeling of physical processes in the earth system. Despite these successes, many challenges remain to be addressed and many questions to be answered, making the future of this interdisciplinary area exciting. We look forward to seeing you there! Cheers, Allison -------------------------------------------- Allison A. Wing, Ph.D. Werner A. and Shirley B. Baum Professor Associate Professor, Department of Earth, Ocean, and Atmospheric Science Florida State University awing at fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Apr 10 14:54:09 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 10 Apr 2024 14:54:09 -0400 Subject: [Eoas-seminar] Reminder - Carothers Lecture Mon April 15 In-Reply-To: References: Message-ID: Our next Carothers lecture is on Monday, April 15, when Mariana Fuentes, Associate Professor, Earth, Ocean, & Atmospheric Science, College of Arts and Sciences, will speak to us about "Opportunities for Conserving Marine Species in a Changing World: A Case Study with Sea Turtles." I've attached a flyer for the lecture to this email, and the direct link to the sign-up page for the luncheon is online here: https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.research.fsu.edu%2Fresearch-offices%2Ford%2Fmilton-carothers-lecture-series%2Fmilton-carothers-lecture-registration-april-2024%2F&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C997dde62b3cb4c45fc5a08dc598f9c18%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638483720532151074%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=NbxpwZoTYboy5oBz2kcKzCy3KVEfr924PVSQloGQJLs%3D&reserved=0 -------------- next part -------------- A non-text attachment was scrubbed... Name: fuentes_flyer.pdf Type: application/pdf Size: 1453323 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Thu Apr 11 09:32:50 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 11 Apr 2024 13:32:50 +0000 Subject: [Eoas-seminar] MET Seminar - TODAY - Prof. Sara Shamekh (NYU) In-Reply-To: References: Message-ID: Dear all, This is a reminder of today's MET seminar, given by Prof Sara Shamekh on Toward a better representation of atmospheric processes using machine learning. Snacks at 3, talk at 3:15 - see you in 1044! Email Allison Wing before 2:30 if you need the Zoom link. Cheers, Allison Get Outlook for iOS ________________________________ From: Eoas-seminar on behalf of eoas-seminar--- via Eoas-seminar Sent: Friday, April 5, 2024 9:01 AM To: eoas-seminar--- via Eoas-seminar Cc: info at coaps.fsu.edu Subject: [Eoas-seminar] MET Seminar - Thursday April 11 - Prof. Sara Shamekh (NYU) Dear all, Please join us next Thursday April 11 for a Meteorology seminar given by Prof. Sara Shamekh from NYU. she will speak about ?Toward a better representation of atmospheric processes using machine learning? (abstract below) Prof. Shamekh will be joining us virtually, but we will still gather together in EOA 1044. If you have a medical excuse or other approved work off-campus, please contact Allison Wing (awing at fsu.edu) for the Zoom link. Otherwise we look forward to seeing everyone in 1044. Prof. Shamekh is also available for individual Zoom meetings on Thursday after the seminar. If you?d like to meet with her, please contact Allison Wing. DATE: Thursday April 11 SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM SEMINAR LOCATION: EOA 1044 (Speaker remote) SPEAKER: Prof. Sara Shamekh TITLE: Toward a better representation of atmospheric processes using machine learning ABSTRACT: As the impact of climate change poses an urgent concern for the future of our planet and all its inhabitants, it's crucial that we accurately understand and model this complex system. By doing so, we can develop the ability to take action towards adapting to the impact of climate change. Climate models are important tools for understanding and predicting global and regional climate change, yet they exhibit key uncertainties that limit their applicability to future projections. Uncertainties in climate models partly originate from a poor or lacking representation of physical processes too small to be resolved by models, such as atmospheric boundary layer turbulence or clouds. Machine learning has the ability to capture nonlinear structures and relationships within complex data and, when combined with traditional physical models, can lead to a better representation of physical processes and provide new insights into atmospheric processes. In this talk, I will discuss few examples that highlight the potential of machine learning (ML) combined with physics and the new discoveries made possible through this framework. The first example uses reduced-order models to accurately represent vertical turbulent fluxes in the atmospheric boundary layer across turbulent regimes. The architecture of this model, in which I enforce a physical constraint, allows clear interpretability and discovery of the main modes of turbulent transport. I then compare this model with an ML-enhanced eddy-diffusivity-mass-flux parameterization (a typical conventional parameterization of atmospheric boundary layer) to demonstrate how machine-discovered modes of variability may differ from the conventional ones. I then discuss how to incorporate the spatial pattern of a field into a parameterization in order to address some of their limiting assumptions. These examples show the promise of ML in advancing our understanding and modeling of physical processes in the earth system. Despite these successes, many challenges remain to be addressed and many questions to be answered, making the future of this interdisciplinary area exciting. We look forward to seeing you there! Cheers, Allison -------------------------------------------- Allison A. Wing, Ph.D. Werner A. and Shirley B. Baum Professor Associate Professor, Department of Earth, Ocean, and Atmospheric Science Florida State University awing at fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Apr 11 16:26:51 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 11 Apr 2024 20:26:51 +0000 Subject: [Eoas-seminar] Physical Oceanography seminar "The Southern Ocean in a Warming Climate" by Qian Li - Monday April 15 at 1:30pm in EOAS 6042 Message-ID: Please join us for a seminar by Physical Oceanography candidate Qian Li Monday April 15 at 1:30pm in EOAS 6042. The Southern Ocean in a Warming Climate In a warming climate, the Antarctic ice sheet has been losing mass to the ocean at an accelerating rate. The Antarctic sea ice extent has taken a regime shift from relatively gradual increases to rapid decreases. Concurrently, the Southern Ocean circulation has been changing. Yet, the mechanisms controlling the long-term polar ice-ocean interaction remain unclear. In this talk, I will first use a high-resolution (~0.1?) global ocean?sea-ice model to show the critical importance of Antarctic meltwater in influencing future trends in the abyssal ocean overturning circulation and properties. Rapid melting freshens the surface ocean and strengthens the stratification, preventing the formation of dense shelf water and Antarctic Bottom Water (AABW). A slowdown in the sinking of AABW results in warming and ageing of the abyssal ocean, with implications for global ocean biogeochemistry and climate that could last for centuries. Second, in the framework of residual-mean theory, I will show a two-time-scale response of the Southern Ocean overturning circulation to westerly winds. The essentially white-noise forcing by westerly winds triggers high-frequency fluctuations of the ocean?s overturning circulation. The oceanic eddy-driven component, instead, responds on decadal timescales, leading to the ocean heat transport convergence into the seasonal ice zone and a decadal decrease in sea ice extent. It suggests that the rapid decline in Antarctic sea ice observed in recent years may be part of natural variability and not necessarily associated with anthropogenic climate change. --- 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 Thu Apr 11 17:33:38 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 11 Apr 2024 21:33:38 +0000 Subject: [Eoas-seminar] MET Seminar - Thursday April 18 - Dr. Chanil Park (Boston College) Message-ID: Dear all, Please join us next Thursday April 18 for a Meteorology seminar given by Dr. Chanil Park from Boston College. He will speak about "The multiscale nature of atmospheric rivers" (abstract below) Dr. Park will be giving the seminar in person in EOAS 1044. If you have a medical excuse or other approved work off-campus, please contact Chelsea Nam (ccnam at fsu.edu) for the Zoom link. Dr. Park is available for individual meetings on Thursday. If you'd like to meet with him, please contact Chelsea Nam. DATE: Thursday April 18 SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM SEMINAR LOCATION: EOA 1044 (Speaker in-person) SPEAKER: Dr. Chanil Park TITLE: The multiscale nature of atmospheric rivers ABSTRACT: Atmospheric rivers (ARs) are the filamentary regions of intense water vapor transport and play a crucial role in regional/global hydrological cycles and local precipitation extremes. The Glossary of the American Meteorological Society describes the AR as ?a long, narrow, and transient corridor of strong horizontal water vapor transport that is typically associated with a low-level jet stream ahead of the cold front of an extratropical cyclone?. In this talk, it will be argued that what we have called ARs do not follow the same one. This is exemplified first by depicting several AR cases with different parent weather systems and then generalized by using a multiscale index which allows stratifying ARs by the relative importance of high- (HF; periods<10 days) and low-frequency (LF; periods>10 days) moisture transports. The results show that ARs are associated not only with HF weather systems (i.e., extratropical cyclones) but also with different types of LF anomalies with spatial-seasonally varying fractional contributions. Moreover, ARs with a larger LF contribution are locally more persistent and thus potentially more hazardous. The multiscale analysis provides valuable insight into AR diversity, which may improve our understanding of their impacts, variabilities, and future changes. In the end, I will briefly introduce the ongoing study explaining that ARs in East Asia summer are the continuum of extratropical (HF) and monsoonal (LF) moisture plumes. We look forward to seeing you there! --------------- Chaehyeon Chelsea Nam, Ph.D. Assistant Professor Department of Earth, Ocean, and Atmospheric Science (EOAS) Florida State University RM 5011, ccnam at fsu.edu https://chelsea-nam.github.io/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Sun Apr 14 15:56:14 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sun, 14 Apr 2024 19:56:14 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Anter El-Azab Message-ID: "DFT-Informed Kinetic Monte Carlo Simulation of Growth of Multiphase Thin Films" Anter El-Azab School of Materials Engineering Purdue University Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic. All are welcome to attend. NOTE: In-person attendance is requested. Zoom access is intended for external (non-departmental) participants only. https://fsu.zoom.us/j/94273595552 Meeting # 942 7359 5552 Colloquium recordings will be made available here, https://www.sc.fsu.edu/colloquium Wednesday, Apr 17, 2024, Schedule: * 3:00 to 3:30 PM Eastern Time (US and Canada) ? Nespresso & Teatime - 417 DSL Commons * 3:30 to 4:30 PM Eastern Time (US and Canada) Colloquium - 499 DSL Seminar Room Abstract: Multiphase thin films grown via Pulsed Laser Deposition (PLD) technique have gained a significant attention in recent years due to their unique physical functionalities. In films with pillar-in-matrix configurations, vertical interfaces induce interesting physical, optical and chemical properties. Despite extensive experimental reports on multiphase film growth, a theoretical comprehension of the growth mechanisms and the influence of structure on properties is still lacking. In the case of growth morphology, it is known that both kinetic and thermodynamic factors are important but the relative roles of these factors are not yet understood. In this seminar, we report on a recently developed multiscale computational model of film growth. This model is based on kinetic Monte Carlo (kMC) simulation of film deposition and growth that is informed by Density Functional Theory (DFT) parameterization of diffusion and bonding energetics, and a continuum solution of the elastic strain arising from mismatch in the heterogeneous film system. The elastic problem resulting from lattice and thermal mismatch between the substrate, matrix and pillar materials is cast in the form of Representative Volume Element (RVE) with average constraints and solved using Fast Fourier Transform (FFT). The kMC simulations reveal the impact of the PLD growth conditions on the output morphology. Furthermore, DFT investigations of the impact of strain on the bonding and diffusion of adatoms/molecules on the surfaces reveal that the local strain can play a significant role in the phase separation mechanism of oxide-metal systems. The simulations are performed for Au-CeO2 film system deposited on SrTiO3 (001) substrate. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1801-colloquium-with-anter-el-azab-2024-04-17 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 5595 bytes Desc: not available URL: -------------- next part -------------- _______________________________________________ SC-Seminar-announce mailing list SC-Seminar-announce at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/sc-seminar-announce From eoas-seminar at lists.fsu.edu Sun Apr 14 23:49:10 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 15 Apr 2024 03:49:10 +0000 Subject: [Eoas-seminar] Reminder: Physical Oceanography seminar "The Southern Ocean in a Warming Climate" by Qian Li - Monday April 15 at 1:30pm in EOAS 6042 In-Reply-To: References: Message-ID: ________________________________ From: Eric Chassignet Sent: Thursday, April 11, 2024 4:26 PM To: eoas-seminar at lists.fsu.edu Cc: seminar at coaps.fsu.edu Subject: Physical Oceanography seminar "The Southern Ocean in a Warming Climate" by Qian Li - Monday April 15 at 1:30pm in EOAS 6042 Please join us for a seminar by Physical Oceanography candidate Qian Li Monday April 15 at 1:30pm in EOAS 6042. The Southern Ocean in a Warming Climate In a warming climate, the Antarctic ice sheet has been losing mass to the ocean at an accelerating rate. The Antarctic sea ice extent has taken a regime shift from relatively gradual increases to rapid decreases. Concurrently, the Southern Ocean circulation has been changing. Yet, the mechanisms controlling the long-term polar ice-ocean interaction remain unclear. In this talk, I will first use a high-resolution (~0.1?) global ocean?sea-ice model to show the critical importance of Antarctic meltwater in influencing future trends in the abyssal ocean overturning circulation and properties. Rapid melting freshens the surface ocean and strengthens the stratification, preventing the formation of dense shelf water and Antarctic Bottom Water (AABW). A slowdown in the sinking of AABW results in warming and ageing of the abyssal ocean, with implications for global ocean biogeochemistry and climate that could last for centuries. Second, in the framework of residual-mean theory, I will show a two-time-scale response of the Southern Ocean overturning circulation to westerly winds. The essentially white-noise forcing by westerly winds triggers high-frequency fluctuations of the ocean?s overturning circulation. The oceanic eddy-driven component, instead, responds on decadal timescales, leading to the ocean heat transport convergence into the seasonal ice zone and a decadal decrease in sea ice extent. It suggests that the rapid decline in Antarctic sea ice observed in recent years may be part of natural variability and not necessarily associated with anthropogenic climate change. --- 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 Mon Apr 15 09:17:17 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 15 Apr 2024 09:17:17 -0400 Subject: [Eoas-seminar] EOAS colloquium, Friday April 19, 3pm Message-ID: Dear all, Please join us this coming Friday April 19 for an EOAS colloquium given by Dr. Xiaoming Wang from Los Angeles County Museum of Natural History. Title: Vertebrate Fossils in High Tibet and Adaptation in Extreme Environment. Time: 3 pm Friday, April 19th Location: 1050 EOA Abstract: The Tibetan Plateau is a study in contrasts and extremes. It has the world's tallest mountain ranges in the Himalayas and it has some of the most unique environments with arctic-like climate, thin air, high summer radiation, and in places, arid terrains. These harsh environments are often impediments to scientific explorations. Over the last 30 years, my team of paleontologists and geologists has explored Tibet for vertebrate fossils dating back up to 20 million years and its paleoenvironments. Our surprising discoveries of ancestral woolly rhinos and swollen-boned fishes suggest that harsh environments served as a major driver of vertebrate evolution. Tibet also forms sharp zoogeographic boundaries with the surrounding regions and serves as a cradle of evolution for Ice Age megafauna in Eurasia. If you would like to meet with the speaker on Friday, either before or after the colloquium, please email Yang Wang (ywang at magnet.fsu.edu ). We look forward to seeing you there! Cheers, Yang Yang Wang Professor Department of Earth, Ocean and Atmospheric Science Florida State University 1011 Academic Way-5005M Tallahassee, FL 32306-4520 Phone: 850-644-1121 http://www.eoas.fsu.edu/people/faculty/dr-yang-wang Google Scholar: http://scholar.google.com/citations?user=uN9mVUoAAAAJ&hl=en Geochemistry Program National High Magnetic Field Laboratory 1800 E Paul Dirac Drive Tallahassee, FL 32310-3706 Phone: 850-644-1121 Fax: 850-644-0827 Office: B327 E-mail: ywang at magnet.fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: EOAS-Seminar-4-19-2024.pdf Type: application/pdf Size: 293559 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 1430 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Mon Apr 15 13:26:30 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 15 Apr 2024 17:26:30 +0000 Subject: [Eoas-seminar] Reminder: Physical Oceanography seminar "The Southern Ocean in a Warming Climate" by Qian Li - Monday April 15 at 1:30pm in EOAS 6042 In-Reply-To: References: Message-ID: Seminar in 5 minutes. 6th floor 6042 On Apr 14, 2024, at 11:49?PM, eoas-seminar--- via Eoas-seminar wrote: ? ________________________________ From: Eric Chassignet Sent: Thursday, April 11, 2024 4:26 PM To: eoas-seminar at lists.fsu.edu Cc: seminar at coaps.fsu.edu Subject: Physical Oceanography seminar "The Southern Ocean in a Warming Climate" by Qian Li - Monday April 15 at 1:30pm in EOAS 6042 Please join us for a seminar by Physical Oceanography candidate Qian Li Monday April 15 at 1:30pm in EOAS 6042. The Southern Ocean in a Warming Climate In a warming climate, the Antarctic ice sheet has been losing mass to the ocean at an accelerating rate. The Antarctic sea ice extent has taken a regime shift from relatively gradual increases to rapid decreases. Concurrently, the Southern Ocean circulation has been changing. Yet, the mechanisms controlling the long-term polar ice-ocean interaction remain unclear. In this talk, I will first use a high-resolution (~0.1?) global ocean?sea-ice model to show the critical importance of Antarctic meltwater in influencing future trends in the abyssal ocean overturning circulation and properties. Rapid melting freshens the surface ocean and strengthens the stratification, preventing the formation of dense shelf water and Antarctic Bottom Water (AABW). A slowdown in the sinking of AABW results in warming and ageing of the abyssal ocean, with implications for global ocean biogeochemistry and climate that could last for centuries. Second, in the framework of residual-mean theory, I will show a two-time-scale response of the Southern Ocean overturning circulation to westerly winds. The essentially white-noise forcing by westerly winds triggers high-frequency fluctuations of the ocean?s overturning circulation. The oceanic eddy-driven component, instead, responds on decadal timescales, leading to the ocean heat transport convergence into the seasonal ice zone and a decadal decrease in sea ice extent. It suggests that the rapid decline in Antarctic sea ice observed in recent years may be part of natural variability and not necessarily associated with anthropogenic climate change. --- 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 _______________________________________________ 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: From eoas-seminar at lists.fsu.edu Tue Apr 16 14:00:27 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 16 Apr 2024 18:00:27 +0000 Subject: [Eoas-seminar] Seminar this Friday at 10:45am in EOAS 6042 by Zihua Liu on "Life cycle of internal waves and potential implementation in the Arctic Ocean" Message-ID: Seminar this Friday April 19 at 10:45am in EOAS 6042 by Physical Oceanography faculty candidate Zihua Liu. Please note the odd starting time of 10:45am in EOAS 6042. This is to ensure we can vacate the room promptly at noon for a class. The title and abstract of her seminar are as follows: "Life cycle of internal waves and potential implementation in the Arctic Ocean" Internal waves are ubiquitous in the ocean, playing a crucial role by facilitating energy transfer and vertical mixing, which regulate water properties and large-scale circulations. These waves enhance nutrient transport that supports marine life and influences the dis- tribution and behavior of marine organisms, impacting overall oceanic productivity and ecological dynamics. We studied the generation and evolution of internal waves on the continental shelf in order to better understand their life cycle. For the generation, horizon- tal distribution of the barotropic-to-baroclinic energy conversion has been widely studied to examine the generation of internal tides. The vertical structure that provides insights into the dynamics of conversion, however, is masked by this depth-integrated energy con- version. We reveal the vertical profile of energy conversion by employing an idealized ocean model in a slope-shelf context forced by M2 barotropic tide. The model shows two vertically separated hotspots of energy conversion, near the sloping bottom and at the pycnocline. The generated internal tidal beams can incident onto a continental shelf, and then its transition into modal internal tides, and the subsequent generation of on- shore propagating internal solitary waves are investigated. Understanding characteristics of internal waves can help us explore their impacts. From recent acoustic observations, we found that the movement of mesopelagic fish is driven by internal waves, which was unknown before. --- 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 Wed Apr 17 11:37:42 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 17 Apr 2024 15:37:42 +0000 Subject: [Eoas-seminar] TOMORROW (3:15 pm) MET Seminar - Dr. Chanil Park In-Reply-To: References: Message-ID: Dear all, We will have Dr. Chanil Park of Boston College visiting us for the MET seminar tomorrow. Dr. Park is an expert in synoptic meteorology, especially on atmospheric river phenomena. Chanil's website: https://sites.google.com/view/chanil-weather/about-me?authuser=0 There are still some open slots for in-person meetings with Dr. Park, so if you're interested in meeting with him, let me know. I hope many of you can join the seminar tomorrow! Best, Chelsea ----------- DATE: Thursday April 18 SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM SEMINAR LOCATION: EOA 1044 (Speaker in-person) SPEAKER: Dr. Chanil Park TITLE: The multiscale nature of atmospheric rivers ABSTRACT: Atmospheric rivers (ARs) are the filamentary regions of intense water vapor transport and play a crucial role in regional/global hydrological cycles and local precipitation extremes. The Glossary of the American Meteorological Society describes the AR as ?a long, narrow, and transient corridor of strong horizontal water vapor transport that is typically associated with a low-level jet stream ahead of the cold front of an extratropical cyclone?. In this talk, it will be argued that what we have called ARs do not follow the same one. This is exemplified first by depicting several AR cases with different parent weather systems and then generalized by using a multiscale index which allows stratifying ARs by the relative importance of high- (HF; periods<10 days) and low-frequency (LF; periods>10 days) moisture transports. The results show that ARs are associated not only with HF weather systems (i.e., extratropical cyclones) but also with different types of LF anomalies with spatial-seasonally varying fractional contributions. Moreover, ARs with a larger LF contribution are locally more persistent and thus potentially more hazardous. The multiscale analysis provides valuable insight into AR diversity, which may improve our understanding of their impacts, variabilities, and future changes. In the end, I will briefly introduce the ongoing study explaining that ARs in East Asia summer are the continuum of extratropical (HF) and monsoonal (LF) moisture plumes. We look forward to seeing you there! --------------- Chaehyeon Chelsea Nam, Ph.D. Assistant Professor Department of Earth, Ocean, and Atmospheric Science (EOAS) Florida State University RM 5011, ccnam at fsu.edu https://chelsea-nam.github.io/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Apr 18 09:17:27 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 18 Apr 2024 09:17:27 -0400 Subject: [Eoas-seminar] Fwd: Reminder: EOAS colloquium, Friday April 19, 3pm References: Message-ID: Dear All, A gentle reminder: Dr. Xiaoming Wang will present the EOAS Colloquium at 3:00 pm in EOA1050 tomorrow (see attached flyer). Attached is a schedule for Dr. Wang?s visit. If you would like to meet with him or go to dinner with him, please email Yang Wang (ywang at magnet.fsu.edu ). Thanks! Hope to see you at the colloquium. Best, Yang > Begin forwarded message: > > From: eoas-seminar--- via Eoas-seminar > Subject: [Eoas-seminar] EOAS colloquium, Friday April 19, 3pm > Date: April 15, 2024 at 9:17:17?AM EDT > To: eoas-seminar at lists.fsu.edu > Cc: Gregory M Erickson , Xiaoming Wang , "GaboardiCalhoun, Mabry" > Reply-To: eoas-seminar at lists.fsu.edu > > Dear all, > Please join us this coming Friday April 19 for an EOAS colloquium given by Dr. Xiaoming Wang from Los Angeles County Museum of Natural History. > Title: Vertebrate Fossils in High Tibet and Adaptation in Extreme Environment. > Time: 3 pm Friday, April 19th > Location: 1050 EOA > Abstract: The Tibetan Plateau is a study in contrasts and extremes. It has the world's tallest mountain ranges in the Himalayas and it has some of the most unique environments with arctic-like climate, thin air, high summer radiation, and in places, arid terrains. These harsh environments are often impediments to scientific explorations. Over the last 30 years, my team of paleontologists and geologists has explored Tibet for vertebrate fossils dating back up to 20 million years and its paleoenvironments. Our surprising discoveries of ancestral woolly rhinos and swollen-boned fishes suggest that harsh environments served as a major driver of vertebrate evolution. Tibet also forms sharp zoogeographic boundaries with the surrounding regions and serves as a cradle of evolution for Ice Age megafauna in Eurasia. > > If you would like to meet with the speaker on Friday, either before or after the colloquium, please email Yang Wang (ywang at magnet.fsu.edu ). > We look forward to seeing you there! > Cheers, > Yang > ? Yang Wang Professor Department of Earth, Ocean and Atmospheric Science Florida State University 1011 Academic Way-5005M Tallahassee, FL 32306-4520 Phone: 850-644-1121 http://www.eoas.fsu.edu/people/faculty/dr-yang-wang Google Scholar: http://scholar.google.com/citations?user=uN9mVUoAAAAJ&hl=en Geochemistry Program National High Magnetic Field Laboratory 1800 E Paul Dirac Drive Tallahassee, FL 32310-3706 Phone: 850-644-1121 Fax: 850-644-0827 Office: B327 E-mail: ywang at magnet.fsu.edu ? -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: EOAS-Seminar-4-19-2024.pdf Type: application/pdf Size: 293559 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: X-Wang Schedule-2024.pdf Type: application/pdf Size: 23581 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 1430 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Fri Apr 19 08:11:02 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 19 Apr 2024 12:11:02 +0000 Subject: [Eoas-seminar] MET Seminar - Thursday April 25 - Prof. Maria Molina (University of Maryland) Message-ID: Dear all, Please join us next Thursday April 25 for a Meteorology seminar given by Prof. Maria Molina of the University of Maryland. She will speak about ?Machine learning for Earth system prediction and predictability" (abstract below). Prof. Molina will be joining us in person. She is also available for individual meetings on Thursday. If you?d like to meet with her, please contact Allison Wing (awing at fsu.edu). As some of you may recall, Prof. Molina received her Bachelors degree in Meteorology from FSU in 2008, so she is particularly excited to catch up with some of her former professors. Graduate students, please join for lunch with the speaker at 12:15 PM on Thursday. Please RSVP to Allison Wing by the end of the day Tuesday. DATE: Thursday April 25 SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM SEMINAR LOCATION: EOA 1044 (Speaker in person) SPEAKER:Prof. Maria Molina TITLE: Machine learning for Earth system prediction and predictability ABSTRACT: Machine learning can be used for Earth system prediction, or to study our ability to make skillful predictions given the system's initial state or other factors, otherwise known as predictability. In traditional numerical weather prediction frameworks, we solve the governing partial differential equations starting from an initial state. This initialized prediction framework usually involves three stages: 1) generating the initial conditions of the Earth system, 2) running the mathematical representation of the system on a computer forward in time, and 3) analyzing the output and converting it into a format that is useful for end users. Machine learning can be used to improve each of these individual stages, or to circumvent the three stage framework altogether, and examples of each will be given in this seminar. More time during the seminar will be dedicated to the challenges surrounding subseasonal prediction, which focuses on lead times of three to four weeks, and how we can use machine learning to both uncover potential biases in our initialized prediction systems and how we can bias-correct them. We look forward to seeing you there! Cheers, Allison -------------------------------------------- Allison A. Wing, Ph.D. Werner A. and Shirley B. Baum Professor Associate Professor, Department of Earth, Ocean, and Atmospheric Science Florida State University awing at fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Apr 19 09:49:56 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 19 Apr 2024 13:49:56 +0000 Subject: [Eoas-seminar] Reminder: Seminar today at 10:45am in EOAS 6042 by Zihua Liu on "Life cycle of internal waves and potential implementation in the Arctic Ocean" In-Reply-To: References: Message-ID: Seminar this Friday April 19 at 10:45am in EOAS 6042 by Physical Oceanography faculty candidate Zihua Liu. Please note the odd starting time of 10:45am in EOAS 6042. This is to ensure we can vacate the room promptly at noon for a class. The title and abstract of her seminar are as follows: "Life cycle of internal waves and potential implementation in the Arctic Ocean" Internal waves are ubiquitous in the ocean, playing a crucial role by facilitating energy transfer and vertical mixing, which regulate water properties and large-scale circulations. These waves enhance nutrient transport that supports marine life and influences the dis- tribution and behavior of marine organisms, impacting overall oceanic productivity and ecological dynamics. We studied the generation and evolution of internal waves on the continental shelf in order to better understand their life cycle. For the generation, horizon- tal distribution of the barotropic-to-baroclinic energy conversion has been widely studied to examine the generation of internal tides. The vertical structure that provides insights into the dynamics of conversion, however, is masked by this depth-integrated energy con- version. We reveal the vertical profile of energy conversion by employing an idealized ocean model in a slope-shelf context forced by M2 barotropic tide. The model shows two vertically separated hotspots of energy conversion, near the sloping bottom and at the pycnocline. The generated internal tidal beams can incident onto a continental shelf, and then its transition into modal internal tides, and the subsequent generation of on- shore propagating internal solitary waves are investigated. Understanding characteristics of internal waves can help us explore their impacts. From recent acoustic observations, we found that the movement of mesopelagic fish is driven by internal waves, which was unknown before. --- 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 Fri Apr 19 11:01:47 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 19 Apr 2024 11:01:47 -0400 Subject: [Eoas-seminar] Fwd: Reminder: EOAS colloquium today at 3pm in EOA1050 References: Message-ID: > Begin forwarded message: > > From: eoas-seminar--- via Eoas-seminar > Subject: [Eoas-seminar] EOAS colloquium, Friday April 19, 3pm > Date: April 15, 2024 at 9:17:17?AM EDT > To: eoas-seminar at lists.fsu.edu > Cc: Gregory M Erickson , Xiaoming Wang , "GaboardiCalhoun, Mabry" > Reply-To: eoas-seminar at lists.fsu.edu > > Dear all, > Please join us this coming Friday April 19 for an EOAS colloquium given by Dr. Xiaoming Wang from Los Angeles County Museum of Natural History. > Title: Vertebrate Fossils in High Tibet and Adaptation in Extreme Environment. > Time: 3 pm Friday, April 19th > Location: 1050 EOA > Abstract: The Tibetan Plateau is a study in contrasts and extremes. It has the world's tallest mountain ranges in the Himalayas and it has some of the most unique environments with arctic-like climate, thin air, high summer radiation, and in places, arid terrains. These harsh environments are often impediments to scientific explorations. Over the last 30 years, my team of paleontologists and geologists has explored Tibet for vertebrate fossils dating back up to 20 million years and its paleoenvironments. Our surprising discoveries of ancestral woolly rhinos and swollen-boned fishes suggest that harsh environments served as a major driver of vertebrate evolution. Tibet also forms sharp zoogeographic boundaries with the surrounding regions and serves as a cradle of evolution for Ice Age megafauna in Eurasia. > > If you would like to meet with the speaker on Friday, either before or after the colloquium, please email Yang Wang (ywang at magnet.fsu.edu ). > We look forward to seeing you there! > Cheers, > Yang > ? > > > Yang Wang > Professor > Department of Earth, Ocean and Atmospheric Science > Florida State University > 1011 Academic Way-5005M > Tallahassee, FL 32306-4520 > Phone: 850-644-1121 > http://www.eoas.fsu.edu/people/faculty/dr-yang-wang > > Google Scholar: http://scholar.google.com/citations?user=uN9mVUoAAAAJ&hl=en > > Geochemistry Program > National High Magnetic Field Laboratory > 1800 E Paul Dirac Drive > Tallahassee, FL 32310-3706 > Phone: 850-644-1121 > Fax: 850-644-0827 > Office: B327 > E-mail: ywang at magnet.fsu.edu > > _______________________________________________ > Eoas-seminar mailing list > Eoas-seminar at lists.fsu.edu > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.fsu.edu%2Fmailman%2Flistinfo%2Feoas-seminar&data=05%7C02%7Cywang%40magnet.fsu.edu%7Cb77e54b8d7f44bc9447008dc5d5281af%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638487856165130936%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=VNaF19ES1FUztqNzAGOxomtCcSZaAqa4onMqwYy4sTY%3D&reserved=0 Yang Wang Professor Department of Earth, Ocean and Atmospheric Science Florida State University 1011 Academic Way-5005M Tallahassee, FL 32306-4520 Phone: 850-644-1121 http://www.eoas.fsu.edu/people/faculty/dr-yang-wang Google Scholar: http://scholar.google.com/citations?user=uN9mVUoAAAAJ&hl=en Geochemistry Program National High Magnetic Field Laboratory 1800 E Paul Dirac Drive Tallahassee, FL 32310-3706 Phone: 850-644-1121 Fax: 850-644-0827 Office: B327 E-mail: ywang at magnet.fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: EOAS-Seminar-4-19-2024.pdf Type: application/pdf Size: 293559 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 1430 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Sat Apr 20 15:14:34 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sat, 20 Apr 2024 19:14:34 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Ben Adcock Message-ID: "CS4ML: A general framework for active learning with arbitrary data based on Christoffel functions" Ben Adcock Professor of Mathematics, Simon Fraser University Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic. All are welcome to attend. NOTE: In-person attendance is requested. Zoom access is intended for external (non-departmental) participants only. https://fsu.zoom.us/j/94273595552 Meeting # 942 7359 5552 Colloquium recordings will be made available here, https://www.sc.fsu.edu/colloquium Wednesday, Apr 24, 2024, Schedule: * 3:00 to 3:30 PM Eastern Time (US and Canada) Nespresso & Teatime - 417 DSL Commons * 3:30 to 4:30 PM Eastern Time (US and Canada) Colloquium - 499 DSL Seminar Room Abstract: Active learning is an important concept in machine learning, in which the learning algorithm can choose where to query the underlying ground truth to improve the accuracy of the learned model. As machine learning techniques come to be more commonly used in scientific computing problems, where data is often expensive to obtain, the use of active learning is expected to be particularly important in the design of efficient algorithms. In this talk, I will describe a general framework for active learning in regression problems. This framework extends the standard setup by allowing for general types of data, rather than merely pointwise samples of the target function. This generalization covers many cases of practical interest, such as data acquired in transform domains (e.g., Fourier data), vector-valued data (e.g., gradient-augmented data), data acquired along continuous curves, and multimodal data (i.e., combinations of different types of measurements). The framework considers random sampling according to a finite number of sampling measures and arbitrary nonlinear approximation spaces (model classes). I will introduce the concept of generalized Christoffel functions and show how these can be used to optimize the sampling measures. I will then describe how this leads to near-optimal sampling strategies in various important cases. This talk focuses on applications in scientific computing, where, as noted, active learning is often desirable, since it is usually expensive to generate data. I will conclude by demonstrating the efficacy of this framework for gradient-augmented learning with polynomials, Magnetic Resonance Imaging (MRI) using generative models and adaptive sampling for solving PDEs using Physics-Informed Neural Networks (PINNs). Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1802-colloquium-with-ben-adcock-2024-04-24 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 5669 bytes Desc: not available URL: -------------- next part -------------- _______________________________________________ SC-Seminar-announce mailing list SC-Seminar-announce at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/sc-seminar-announce From eoas-seminar at lists.fsu.edu Mon Apr 22 09:24:02 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 22 Apr 2024 13:24:02 +0000 Subject: [Eoas-seminar] Colloquium announcement, Friday, April 26 at 3:00 PM Message-ID: Hi all, This coming Friday at 3:00 PM, we will have this semester's last colloquium: Speaker: Dr. Cory Barton, Space Science Division, U.S. Naval Research Laboratory, Washington, D.C. Title: From Ground to Space: Challenges in New Frontiers of Numerical Weather Prediction Abstract: Numerical weather prediction (NWP) has grown considerably from its humble beginnings decades ago. Current state-of-the-art NWP models routinely produce skillful global forecasts at high resolution thanks to advances in computational fluid dynamics, understanding of physical meteorological processes, and availability of supercomputing resources. These advances have led many prediction centers worldwide to stretch the boundaries of their systems and begin exercising these models in spatial and temporal domains outside those of traditional NWP. One such system is the Navy Global Environmental Model (NAVGEM), which delivers operational tropospheric weather forecasts for the U.S. Navy. Recent development has provided a configuration of NAVGEM that leverages new scientific and computing capabilities to deliver long-range seasonal forecasts up to 100 km in altitude. A prototype research configuration is also in development that extends this capability even further to deliver space weather forecasts of the thermosphere up to 500 km in altitude. This presentation will review uncovered challenges in long-range and space weather prediction and describe novel strategies in evolving NAVGEM from a global NWP model into a whole atmosphere prediction system. Location: EOAS 1050 Time: Friday, April 26 at 3:00 PM Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Apr 22 14:13:56 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 22 Apr 2024 14:13:56 -0400 Subject: [Eoas-seminar] Upcoming Thesis and Dissertation Defenses Message-ID: As you are aware, we have an open house invitation for thesis and dissertation defenses.? This practice is followed to ensure we build a scholarly community among our student and faculty population.? In keeping with that mission, please consider joining us for the upcoming dissertation and thesis defenses, which are listed below.? In general, all defenses are posted to our public calendar , so you can always see what's coming around soon. *_24 April, rm 4067 EOA, 3 PM to 6 PM_* GLY Dissertation Prospectus Dfns--Lindsi Allman Title:? Observing metamorphic devolatilization during emplacement of the Central Atlantic Magmatic Province? [Major Prof, Dr. E Stewart] *_30 April, rm 3067 EOA, 2:30 PM to 4:30 PM_* GLY MS Prospectus Dfns--Maya Roselli Title:? Investigating Potential Relationships Between Soft-Bodied Preservation and Redox Conditions from the Middle Devonian (Givetian) Appalachian Basin? [Major Prof, Dr. S Evans] -- *Jimmy Pastrano* */Coordinator of Graduate Studies/* */FSU Earth, Ocean, and Atmospheric Science/* *3008-C EOAS Bldg* *Tallahassee, FL 32306-4520*** -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Apr 23 08:28:15 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 23 Apr 2024 12:28:15 +0000 Subject: [Eoas-seminar] Special Seminar: Dr. Greg Foltz AOML/PO, Monday, April 29, 3:00PM, Room 6042 Message-ID: Dear all, Please join us next MONDAY, April 29, in Room 6042 for a special seminar (made possible by Meteorology alumnus Dr. Mark Powell) given by Dr. Gregory Foltz of the Physical Oceanography Division of NOAA/AOML. He will speak about ?Direct measurements of the air-sea momentum flux and drag coefficient in hurricanes" The abstract is below. Dr. Foltz is also available for individual meetings in EOAS on Monday and Tuesday, and will be visiting COAPS Tuesday afternoon. If you?d like to meet with him in EOAS, please contact Bob Hart (rhart at fsu.edu) to schedule a day and time from those slots available. Graduate students: please join lunch with the speaker in Room 3067 at 11:45 AM on Monday. Please RSVP to Bob Hart by the end of the day Thursday. Summary: DATE: Monday, April 29 SEMINAR TIME: Refreshments at 2:45 PM, Talk 3:00 - 4:00 PM SEMINAR LOCATION: EOA 6042 (special time and room due to final exam scheduling) A reception will follow in the Mark Powell Observatory (Room 6067 Maproom). Seminar Title: Direct measurements of the air-sea momentum flux and drag coefficient in hurricanes The turbulent exchange of momentum between the ocean and atmosphere, known as wind stress, drives ocean currents and waves and acts to reduce near-surface wind speed. Wind stress is normally parameterized in terms of the product of the mean wind speed at a height of 10 meters, U10, and a drag coefficient, Cd. It is known that Cd increases with increasing U10 until about 25-30 m/s. However, there is considerable uncertainty regarding the behavior of Cd for U10 > 25 m/s, and there are conflicting results on the impact of surface waves on Cd. The large uncertainties are due in part to extremely limited concurrent and collocated direct measurements of wind stress, U10, and wave properties for U10 > 20 m/s and a lack of direct measurements for U10 > 30 m/s. Improved understanding of the air-sea momentum flux and the dependence of Cd on wind and ocean properties has the potential to improve forecast models and hurricane intensity prediction. During the past three Atlantic hurricane seasons, Saildrone uncrewed surface vehicles were steered into hurricane eyewalls to acquire continuous and direct measurements of the upper ocean and near-surface atmosphere, including U10, wind stress, and surface waves. Data were obtained from a complete transect through the eyewall of category-4 Hurricane Sam (2021), with measured wind gusts of up to 66 m/s, and from several other hurricanes. Results show an increase in Cd to a maximum of 0.0028 at U10 = 25 m/s, then a slight decrease and leveling off as U10 increases from 25 to 45 m/s. Interestingly, for U10 between 20 and 30 m/s, Cd is highly variable and is larger, on average, for greater misalignment between wind and dominant wave directions. Potential reasons for the large scatter of Cd in this wind range, and higher Cd for wind-wave misalignment, are discussed with the help of videos of the ocean's surface recorded during Hurricane Sam. Plausible explanations include sea state transitions within the 20-30 m/s wind range and delayed or accelerated transitions due to wind-wave alignment/misalignment. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Apr 25 08:00:05 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 25 Apr 2024 12:00:05 +0000 Subject: [Eoas-seminar] TODAY MET Seminar - Prof. Maria Molina (University of Maryland) In-Reply-To: References: Message-ID: Dear all, This is a reminder of today?s MET seminar given by Prof. Maria Molina of the University of Maryland. She will speak about ?Machine learning for Earth system prediction and predictability?. Snacks at 3, talk at 3:15 in 1044. See you there! Cheers, Allison -------------------------------------------- Allison A. Wing, Ph.D. Werner A. and Shirley B. Baum Professor Associate Professor, Department of Earth, Ocean, and Atmospheric Science Florida State University awing at fsu.edu On Apr 19, 2024, at 8:11 AM, eoas-seminar--- via Eoas-seminar wrote: Dear all, Please join us next Thursday April 25 for a Meteorology seminar given by Prof. Maria Molina of the University of Maryland. She will speak about ?Machine learning for Earth system prediction and predictability" (abstract below). Prof. Molina will be joining us in person. She is also available for individual meetings on Thursday. If you?d like to meet with her, please contact Allison Wing (awing at fsu.edu). As some of you may recall, Prof. Molina received her Bachelors degree in Meteorology from FSU in 2008, so she is particularly excited to catch up with some of her former professors. Graduate students, please join for lunch with the speaker at 12:15 PM on Thursday. Please RSVP to Allison Wing by the end of the day Tuesday. DATE: Thursday April 25 SEMINAR TIME: Refreshments at 3 PM, Talk 3:15 - 4:15 PM SEMINAR LOCATION: EOA 1044 (Speaker in person) SPEAKER:Prof. Maria Molina TITLE: Machine learning for Earth system prediction and predictability ABSTRACT: Machine learning can be used for Earth system prediction, or to study our ability to make skillful predictions given the system's initial state or other factors, otherwise known as predictability. In traditional numerical weather prediction frameworks, we solve the governing partial differential equations starting from an initial state. This initialized prediction framework usually involves three stages: 1) generating the initial conditions of the Earth system, 2) running the mathematical representation of the system on a computer forward in time, and 3) analyzing the output and converting it into a format that is useful for end users. Machine learning can be used to improve each of these individual stages, or to circumvent the three stage framework altogether, and examples of each will be given in this seminar. More time during the seminar will be dedicated to the challenges surrounding subseasonal prediction, which focuses on lead times of three to four weeks, and how we can use machine learning to both uncover potential biases in our initialized prediction systems and how we can bias-correct them. We look forward to seeing you there! Cheers, Allison -------------------------------------------- Allison A. Wing, Ph.D. Werner A. and Shirley B. Baum Professor Associate 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Apr 26 09:16:32 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 26 Apr 2024 09:16:32 -0400 Subject: [Eoas-seminar] Reminder Colloquium announcement, TODAY at 3:00 PM In-Reply-To: References: Message-ID: Hi all, TODAY at 3:00 PM, we will have this semester's last colloquium: *Speaker*: Dr. Cory Barton, Space Science Division, U.S. Naval Research Laboratory, Washington, D.C. *Title*: From Ground to Space: Challenges in New Frontiers of Numerical Weather Prediction *Abstract*: Numerical weather prediction (NWP) has grown considerably from its humble beginnings decades ago. Current state-of-the-art NWP models routinely produce skillful global forecasts at high resolution thanks to advances in computational fluid dynamics, understanding of physical meteorological processes, and availability of supercomputing resources. These advances have led many prediction centers worldwide to stretch the boundaries of their systems and begin exercising these models in spatial and temporal domains outside those of traditional NWP. One such system is the Navy Global Environmental Model (NAVGEM), which delivers operational tropospheric weather forecasts for the U.S. Navy. Recent development has provided a configuration of NAVGEM that leverages new scientific and computing capabilities to deliver long-range seasonal forecasts up to 100 km in altitude. A prototype research configuration is also in development that extends this capability even further to deliver space weather forecasts of the thermosphere up to 500 km in altitude. This presentation will review uncovered challenges in long-range and space weather prediction and describe novel strategies in evolving NAVGEM from a global NWP model into a whole atmosphere prediction system. *Location*: EOAS 1050 *Time*: Friday, April 26 at 3:00 PM -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- _______________________________________________ Eoas-seminar mailing list Eoas-seminar at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-seminar From eoas-seminar at lists.fsu.edu Mon Apr 29 09:48:14 2024 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 29 Apr 2024 13:48:14 +0000 Subject: [Eoas-seminar] TODAY: Special Seminar: Dr. Greg Foltz AOML/PO, Monday, April 29, 3:00PM, Room 6042 In-Reply-To: References: Message-ID: Just a reminder of today's Powell seminar at 3pm in room 6042. Original email follows below. ________________________________ From: Eoas-seminar on behalf of eoas-seminar--- via Eoas-seminar Sent: Tuesday, April 23, 2024 8:28 AM To: Eoas-seminar Subject: [Eoas-seminar] Special Seminar: Dr. Greg Foltz AOML/PO, Monday, April 29, 3:00PM, Room 6042 Dear all, Please join us next MONDAY, April 29, in Room 6042 for a special seminar (made possible by Meteorology alumnus Dr. Mark Powell) given by Dr. Gregory Foltz of the Physical Oceanography Division of NOAA/AOML. He will speak about ?Direct measurements of the air-sea momentum flux and drag coefficient in hurricanes" The abstract is below. Dr. Foltz is also available for individual meetings in EOAS on Monday and Tuesday, and will be visiting COAPS Tuesday afternoon. If you?d like to meet with him in EOAS, please contact Bob Hart (rhart at fsu.edu) to schedule a day and time from those slots available. Graduate students: please join lunch with the speaker in Room 3067 at 11:45 AM on Monday. Please RSVP to Bob Hart by the end of the day Thursday. Summary: DATE: Monday, April 29 SEMINAR TIME: Refreshments at 2:45 PM, Talk 3:00 - 4:00 PM SEMINAR LOCATION: EOA 6042 (special time and room due to final exam scheduling) A reception will follow in the Mark Powell Observatory (Room 6067 Maproom). Seminar Title: Direct measurements of the air-sea momentum flux and drag coefficient in hurricanes The turbulent exchange of momentum between the ocean and atmosphere, known as wind stress, drives ocean currents and waves and acts to reduce near-surface wind speed. Wind stress is normally parameterized in terms of the product of the mean wind speed at a height of 10 meters, U10, and a drag coefficient, Cd. It is known that Cd increases with increasing U10 until about 25-30 m/s. However, there is considerable uncertainty regarding the behavior of Cd for U10 > 25 m/s, and there are conflicting results on the impact of surface waves on Cd. The large uncertainties are due in part to extremely limited concurrent and collocated direct measurements of wind stress, U10, and wave properties for U10 > 20 m/s and a lack of direct measurements for U10 > 30 m/s. Improved understanding of the air-sea momentum flux and the dependence of Cd on wind and ocean properties has the potential to improve forecast models and hurricane intensity prediction. During the past three Atlantic hurricane seasons, Saildrone uncrewed surface vehicles were steered into hurricane eyewalls to acquire continuous and direct measurements of the upper ocean and near-surface atmosphere, including U10, wind stress, and surface waves. Data were obtained from a complete transect through the eyewall of category-4 Hurricane Sam (2021), with measured wind gusts of up to 66 m/s, and from several other hurricanes. Results show an increase in Cd to a maximum of 0.0028 at U10 = 25 m/s, then a slight decrease and leveling off as U10 increases from 25 to 45 m/s. Interestingly, for U10 between 20 and 30 m/s, Cd is highly variable and is larger, on average, for greater misalignment between wind and dominant wave directions. Potential reasons for the large scatter of Cd in this wind range, and higher Cd for wind-wave misalignment, are discussed with the help of videos of the ocean's surface recorded during Hurricane Sam. Plausible explanations include sea state transitions within the 20-30 m/s wind range and delayed or accelerated transitions due to wind-wave alignment/misalignment. -------------- next part -------------- An HTML attachment was scrubbed... URL: