From eoas-seminar at lists.fsu.edu Sat Mar 1 06:37:46 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sat, 1 Mar 2025 11:37:46 +0000 Subject: [Eoas-seminar] March 4 seminar announcement for Dr. Kosuke Ito, Kyoto Univ. Message-ID: Colleagues, At 3pm on March 4 (this upcoming Tuesday) in Room 1044 there will be a seminar by Dr. Kosuke Ito, Professor at DPRI, Kyoto University, Japan. Refreshments will be available starting at 245pm. There will be a lunch for interested students in Room 3067 at noon on the same day, with Prof. Ito. The seminar information is below. His equally interesting earlier work included the modeling the ratio of drag to enthalpy coefficients in tropical cyclones, a topic critical to both understanding and forecasting tropical cyclone intensity change and peak intensity. Bob Title: Three dimensional (tropical cyclone) Fujiwhara effect Abstract: It has been widely believed that binary tropical cyclones (TCs) rotate cyclonically and get closer to each other with respect to the center of the circulations (known as "Fujiwhara effect"). In fact, binary TCs (initially separated by 1000 km or more) move away from each other in the quiescent environment on an f-plane, based on an idealized simulation with a three-dimensional model. To investigate this phenomena, we calculated the potential vorticity (PV) budget and found that the horizontal advection term was largely compensated by the asymmetric diabatic heating. The asymmetric diabatic heating served to resist the cyclonic rotation and help the motion moving away from each other. This asymmetric diabatic heating was associated with the vertical wind shear (VWS) consisting of the upper-level anticyclonic circulation and lower-level cyclonic circulation, both of which were originally from the binary TCs. These three-dimensional Fujiwhara effects were verified in the western North Pacific using the best track and ERA5 reanalysis data. The TC motion was found to deviate systematically from the steering flow. The direction of deviation is clockwise and repelling with respect to the midpoint of the binary TCs with a separation distance of more than 1000 km. The large-scale upper-level anticyclonic and lower-level cyclonic circulations serve as the VWS for each TC in a manner consistent with the idealized simulations. The VWS of a TC tends to be directed to the rear-left quadrant from the direction of the counterpart TC, where the maxima of rainfall and diabatic heating are observed. The PV budget analysis supports that the actual TC motion is modulated by the diabatic heating asymmetry that offsets the counterclockwise and approaching motion owing to horizontal advection when the separation distance of the binary TCs is 1000?2000 km. With a small separation distance (<1000 km), horizontal advection becomes significant, but the impact of diabatic heating asymmetry is not negligible. These features are robust, while there are some dependencies on the TC intensities, size, circulation, duration, and geographical location. This research sheds light on the motion of binary TCs that has not been previously explained by a two-dimensional barotropic framework. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Mar 4 07:31:00 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 4 Mar 2025 12:31:00 +0000 Subject: [Eoas-seminar] Reminder for TODAY: Seminar Dr. Kosuke Ito, Kyoto Univ., 3PM In-Reply-To: References: Message-ID: Colleagues, Just a friendly reminder that at 3pm TODAY in Room 1044 there will be a seminar by Dr. Kosuke Ito, Professor at DPRI, Kyoto University, Japan. Refreshments will be available starting at 245pm. There will be a graduate student lunch (both pizza and salad) in Room 3067 at noon with Prof. Ito. All graduate students are welcome to attend. The seminar information is below. His equally interesting earlier work included the modeling the ratio of drag to enthalpy coefficients in tropical cyclones, a topic critical to both understanding and forecasting tropical cyclone intensity change and peak intensity. Following the seminar, faculty and postdocs are most welcome to join us at Proof at the Union. Bob Title: Three dimensional (tropical cyclone) Fujiwhara effect Abstract: It has been widely believed that binary tropical cyclones (TCs) rotate cyclonically and get closer to each other with respect to the center of the circulations (known as "Fujiwhara effect"). In fact, binary TCs (initially separated by 1000 km or more) move away from each other in the quiescent environment on an f-plane, based on an idealized simulation with a three-dimensional model. To investigate this phenomena, we calculated the potential vorticity (PV) budget and found that the horizontal advection term was largely compensated by the asymmetric diabatic heating. The asymmetric diabatic heating served to resist the cyclonic rotation and help the motion moving away from each other. This asymmetric diabatic heating was associated with the vertical wind shear (VWS) consisting of the upper-level anticyclonic circulation and lower-level cyclonic circulation, both of which were originally from the binary TCs. These three-dimensional Fujiwhara effects were verified in the western North Pacific using the best track and ERA5 reanalysis data. The TC motion was found to deviate systematically from the steering flow. The direction of deviation is clockwise and repelling with respect to the midpoint of the binary TCs with a separation distance of more than 1000 km. The large-scale upper-level anticyclonic and lower-level cyclonic circulations serve as the VWS for each TC in a manner consistent with the idealized simulations. The VWS of a TC tends to be directed to the rear-left quadrant from the direction of the counterpart TC, where the maxima of rainfall and diabatic heating are observed. The PV budget analysis supports that the actual TC motion is modulated by the diabatic heating asymmetry that offsets the counterclockwise and approaching motion owing to horizontal advection when the separation distance of the binary TCs is 1000?2000 km. With a small separation distance (<1000 km), horizontal advection becomes significant, but the impact of diabatic heating asymmetry is not negligible. These features are robust, while there are some dependencies on the TC intensities, size, circulation, duration, and geographical location. This research sheds light on the motion of binary TCs that has not been previously explained by a two-dimensional barotropic framework. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Sun Mar 16 16:03:48 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sun, 16 Mar 2025 20:03:48 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Ryan Learn Message-ID: "Stellar Turbulence Modeling with Adaptive Mesh Refinement: Assessment of Performance of Select Refinement Strategies" Ryan Learn Department of Mathematics and Statistics Washington State University Tri-Cities 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 in our 499 Dirac Science Library (DSL) Seminar Room. 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, Mar 19, 2025, 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: Turbulent flows are ubiquitous in Earth-bound and astrophysical physical systems, and numerical simulations of such flows features prominently in such varied applications as weather forecasting, studies of convective plumes within the Earth's mantle, and modeling of supernova progenitors. Such studies require significant amounts of computational resources and benefit greatly from advances in computational methods, specifically in the case of terrestrial combustion studies, defense applications, problems in planetary sciences and astrophysics, the use of Adaptive Mesh Refinement (AMR), has achieved particular success. AMR leverages the fact that computational effort to obtain certain solution accuracy may not be uniform throughout the computational domain. Thus, AMR schemes selectively place finer-resolution grids in regions corresponding to high solution error, and coarser grids in regions corresponding to lower solution error. Such discontinuous refinement seeks to compute solutions on the same order of accuracy as uniform meshes, but much more efficiently. In the case of realistic fluid flows, computation of exact solution error is unachievable, and thus various proxies for solution error must be used, resulting in a wide variety of mesh refinement schemes, using solution quality estimators to selectively refine and coarsen the grid. Despite the widespread implementation of AMR methods using various refinement schemes in computational fluid dynamic codes, the effect of these discontinuous discretizations on the statical properties of turbulent flows has largely been unexamined, potential having a deleterious effect on the accuracy of numerical solution studied using such codes. In this talk, we present our findings on the effect of various AMR refinement schemes on select key statistical metrics of turbulence in a variety of weakly-to-moderately compressible flows under conditions typical of select astrophysical systems. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1864-colloquium-with-ryan-learn-2025-03-19 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 6048 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 Mar 17 07:22:01 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 17 Mar 2025 11:22:01 +0000 Subject: [Eoas-seminar] Friday March 21, 3 PM - Baum Lecture by Prof. Tiffany Shaw (University of Chicago) Message-ID: Dear all, This is a reminder to please join us for the Werner A. Baum Lecture this Friday March 21 at 3 PM in EOA 1050, to be given by climate scientist Dr. Tiffany Shaw, professor at the University of Chicago. See the attached flyer for more information. Prof. Shaw will present ?Moving beyond the mean to understand circulation extremes under climate change? (abstract below). While this is intended as an in-person event, if you have a medical excuse or approved work off campus, please contact Allison Wing (awing at fsu.edu) for a Zoom link. DATE: Friday March 21 TIME: 3-4 PM LOCATION: EOA 1050 SPEAKER: Prof. Tiffany Shaw TITLE: Moving beyond the mean to understand circulation extremes under climate change ABSTRACT: Much has been learned about the response of the mean circulation, including storm tracks, and jet streams, etc., under climate change. However, much less is known about how circulation extremes will respond to climate change. This is in contrast to our understanding of thermodynamic extremes. In this talk we will show circulation extremes, representing upper-level jet streaks and extreme jet stream waviness, exhibit a fast-get-faster response under climate change. The fast-get-faster response is geostrophic, robust across a climate model hierarchy and not connected to Arctic Sea ice loss. Arctic Sea ice loss, which has been proposed as a driver of increased waviness, leads to a fast-get-slower response at all vertical levels. The fast-get-faster response is shown to be connected to the non-linear Clausius-Clapeyron relation via moist thermal wind and can be predicted analytically assuming a moist atmosphere. Finally, we show the fast-get-faster signal has emerged from the noise in reanalysis data in some regions indicating significant changes in the circulation distribution in the satellite era. BIO: Prof. Tiffany Shaw?s research focuses on the physics of the atmosphere and climate system past, present and future. She seeks to understand the underlying mechanisms controlling the response to climate changes so that we can have greater confidence in climate predictions. Prof. Shaw is the recipient of an NSF CAREER award, Packard Fellowship in Science and Engineering, a Sloan Research Fellowship and most recently a Bessel award from the Humboldt Foundation. She is a fellow of the American Geophysical Union and American Physical Society. -------------------------------------------- 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 Mon Mar 17 18:21:55 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 17 Mar 2025 18:21:55 -0400 Subject: [Eoas-seminar] Fwd: Carothers Lectures April 15 In-Reply-To: <30DC10F7-8563-4E59-87B5-4B6DC0D6D78C@fsu.edu> References: <30DC10F7-8563-4E59-87B5-4B6DC0D6D78C@fsu.edu> Message-ID: Our next Carothers Lectures Series lecture is on Tuesday, April 15, when Mia Lustria and Zhe He -- both Professors in the School of Information -- will speak to us about "LabGenie: Using AI to Empower Older Adults for Shared Decision Making." This should be an awesome way to wrap up the academic year!! 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%2Fforms.office.com%2Fr%2F3FqXuvSMjK&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C4c87a5f0b36e436dc1b208dd65a2215b%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638778469198197460%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=loS6M7BjRvxqEs3AU6j68TXqvdmmPrJwkL3ZTI0wiRM%3D&reserved=0 All best wishes, and as always, many thanks to everyone on the committee, as well as the Office of Research, the University Libraries, and the Office of Faculty Development and Advancement for sponsoring this series!! --Paul ------------- Paul F. Marty, Ph.D. Professor, School of Information Associate Vice Provost for Academic?Innovation Florida State University ? https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmarty.cci.fsu.edu%2F&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C4c87a5f0b36e436dc1b208dd65a2215b%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638778469201726633%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=3Ushn6UFKrKtxlIpComjx6rYeWmViqJFcsyqH7YAgX4%3D&reserved=0 ? marty at fsu.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: FSU Innovation.png Type: image/png Size: 33703 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: apr15_flyer.pdf Type: application/pdf Size: 959048 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Wed Mar 19 09:28:15 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 19 Mar 2025 13:28:15 +0000 Subject: [Eoas-seminar] MET Seminar - Tuesday March 25 - Dr. Rosa Vargas Martes (FSU/U. Toronto) Message-ID: Dear all, In addition to the Baum Lecture this Friday, we will have a MET seminar next Tuesday March 25. Please join us for next week?s MET seminar on Tuesday March 25 at 3 PM, which will be given by Dr. Rosa Vargas Martes who is a postdoctoral scholar here in EOAS and at the University of Toronto. Dr. Vargas Martes will speak about "Governing thermodynamic structure of tropical East Pacific and African Easterly Waves and their representation in CMIP6 models.? (abstract below). Dr. Vargas Martes will be presenting her seminar virtually but we will join together in 1044 to attend the seminar. A Zoom link is available for those with a medical excuse or approved work off-campus. Please contact Allison Wing (awing at fsu.edu) for the link. DATE: Tuesday March 25 SEMINAR TIME: 3-4 PM, please join early for refreshments SEMINAR LOCATION: EOA 1044 (speaker remote) SPEAKER: Dr. Rosa Vargas Martes TITLE: Governing thermodynamic structure of tropical East Pacific and African Easterly Waves and their representation in CMIP6 models. ABSTRACT: The representation of easterly waves (EWs) over the east Pacific Ocean (PEWs) and west Africa (AEWs) in Coupled Model Intercomparison Project phase 6 (CMIP6) simulations is examined. Models are assessed based on their capability of reproducing PEW-related precipitation in reanalysis. The leading patterns reveal a large spread in the representation of PEW and AEW structure and amplitude. Further comparison of models with highest (good) and lowest (unrealistically weak) PEW skill and reanalysis showed that good simulations robustly capture the mean state and EWs thermodynamic structure over the east Pacific. Particularly, CMIP6 models capture a more humid mean state when compared to reanalysis, with good models exhibiting a stronger meridional gradient in specific humidity. The leading structure in good models has a strong pre-existing wave signal from the Caribbean, the lack thereof in unrealistically weak models suggests that in-situ generation could be taking place. Examination of the precipitation-moisture relationship revealed that CMIP6 simulations were insufficiently sensitive to column moisture. Similarly, models that reproduced realistic and unrealistically strong (highly and weakly correlated) AEW patterns were chosen for further analysis. Results show that simulations with unrealistically strong AEWs exhibit strong mean state precipitation over the African Monsoon region, stronger anomalous moisture, temperature and moist static energy, smaller moist convective adjustment timescales, and weaker mean state meridional humidity and moist static energy gradients. PEW and AEW results indicate that EW growth is more consistent with moisture-vortex instability than baroclinic instability. These results underscore the relevance of the governing thermodynamic drivers in the representation of PEW and AEWs. ?????????????????? Allison 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 Mar 21 08:01:34 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 21 Mar 2025 12:01:34 +0000 Subject: [Eoas-seminar] TODAY 3 PM - Baum Lecture by Prof. Tiffany Shaw (University of Chicago) In-Reply-To: References: Message-ID: Dear all, A final reminder about the Baum lecture - today at 3 PM in EOA 1050! 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 Mar 17, 2025, at 7:22?AM, eoas-seminar--- via Eoas-seminar wrote: Dear all, This is a reminder to please join us for the Werner A. Baum Lecture this Friday March 21 at 3 PM in EOA 1050, to be given by climate scientist Dr. Tiffany Shaw, professor at the University of Chicago. See the attached flyer for more information. Prof. Shaw will present ?Moving beyond the mean to understand circulation extremes under climate change? (abstract below). While this is intended as an in-person event, if you have a medical excuse or approved work off campus, please contact Allison Wing (awing at fsu.edu) for a Zoom link. DATE: Friday March 21 TIME: 3-4 PM LOCATION: EOA 1050 SPEAKER: Prof. Tiffany Shaw TITLE: Moving beyond the mean to understand circulation extremes under climate change ABSTRACT: Much has been learned about the response of the mean circulation, including storm tracks, and jet streams, etc., under climate change. However, much less is known about how circulation extremes will respond to climate change. This is in contrast to our understanding of thermodynamic extremes. In this talk we will show circulation extremes, representing upper-level jet streaks and extreme jet stream waviness, exhibit a fast-get-faster response under climate change. The fast-get-faster response is geostrophic, robust across a climate model hierarchy and not connected to Arctic Sea ice loss. Arctic Sea ice loss, which has been proposed as a driver of increased waviness, leads to a fast-get-slower response at all vertical levels. The fast-get-faster response is shown to be connected to the non-linear Clausius-Clapeyron relation via moist thermal wind and can be predicted analytically assuming a moist atmosphere. Finally, we show the fast-get-faster signal has emerged from the noise in reanalysis data in some regions indicating significant changes in the circulation distribution in the satellite era. BIO: Prof. Tiffany Shaw?s research focuses on the physics of the atmosphere and climate system past, present and future. She seeks to understand the underlying mechanisms controlling the response to climate changes so that we can have greater confidence in climate predictions. Prof. Shaw is the recipient of an NSF CAREER award, Packard Fellowship in Science and Engineering, a Sloan Research Fellowship and most recently a Bessel award from the Humboldt Foundation. She is a fellow of the American Geophysical Union and American Physical Society. -------------------------------------------- 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: -------------- next part -------------- A non-text attachment was scrubbed... Name: 2025 - Baum Lecture - Flyer - 2.pdf Type: application/pdf Size: 160904 bytes Desc: 2025 - Baum Lecture - Flyer - 2.pdf URL: From eoas-seminar at lists.fsu.edu Mon Mar 24 08:56:04 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 24 Mar 2025 12:56:04 +0000 Subject: [Eoas-seminar] EOAS seminar this Friday Message-ID: Dear all, Professor Liling Chang in FSU Geography department will give a seminar this Friday in EOA 1044. Please see the details of her seminar below. Look forward to seeing you at the seminar. DATE: Friday March 28 TIME: 3-4 PM LOCATION: EOA 1044 SPEAKER: Prof. Liling Chang, FSU Geography TITLE: Can We Leverage Multi-Source Observations to Improve Future Predictions of Ecosystem Dynamics? ABSTRACT: Recent estimates suggest that around 30% of the anthropogenic CO2 emissions being absorbed by the terrestrial biosphere. The land biosphere also dominates the year-to-year variability of atmospheric CO2 concentrations. Consequently, accurate estimates of the current and future magnitude of terrestrial carbon stocks and fluxes are critical for predicting the rate at which CO2 will continue to accumulate in the Earth's atmosphere, and the resulting rate and magnitude of climate change over the coming century. Predictions regarding the future composition, structure, and functioning of terrestrial ecosystems in response to ongoing climate change rely heavily on the predictions of terrestrial biosphere and ecosystem models. Compared to rates of oceanic carbon uptake and release, estimates of the current and future magnitudes of the terrestrial carbon sink are highly uncertain. In this talk, we will 1) explore how uncertainty in current ecosystem states propagates through model forecasts and 2) demonstrates how to leverage multi-source observations to improve future predictions of ecosystem carbon and water cycles. BIO: Dr. Liling Chang is currently an Assistant Professor in the Department of Geography at FSU, previously holding the same position at the University of Birmingham in the UK. She earned her doctorate in Hydrometeorology from the University of Arizona in 2021 followed by a two-year postdoctoral training at Harvard University. she is interested in examining responses of terrestrial ecosystems to climate variability, elevated atmospheric CO2, and disturbance events. Her research focuses on integrating field observations, remote sensing data, and process-based models to quantify and predict ecosystem water, energy, carbon fluxes, productivity, and demography. -------------- Ming Ye, Ph.D. Professor in Hydrogeology Department of Earth, Ocean, and Atmospheric Science Department of Scientific Computing Office: 3015 EOAS Building (1011 Academic Way) Phone: 850-645-4987 Florida State University Tallahassee, FL 32306-4520 Email: mye at fsu.edu http://earth.eoas.fsu.edu/~mye/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Mar 24 13:24:38 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 24 Mar 2025 17:24:38 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Silei Song Message-ID: "WoS-NN: Collaborating Walk-on-Spheres with Machine Learning to Solve Elliptic PDEs" Silei Song Graduate Assistant in Teaching, Department of Computer Science, Florida State University (FSU) 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 in our 499 Dirac Science Library (DSL) Seminar Room. 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, Mar 26, 2025, 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: Solving elliptic partial differential equations (PDEs) is a fundamental step in various scientific and engineering studies. As a classic stochastic solver, the Walk on Spheres (WoS) method is a well-established and efficient algorithm that provides accurate local estimates for PDEs. However, limited by the curse of dimensionality, WoS may not offer sufficiently precise global estimations, which becomes more serious in high-dimensional scenarios. Recent developments in machine learning offer promising strategies to address this limitation. By integrating machine learning techniques with WoS and space discretization approaches, we developed a novel stochastic solver, WoS-NN. This new method solves elliptic problems with Dirichlet boundary conditions, facilitating precise and rapid global solutions and gradient approximations. A typical experimental result demonstrated that the proposed WoS-NN method provides accurate field estimations, reducing 76.32% errors while using only 8% of path samples compared to the conventional WoS method, which saves abundant computational time and resource consumption. This seminar will include a general description of stochastic solvers for different PDEs, the design and execution of WoS-NN, and experiment results indicating the fascination of our method. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1866-colloquium-with-silei-song-2025-03-26 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 5343 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 Tue Mar 25 08:14:49 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 25 Mar 2025 12:14:49 +0000 Subject: [Eoas-seminar] Reminder MET Seminar TODAY 3 PM - Dr. Rosa Vargas Martes (FSU/U. Toronto) In-Reply-To: References: Message-ID: Dear all, This is a reminder of today?s MET seminar, given by Dr. Rosa Vargas Martes on Governing thermodynamic structure of tropical East Pacific and African Easterly Waves and their representation in CMIP6 models Talk at 3 pm in 1044 (speaker remote). Join early for snacks! 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 Mar 19, 2025, at 9:28?AM, eoas-seminar--- via Eoas-seminar wrote: Dear all, In addition to the Baum Lecture this Friday, we will have a MET seminar next Tuesday March 25. Please join us for next week?s MET seminar on Tuesday March 25 at 3 PM, which will be given by Dr. Rosa Vargas Martes who is a postdoctoral scholar here in EOAS and at the University of Toronto. Dr. Vargas Martes will speak about "Governing thermodynamic structure of tropical East Pacific and African Easterly Waves and their representation in CMIP6 models.? (abstract below). Dr. Vargas Martes will be presenting her seminar virtually but we will join together in 1044 to attend the seminar. A Zoom link is available for those with a medical excuse or approved work off-campus. Please contact Allison Wing (awing at fsu.edu) for the link. DATE: Tuesday March 25 SEMINAR TIME: 3-4 PM, please join early for refreshments SEMINAR LOCATION: EOA 1044 (speaker remote) SPEAKER: Dr. Rosa Vargas Martes TITLE: Governing thermodynamic structure of tropical East Pacific and African Easterly Waves and their representation in CMIP6 models. ABSTRACT: The representation of easterly waves (EWs) over the east Pacific Ocean (PEWs) and west Africa (AEWs) in Coupled Model Intercomparison Project phase 6 (CMIP6) simulations is examined. Models are assessed based on their capability of reproducing PEW-related precipitation in reanalysis. The leading patterns reveal a large spread in the representation of PEW and AEW structure and amplitude. Further comparison of models with highest (good) and lowest (unrealistically weak) PEW skill and reanalysis showed that good simulations robustly capture the mean state and EWs thermodynamic structure over the east Pacific. Particularly, CMIP6 models capture a more humid mean state when compared to reanalysis, with good models exhibiting a stronger meridional gradient in specific humidity. The leading structure in good models has a strong pre-existing wave signal from the Caribbean, the lack thereof in unrealistically weak models suggests that in-situ generation could be taking place. Examination of the precipitation-moisture relationship revealed that CMIP6 simulations were insufficiently sensitive to column moisture. Similarly, models that reproduced realistic and unrealistically strong (highly and weakly correlated) AEW patterns were chosen for further analysis. Results show that simulations with unrealistically strong AEWs exhibit strong mean state precipitation over the African Monsoon region, stronger anomalous moisture, temperature and moist static energy, smaller moist convective adjustment timescales, and weaker mean state meridional humidity and moist static energy gradients. PEW and AEW results indicate that EW growth is more consistent with moisture-vortex instability than baroclinic instability. These results underscore the relevance of the governing thermodynamic drivers in the representation of PEW and AEWs. ?????????????????? Allison 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 Mar 28 08:00:09 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 28 Mar 2025 12:00:09 +0000 Subject: [Eoas-seminar] MET Seminar - Tuesday April 1 - Dr. Andrew Williams (Princeton/NOAA GFDL) Message-ID: Dear all, Please join us for next week?s MET seminar on Tuesday April 1 at 3 PM, which will be given by Dr. Andrew Williams, who is a postdoctoral research fellow at Princeton University/NOAA GFDL. He will speak about "A robust constraint on the response of convective mass fluxes to warming.? (abstract below). Dr. Williams will be presenting his seminar virtually but we will join together in 1044 to attend the seminar. A Zoom link is available for those with a medical excuse or approved work off-campus. Please contact Allison Wing (awing at fsu.edu) for the link. If you would like to meet with Dr. Williams via Zoom, please contact Allison Wing (awing at fsu.edu) DATE: Tuesday April 1 SEMINAR TIME: 3-4 PM, please join early for refreshments SEMINAR LOCATION: EOA 1044 (speaker remote) SPEAKER: Dr. Andrew Williams TITLE: A robust constraint on the response of convective mass fluxes to warming ABSTRACT: A fundamental quantity in tropical dynamics is the "convective mass flux", which measures the rate at which mass is transported upwards, per unit area, in convective updrafts. Convective mass flux encodes information about the frequency and intensity of thunderstorms and has been linked to the strength of the large-scale tropical circulation. In this talk I will introduce a new framework for quantifying changes in convective mass flux using the clear-sky energy budget. This framework shows that convective mass fluxes decrease at around 3-5 % / K under warming, when viewed at a fixed isotherm. This decrease in convective mass flux with warming is driven by a stabilization of the lapse rate and can be captured with a simple analytical model. I also revisit previous work by Held and Soden (2006), who proposed a scaling for changes in the convective mass flux with warming, and show that the Held and Soden scaling does not capture inter-model spread in mass flux changes under warming. This work provides a quantitative constraint on changes in convective mass flux with warming and establishes a new framework for understanding changes in convection in a warming climate. ?????????????????? Allison 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 Mar 28 08:47:26 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 28 Mar 2025 12:47:26 +0000 Subject: [Eoas-seminar] EOAS seminar this Friday In-Reply-To: References: Message-ID: Dear All, just a reminder about today's EOAS seminar at 3pm. Please see below for more details. See you at the seminar. -Ming -------------- Ming Ye, Ph.D. Professor in Hydrogeology Department of Earth, Ocean, and Atmospheric Science Department of Scientific Computing From: Eoas-seminar On Behalf Of eoas-seminar--- via Eoas-seminar Sent: Monday, March 24, 2025 8:56 AM To: eoas-seminar at lists.fsu.edu Subject: [Eoas-seminar] EOAS seminar this Friday Dear all, Professor Liling Chang in FSU Geography department will give a seminar this Friday in EOA 1044. Please see the details of her seminar below. Look forward to seeing you at the seminar. DATE: Friday March 28 TIME: 3-4 PM LOCATION: EOA 1044 SPEAKER: Prof. Liling Chang, FSU Geography TITLE: Can We Leverage Multi-Source Observations to Improve Future Predictions of Ecosystem Dynamics? ABSTRACT: Recent estimates suggest that around 30% of the anthropogenic CO2 emissions being absorbed by the terrestrial biosphere. The land biosphere also dominates the year-to-year variability of atmospheric CO2 concentrations. Consequently, accurate estimates of the current and future magnitude of terrestrial carbon stocks and fluxes are critical for predicting the rate at which CO2 will continue to accumulate in the Earth's atmosphere, and the resulting rate and magnitude of climate change over the coming century. Predictions regarding the future composition, structure, and functioning of terrestrial ecosystems in response to ongoing climate change rely heavily on the predictions of terrestrial biosphere and ecosystem models. Compared to rates of oceanic carbon uptake and release, estimates of the current and future magnitudes of the terrestrial carbon sink are highly uncertain. In this talk, we will 1) explore how uncertainty in current ecosystem states propagates through model forecasts and 2) demonstrates how to leverage multi-source observations to improve future predictions of ecosystem carbon and water cycles. BIO: Dr. Liling Chang is currently an Assistant Professor in the Department of Geography at FSU, previously holding the same position at the University of Birmingham in the UK. She earned her doctorate in Hydrometeorology from the University of Arizona in 2021 followed by a two-year postdoctoral training at Harvard University. she is interested in examining responses of terrestrial ecosystems to climate variability, elevated atmospheric CO2, and disturbance events. Her research focuses on integrating field observations, remote sensing data, and process-based models to quantify and predict ecosystem water, energy, carbon fluxes, productivity, and demography. -------------- Ming Ye, Ph.D. Professor in Hydrogeology Department of Earth, Ocean, and Atmospheric Science Department of Scientific Computing Office: 3015 EOAS Building (1011 Academic Way) Phone: 850-645-4987 Florida State University Tallahassee, FL 32306-4520 Email: mye at fsu.edu http://earth.eoas.fsu.edu/~mye/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Mar 28 10:24:41 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 28 Mar 2025 14:24:41 +0000 Subject: [Eoas-seminar] EOAS seminar this Friday In-Reply-To: References: Message-ID: Dear All, per requests from several colleagues, a zoom meeting was set up for the meeting. Please join the seminar at https://fsu.zoom.us/j/93824164805. -Ming -------------- Ming Ye, Ph.D. Professor in Hydrogeology Department of Earth, Ocean, and Atmospheric Science Department of Scientific Computing From: Eoas-seminar On Behalf Of eoas-seminar--- via Eoas-seminar Sent: Friday, March 28, 2025 8:47 AM To: eoas-seminar at lists.fsu.edu Subject: Re: [Eoas-seminar] EOAS seminar this Friday Dear All, just a reminder about today's EOAS seminar at 3pm. Please see below for more details. See you at the seminar. -Ming -------------- Ming Ye, Ph.D. Professor in Hydrogeology Department of Earth, Ocean, and Atmospheric Science Department of Scientific Computing From: Eoas-seminar > On Behalf Of eoas-seminar--- via Eoas-seminar Sent: Monday, March 24, 2025 8:56 AM To: eoas-seminar at lists.fsu.edu Subject: [Eoas-seminar] EOAS seminar this Friday Dear all, Professor Liling Chang in FSU Geography department will give a seminar this Friday in EOA 1044. Please see the details of her seminar below. Look forward to seeing you at the seminar. DATE: Friday March 28 TIME: 3-4 PM LOCATION: EOA 1044 SPEAKER: Prof. Liling Chang, FSU Geography TITLE: Can We Leverage Multi-Source Observations to Improve Future Predictions of Ecosystem Dynamics? ABSTRACT: Recent estimates suggest that around 30% of the anthropogenic CO2 emissions being absorbed by the terrestrial biosphere. The land biosphere also dominates the year-to-year variability of atmospheric CO2 concentrations. Consequently, accurate estimates of the current and future magnitude of terrestrial carbon stocks and fluxes are critical for predicting the rate at which CO2 will continue to accumulate in the Earth's atmosphere, and the resulting rate and magnitude of climate change over the coming century. Predictions regarding the future composition, structure, and functioning of terrestrial ecosystems in response to ongoing climate change rely heavily on the predictions of terrestrial biosphere and ecosystem models. Compared to rates of oceanic carbon uptake and release, estimates of the current and future magnitudes of the terrestrial carbon sink are highly uncertain. In this talk, we will 1) explore how uncertainty in current ecosystem states propagates through model forecasts and 2) demonstrates how to leverage multi-source observations to improve future predictions of ecosystem carbon and water cycles. BIO: Dr. Liling Chang is currently an Assistant Professor in the Department of Geography at FSU, previously holding the same position at the University of Birmingham in the UK. She earned her doctorate in Hydrometeorology from the University of Arizona in 2021 followed by a two-year postdoctoral training at Harvard University. she is interested in examining responses of terrestrial ecosystems to climate variability, elevated atmospheric CO2, and disturbance events. Her research focuses on integrating field observations, remote sensing data, and process-based models to quantify and predict ecosystem water, energy, carbon fluxes, productivity, and demography. -------------- Ming Ye, Ph.D. Professor in Hydrogeology Department of Earth, Ocean, and Atmospheric Science Department of Scientific Computing Office: 3015 EOAS Building (1011 Academic Way) Phone: 850-645-4987 Florida State University Tallahassee, FL 32306-4520 Email: mye at fsu.edu http://earth.eoas.fsu.edu/~mye/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Mar 31 16:27:45 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 31 Mar 2025 20:27:45 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Leo Liu Message-ID: "Decoding Heart Attacks and Strokes with Supercomputing and AI" Leo Liu Assistant Professor, Chemical and Biomedical Engineering, FAMU-FSU College of Engineering 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 in our 499 Dirac Science Library (DSL) Seminar Room. 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 2, 2025, 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: Heart attacks and strokes cause 1/3 of death in the modern world, which stem from a process called arterial thrombosis where clot forms abruptly in a narrowed artery obstructing blood flow. Current anti-thrombotic pharmaceuticals targeting biochemistry remain largely ineffective while leading to excessive bleeding risks. Our recent studies have led to evidence showing thrombosis is primarily controlled by a biophysical process of cells and proteins aggregating through high-shear hemodynamics. Decoding the biophysical mechanisms of arterial thrombosis in multiscale can lead to novel preventive strategies for successful longevity. In this colloquium talk, I will cover how we develop multiscale computational models suitable for driving first-principle based understanding of arterial thrombosis at multiple scales spanning from molecular, cellular to tissue levels. I will show how we combine multiscale computation as well as AI on in silico supercomputing chips and whole blood experiments on in vitro fluidic chips to form a powerful engine to drive scientific discovery. I will also discuss how novel treatment, and potential medical devices may be inspired from the unconventional biophysics predicted by our in silico and in vitro models. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1867-colloquium-with-leo-liu-2025-04-02 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 5247 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