From eoas-seminar at lists.fsu.edu Tue Feb 4 08:01:33 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 4 Feb 2025 13:01:33 +0000 Subject: [Eoas-seminar] Reminder: MET Seminar TODAY 3 PM Dr. Bor-Ting Jong (Princeton University/NOAA GFDL) In-Reply-To: References: Message-ID: Dear all, This is a reminder of the MET seminar today at 3 PM in 1044 and on Zoom, given by Dr. Bor-Ting Jong of Princeton University/NOAA GFDL. Dr. Jong will speak about "Increases in Extreme Precipitation over the Northeast United States using 25-km GFDL SPEAR Ensemble? There will be snacks just before the seminar, so come a few minutes early to hang out and have some refreshments! Hope to see you all 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 Jan 30, 2025, at 9:40?AM, eoas-seminar--- via Eoas-seminar wrote: Dear all, We are pleased to announce our first Meteorology Seminar of the semester! Please join us for next week?s MET seminar on Tuesday February 4 at 3 PM, which will be given by Dr. Bor-Ting Jong of Princeton University/NOAA GFDL. Dr. Jong will speak about "Increases in Extreme Precipitation over the Northeast United States using 25-km GFDL SPEAR Ensemble? (abstract below). Dr. Jong 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. Please join a few minutes early for refreshments before the start of the seminar. Dr. Jong is also available for individual Zoom meetings on Tuesday. Her research focuses on regional hydro climate variability and extremes, and their connections to the large-scale atmospheric circulation from sub seasonal to decadal and longer time scales. If you?d like to meet her, please contact Allison Wing. DATE: Tuesday February 4 SEMINAR TIME: 3-4 PM, please join early for refreshments SEMINAR LOCATION: EOA 1044 (Speaker remote) SPEAKER: Dr. Bor-Ting Jong TITLE: Increases in Extreme Precipitation over the Northeast United States using 25-km GFDL SPEAR Ensemble ABSTRACT: Simulating regional extreme precipitation remains challenging, partially limited by climate models? horizontal resolution. Our recent work, using the ensembles generated by GFDL (Geophysical Fluid Dynamics Laboratory) SPEAR (Seamless System for Prediction and EArth System Research) models, shows that a model with 25 km horizontal resolution facilitates a much more realistic simulation of extreme precipitation than comparable models with 50 or 100 km resolution. We take the Northeast United States as an example as the Northeast US has faced the most rapidly increasing occurrences of extreme precipitation within the US in the past few decades. The 25-km GFDL-SPEAR ensemble simulates the trend of Northeast US extreme precipitation quantitatively consistent with observed trend over recent decades. We therefore use the same model for assessments of meteorological factors, including atmospheric rivers (AR) and tropical cyclone (TC)-related events, that have contributed to the trend of extreme precipitation over the Northeast US and future projections. I will show that the increasing extreme precipitation over the Northeast US since the 1990s were mainly linked to TC-related events, especially extratropical transitions. In the future warming climate, both AR-related and TC-related extreme precipitation over the Northeast US are projected to increase, even though the numbers of TC in the North Atlantic are projected to decrease in the 25-km GFDL-SPEAR SSP5-8.5 simulations. ?????????????????? 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 Thu Feb 6 08:00:04 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 6 Feb 2025 13:00:04 +0000 Subject: [Eoas-seminar] MET Seminar - Tuesday February 11 - Dr. Wei-Ting Hsiao (FSU) Message-ID: Dear all, Please join us for next week?s MET seminar on Tuesday February 11 at 3 PM, which will be given by Dr. Wei-Ting Hsiao, who is a postdoctoral scholar here in EOAS. Dr. Hsiao will speak about "Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation? (abstract below). Dr. Hsiao will be presenting his seminar in person in 1044, but 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. Dr. Hsiao primarily works remotely but is here in Tallahassee until February 21, so please reach out to him (whsiao at fsu.edu) if you?d like to schedule a meeting while he is here. DATE: Tuesday February 11 SEMINAR TIME: 3-4 PM, please join early for refreshments SEMINAR LOCATION: EOA 1044 SPEAKER: Dr. Wei-Ting Hsiao TITLE: Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation ABSTRACT: The presence of high-altitude anvil clouds produced by tropical deep convection imposes radiative heating on the surface and the atmosphere, which modulates the Earth?s energy budget. These cloud-radiative effects (CREs) were proposed to support the organization of convective systems themselves which produce high clouds. At the same time, we also speculate that convective organization feeds back on modulating the CREs. Such convective-radiative feedback involving the two-way interaction between convective organization and CREs is not well understood. We ask the following questions: What determines the strength of the convective-radiative feedback? And how do the CREs promote convectively coupled variabilities in the observed tropics? The presentation will show our studies attempting to tackle these questions using a set of observation-derived data products, including retrievals using spaceborne satellites, ground-based precipitation radar, and reanalyses. Our findings suggest that the strength of the radiative feedback changes with space and time, and may be dependent on the organization of convection. Stronger feedback tends to be coupled with a higher degree of mesoscale convective organization, further supported by higher sea surface temperature and stronger low-level wind shear. How radiative feedback helps maintain a dominant mode of tropical intraseasonal variability, the Madden-Julian oscillation, is examined as an example showing how such mesoscale-modulated radiative feedback may have an upscale influence on atmospheric variability at larger scales. -------------------------------------------- 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 Feb 7 16:16:31 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 7 Feb 2025 21:16:31 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Luna Hiron Message-ID: "The influence of vertical resolution on internal tide energetics and subsequent effects on underwater acoustic propagation" Luna Hiron Center for Ocean-Atmospheric Prediction Studies (COAPS), 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, Feb 12, 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: Internal tides are waves that form when tides interact with underwater sloping topography, causing undulation along interfaces between water layers of different densities. Internal tide generation and breaking play a primary role in the vertical transport and mixing of heat and other properties in the ocean interior, thereby influencing climate regulation. Additionally, internal tides increase sound speed variability in the ocean, consequently impacting underwater acoustic propagation. With advancements in large-scale ocean modeling capabilities, it is essential to assess the impact of higher model resolutions (horizontal and vertical) in representing internal tides. This study investigates the influence of vertical resolution on internal tide energetics and its subsequent effects on underwater acoustic propagation in the HYbrid Coordinate Ocean Model (HYCOM). An idealized configuration with a ridge, forced only by semidiurnal tides and having 1-km horizontal grid-spacing, is used to test two different vertical-grid discretizations, defined based on the zero-crossings of horizontal velocity eigenfunctions and the merging of consecutive layers, with seven distinct numbers of isopycnal layers, ranging from 8 to 128. Analyses reveal that increasing the number of layers (up to 48 in this case) increases barotropic-to-baroclinic tidal conversion, available potential energy, and vertical kinetic energy, converging with higher layer counts. Vertical shear exhibits a similar pattern but converges at 96 layers. Finally, sound speed variability and acoustic parameters differ for simulations with less than 48 layers. Therefore, the study concludes that a minimum vertical resolution (48 layers in this case) is required in isopycnal models to accurately represent internal tide properties and associated underwater acoustic propagation. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1855-colloquium-with-luna-hiron-2025-02-12 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 5942 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 Feb 10 11:24:57 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 10 Feb 2025 11:24:57 -0500 Subject: [Eoas-seminar] Carothers Roundtable on "Navigating Faculty Life with Aging Family and Caregiving" In-Reply-To: References: Message-ID: Hands for Caregivers *This message is approved by Dr. Janet Kistner, Vice President, Office of Faculty Development and Advancement* */How can we thrive as caregivers for elders? What do the experts say, and what resources can FSU provide? /* The Office of Faculty Development and Advancement and the Pepper Center are hosting a Caregiving Panel through the Carothers Luncheon Series on "Navigating Faculty Life with Aging Family and Caregiving,? in the Broad Auditorium in the?Claude Pepper Building (636 W. Call Street) on *Tuesday, March 4, 2025, from 12-1:30 p.m*. Please join us for a discussion with a panel of experts, including Dawn Carr, gerontologist and director of the Claude Pepper Center; Miles Taylor, sociologist and director of the Pepper Institute on Aging and Public Policy; Lynn Panton, exercise physiologist and director of the new "Exercise as Medicine" initiative; and Sandy Lyall, a licensed certified mental health counselor (LCMHC) and director of the Employee Assistance Program (EAP). Professor Annika A. Culver, Faculty Fellow in the Office of Faculty Development and Advancement, will introduce our participants, who will discuss their latest research and FSU resources, followed by Q and A from the audience. 12:00-12:15 p.m. Introductory Remarks 12:15-1:00 p.m. Panel remarks 1:00-1:30 p.m. Audience Q & A Please *REGISTER?HERE* ** for this event by *_February 28th_*, we look forward to the conversation! *Office of Faculty Development and Advancement | Florida State University* *222 S. Copeland Street | Westcott Building* *Suite 211 | Tallahassee, FL 32306* *Phone: 850.644.5196 * *Fax: 850.644.0172* ** *Keep up with us on social media!* /"Please note: Florida has very broad public records laws. Most written communications to or from state/university employees and students are public records and available to the public and media upon request. Your e-mail communications may therefore be subject to public disclosure."/ -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image002.jpg Type: image/jpeg Size: 33845 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image003.png Type: image/png Size: 1042 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image004.png Type: image/png Size: 1090 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image005.png Type: image/png Size: 55297 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Tue Feb 11 00:06:23 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 11 Feb 2025 05:06:23 +0000 Subject: [Eoas-seminar] TODAY 3 PM - MET Seminar - Dr. Wei-Ting Hsiao (FSU) In-Reply-To: References: Message-ID: Dear all, This is a reminder of today?s MET seminar, given by Dr. Wei-Ting Hsiao who will speak about "Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation?. See you in 1044! Talk at 3 pm, come a few minutes early for refreshments. 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 Feb 6, 2025, at 8:00?AM, eoas-seminar--- via Eoas-seminar wrote: Dear all, Please join us for next week?s MET seminar on Tuesday February 11 at 3 PM, which will be given by Dr. Wei-Ting Hsiao, who is a postdoctoral scholar here in EOAS. Dr. Hsiao will speak about "Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation? (abstract below). Dr. Hsiao will be presenting his seminar in person in 1044, but 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. Dr. Hsiao primarily works remotely but is here in Tallahassee until February 21, so please reach out to him (whsiao at fsu.edu) if you?d like to schedule a meeting while he is here. DATE: Tuesday February 11 SEMINAR TIME: 3-4 PM, please join early for refreshments SEMINAR LOCATION: EOA 1044 SPEAKER: Dr. Wei-Ting Hsiao TITLE: Radiative Feedbacks in Tropical Convective Organization and the Madden-Julian Oscillation ABSTRACT: The presence of high-altitude anvil clouds produced by tropical deep convection imposes radiative heating on the surface and the atmosphere, which modulates the Earth?s energy budget. These cloud-radiative effects (CREs) were proposed to support the organization of convective systems themselves which produce high clouds. At the same time, we also speculate that convective organization feeds back on modulating the CREs. Such convective-radiative feedback involving the two-way interaction between convective organization and CREs is not well understood. We ask the following questions: What determines the strength of the convective-radiative feedback? And how do the CREs promote convectively coupled variabilities in the observed tropics? The presentation will show our studies attempting to tackle these questions using a set of observation-derived data products, including retrievals using spaceborne satellites, ground-based precipitation radar, and reanalyses. Our findings suggest that the strength of the radiative feedback changes with space and time, and may be dependent on the organization of convection. Stronger feedback tends to be coupled with a higher degree of mesoscale convective organization, further supported by higher sea surface temperature and stronger low-level wind shear. How radiative feedback helps maintain a dominant mode of tropical intraseasonal variability, the Madden-Julian oscillation, is examined as an example showing how such mesoscale-modulated radiative feedback may have an upscale influence on atmospheric variability at larger scales. -------------------------------------------- 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 Thu Feb 13 14:01:29 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 13 Feb 2025 19:01:29 +0000 Subject: [Eoas-seminar] Seminar by Joe LaCasce "Rossby waves over bathymetry" Monday February 24 at COAPS Message-ID: Please mark your calendars. Seminar by Joe LaCasce "Rossby waves over bathymetry" Monday February 24 at COAPS Abstract: Topography plays a central role in ocean dynamics, but our intuition is nevertheless based largely on flat bottom models. This includes aspects like the baroclinic modes used for representing vertical structure and the character of baroclinic instability. A good example is Rossby waves, whose vertical structure and stability are both affected by bathymetry. Relatively modest topography causes the waves to be surface-trapped, which in turn alters their deformation radius and propagation speed. Rossby waves are also baroclinically unstable and this too is altered by bathymetry. If the topographic heights are large enough, energy is transferred directly to topographically-locked flows rather than to the most unstable wave found over a flat bottom. The resulting turbulent flow is also affected by bathymetry, with the deep flow slaved to topography and compensated surface eddies. The resulting flows strongly resemble those in the ocean interior, with westward propagation at the surface and deep gyres. --- 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 Feb 13 14:17:07 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 13 Feb 2025 14:17:07 -0500 Subject: [Eoas-seminar] Seminar by Joe LaCasce "Rossby waves over bathymetry" Monday February 24 at COAPS at 2pm In-Reply-To: References: Message-ID: My apologies - time was missing. *2pm* Monday February 24 On 2/13/2025 2:01 PM, eoas-seminar--- via Eoas-seminar wrote: > Please mark your calendars. > > Seminar by Joe LaCasce "Rossby waves over bathymetry" Monday February > 24 at *COAPS* > > *Abstract: *? Topography plays a central role in ocean dynamics, but > our intuition is nevertheless based largely on flat bottom models. > This includes aspects like the baroclinic modes used for representing > vertical structure and the character of baroclinic instability. A good > example is Rossby waves, whose vertical structure and stability are > both affected by bathymetry. Relatively modest topography causes the > waves to be surface-trapped, which in turn alters their deformation > radius and propagation speed. Rossby waves are also baroclinically > unstable and this too is altered by bathymetry. If the topographic > heights are large enough, energy is transferred directly to > topographically-locked flows rather than to the most unstable wave > found over a flat bottom. The resulting turbulent flow is also > affected by bathymetry, with the deep flow slaved to topography and > compensated surface eddies. The resulting flows strongly resemble > those in the ocean interior, with westward propagation at the surface > and deep gyres. > > > > --- > 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 > https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.coaps.fsu.edu%2F&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C33a6b013f29648e33a6608dd4c6302dc%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638750710306758457%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=TRKrvvyT%2FUR98%2FXs5dAioiOv8YSaw8Lmn00oBh6hct0%3D&reserved=0 > > > _______________________________________________ > 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%7Ceoas-seminar%40lists.fsu.edu%7C33a6b013f29648e33a6608dd4c6302dc%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638750710306797232%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=8mmBek3OM202uptssMbXKWvMQBGO6sg0XV7HC%2FWa1Rg%3D&reserved=0 -- 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 https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.coaps.fsu.edu%2F&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C33a6b013f29648e33a6608dd4c6302dc%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638750710306806854%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=jDf2Ltd%2FDSjEXI7qv78CiSEk0dZlzGmefjBtZSHKjfA%3D&reserved=0 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Thu Feb 13 16:23:57 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 13 Feb 2025 21:23:57 +0000 Subject: [Eoas-seminar] Seminar by Jonathan Christophersen (NRL) "Oceanic Rossby Wave Predictability" Monday March 3 at 1 pm at COAPS Message-ID: Hi everyone, I am pleased to share that Dr. Jonathan Christophersen, a Meteorologist at the Naval Research Laboratory in Monterey and an FSU alumni, will be visiting FSU and giving a presentation on Monday, March 3rd, at 1:00 PM ET. He will share his work on oceanic Rossby waves (more details below). The presentation will take place at COAPS, with remote access available for those unable to attend in person. A Zoom link will be shared closer to the date. Oceanic Rossby Wave Predictability in ECMWF?s Subseasonal-to-Seasonal Reforecasts In recent years, studies have put forth various theories and findings on the role of oceanic equatorial Rossby waves (OERW) in the subseasonal-to-seasonal (S2S) predictability of the Indian Ocean (IO). While much of the scientific literature uses data from in-situ, satellite, and/or reanalysis datasets, this study focuses on reforecast fields from the European Centre for Medium-Range Weather Forecasting?s (ECMWF) S2S dataset. Evaluation of the model?s predictive skill in representing OERWs and the associated variations in sub-surface-to-surface interaction and air-sea coupling are discussed. This work provides a unique methodology to calculate and evaluate the predictability of OERWs from model forecast data, which, to the author?s knowledge, is the first of its kind to do so. Our results indicate that the model forecasts OERWs with relatively high skill (anomaly correlation > 0.5 out to 40 days), indicating they are a key source of oceanic subseasonal predictability at extended lead times. Analysis of the wavenumber-frequency spectra for the IO indicates a reduction in power throughout the model forecast time period in the oceanic equatorial Kelvin wave (OEKW) regime, indicating the potential misrepresentation of the zonal winds. This erroneous weakening of the OEKWs is attributed to the weakening of the reflected oceanic equatorial Rossby waves (OERWs). This results in weaker transport of the associated westward advection of warm ocean heat content (OHC) anomalies via the OERWs, which has numerous implications for air-sea and sub-surface-to-surface coupling, as will be discussed. In general, the atmospheric response to the waning westward transport of OHC anomalies in the western IO is associated with the weakening of precipitation anomalies related to the diminishing intraseasonal oscillation. Best regards, Luna Hiron Assistant Research Scientist Center for Ocean-Atmospheric Prediction Studies (COAPS) Florida State University ? https://lunahiron.github.io -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: JAC_CV_2page_2_13_2025.pdf Type: application/pdf Size: 170631 bytes Desc: JAC_CV_2page_2_13_2025.pdf URL: From eoas-seminar at lists.fsu.edu Fri Feb 14 15:56:49 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 14 Feb 2025 20:56:49 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Pankaj Chouhan Message-ID: "Predicting Suitable Habitats for Pest Insects in the Continental US Under Current and Future Climate Conditions Using Maxent" Pankaj Chouhan Department of Scientific Computing, 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, Feb 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: The spread of pest insect species poses major challenges to agriculture, forestry, and biodiversity. The Food and Agriculture Organization of the United Nations estimates that pests cause 20?40% of global crop losses annually, valued at over $290 billion. To mitigate these losses, understanding where these pests might spread?especially in response to climate change?is crucial for proactive management and food security. Species distribution modeling (SDM) is a powerful tool for predicting where species are likely to thrive. One widely used method is Maxent, a machine learning-based ecological model. In this talk, I will present a study that predicts suitable habitats for three key pest insect species in the continental United States: * Brown Marmorated Stink Bug (Halyomorpha halys) * Corn Earworm (Helicoverpa zea) * Root Weevil (Diaprepes abbreviatus) Our models integrate pest occurrence records with crop data, bioclimatic variables, and elevation profiles to estimate current habitat suitability. We also analyze key factors driving these changes, highlighting the importance of careful model design?particularly the selection of background points, a crucial aspect of Maxent modeling that can influence results. Our findings emphasize the need to incorporate future climate scenarios into pest management strategies, offering valuable insights to enhance agricultural resilience and ecological sustainability. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1857-colloquium-with-pankaj-chouhan-2025-02-19 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 5526 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 Feb 18 11:14:31 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 18 Feb 2025 16:14:31 +0000 Subject: [Eoas-seminar] Oceanography Defense - Christian Fender - Feb. 25, 1:00 Message-ID: Oceanography Ph.D. Defense Christian Fender Biological Oceanography Major Professor: Mike Stukel Time and Date: 1:00 PM on Feb 25, 2025 Location: EOAS 2061 TITLE: Visualizing the vacuum: Microscopic insights into salp feeding and ecology ABSTRACT: Salps are a group of pelagic tunicates with widespread distributions and the potential to strongly impact ecosystem dynamics through their rapid reproduction, carbon export, and filtration rates. Like most filter feeders, they are considered to be nonselective in their feeding such that different species are sometimes considered ecologically equivalent. However, recent reports of differences in the proportions of prey types in salp diets compared to prey availability have challenged this paradigm. Here we investigate the feeding habits, preferences, and their implications for 7 species from the Southwest Pacific east of New Zealand: Salpa thompsoni, Thetys vagina, Thalia democratica, Salpa fusiformis, Ihlea magalhanica, Soestia zonaria, and Pegea confoederata. Our dataset encompasses 58 individuals representing a variety of sizes and both life stages, allowing us to examine how they impact feeding. Scanning electron microscopy was used to examine the gut contents of 58 individuals, which were then compared to water column plankton communities characterized via epifluorescence microscopy, FlowCam, and flow cytometry. We compare the size and taxon-selectivity of these taxa and also explore the ecosystem impacts of a salp bloom and their implications for fisheries production. For those who cannot attend in person, a zoom link is provided below: Michael Stukel is inviting you to a scheduled Zoom meeting. Topic: Christian Fender Ph.D. Defense Time: Feb 25, 2025 01:00 PM Eastern Time (US and Canada) Join Zoom Meeting https://fsu.zoom.us/j/98482770651 Meeting ID: 984 8277 0651 --- One tap mobile +13052241968,,98482770651# US +16469313860,,98482770651# US --- Dial by your location ? +1 305 224 1968 US ? +1 646 931 3860 US ? +1 301 715 8592 US (Washington DC) ? +1 309 205 3325 US ? +1 312 626 6799 US (Chicago) ? +1 646 558 8656 US (New York) ? +1 719 359 4580 US ? +1 253 205 0468 US ? +1 253 215 8782 US (Tacoma) ? +1 346 248 7799 US (Houston) ? +1 360 209 5623 US ? +1 386 347 5053 US ? +1 507 473 4847 US ? +1 564 217 2000 US ? +1 669 444 9171 US ? +1 669 900 9128 US (San Jose) ? +1 689 278 1000 US Meeting ID: 984 8277 0651 Find your local number: https://fsu.zoom.us/u/aQ4Ao4fkF --- Join by SIP ? 98482770651 at zoomcrc.com --- Join by H.323 ? 144.195.19.161 (US West) ? 206.247.11.121 (US East) ? 115.114.131.7 (India Mumbai) ? 115.114.115.7 (India Hyderabad) ? 159.124.15.191 (Amsterdam Netherlands) ? 159.124.47.249 (Germany) ? 159.124.104.213 (Australia Sydney) ? 159.124.74.212 (Australia Melbourne) ? 170.114.180.219 (Singapore) ? 64.211.144.160 (Brazil) ? 159.124.132.243 (Mexico) ? 159.124.168.213 (Canada Toronto) ? 159.124.196.25 (Canada Vancouver) ? 170.114.194.163 (Japan Tokyo) ? 147.124.100.25 (Japan Osaka) Meeting ID: 984 8277 0651 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Feb 19 14:45:42 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 19 Feb 2025 19:45:42 +0000 Subject: [Eoas-seminar] Announcing the 2025 Werner A. Baum Lecture Message-ID: Dear all, I am pleased to announce the 2025 Werner A. Baum Lecture, to be held Friday March 21 at 3 PM in EOA 1050. The lecture will be given by climate scientist Dr. Tiffany Shaw, professor at the University of Chicago who will speak about how atmospheric circulation extremes response to climate change. More information is on the attached flyer. We look forward to having a great turnout for what promises to be a fascinating lecture given by a dynamic speaker. Prof. Shaw will be visiting EOAS in the afternoon on Thursday March 20 and throughout the day on Friday March 21, and there will be opportunities for faculty, researchers, and students to meet with her. I will be arranging her schedule of meetings as we get closer to the date. Please feel free to forward to this announcement to other colleagues of yours who might be interested in attending the lecture. Cheers, Allison ?????????????????? 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: -------------- next part -------------- A non-text attachment was scrubbed... Name: 2025 - Baum Lecture - Flyer - 2.pdf Type: application/pdf Size: 160904 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: 1364 bytes Desc: not available URL: From eoas-seminar at lists.fsu.edu Fri Feb 21 09:13:44 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 21 Feb 2025 14:13:44 +0000 Subject: [Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Hamza Ruzayqat Message-ID: "Stochastic Filtering in High Dimensions" Hamza Ruzayqat Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST) 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, Feb 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: Data assimilation, also known as stochastic filtering, seeks to learn/estimate the evolving state of a physical system by combining a mathematical model with partial and noisy real observations. This process is formulated as a state-space model (SSM), where the objective is to refine state estimates and enhance future predictions in real-time applications (e.g. weather forecasting). However, filtering high-dimensional, nonlinear SSMs presents significant computational challenges. Particle filters offer an exact solution in theory, but their practical implementation suffers from the curse of dimensionality, requiring an exponentially large number of samples, $N = O(\kappa^d)$, with $\kappa > 1$. This makes them computationally prohibitive. An alternative is to use Markov Chain Monte Carlo (MCMC) sampling to generate realizations from the filtering distribution. However, since this distribution incorporates the entire state history up to the current time, MCMC?s computational complexity increases linearly with time, limiting its efficiency in real-time settings. In this talk, I will introduce two novelfiltering techniques designed to alleviate these computational burdens. The first replaces the standard smoothing distribution with a lagged approximation, effectively reducing dependencies between states. This modification, which integrates particle filtering with sequential Monte Carlo samplers, introduces a small bias that remains controlled in both dimension and time while ensuring a computational cost that grows polynomially with $d$. The second method utilizes sequential MCMC (SMCMC) to sample from a particular approximation of the filtering distribution, which is shown to be asymptotically exact. In many cases, the cost of this new algorithm scales linearly with $d$. Additionally, I will present a localized version of SMCMC that significantly reduces computational cost in cases where the available data is very sparse or highly localized. Additional colloquium details can be found here, https://www.sc.fsu.edu/news-and-events/colloquium/1858-colloquium-with-hamza-ruzayqat-2025-02-26 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/calendar Size: 6046 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 Fri Feb 21 14:00:23 2025 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 21 Feb 2025 14:00:23 -0500 Subject: [Eoas-seminar] Reminder: Seminar by Joe LaCasce "Rossby waves over bathymetry" Monday February 24 at COAPS Room 255 at 2pm In-Reply-To: References: Message-ID: For those of you who cannot attend in person, here is a zoom link: https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Ffsu.zoom.us%2Fj%2F92095138400&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C1d1b131b0fc04c29f37708dd52a9ffe1%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638757612269102457%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=tTUscC6CAH290drfMvugLBlBdgpGhs%2Bq8wRL0QeLU%2BI%3D&reserved=0 See you Monday. Eric > > > Seminar by Joe LaCasce "Rossby waves over bathymetry" Monday February > 24 in room 255 at *COAPS (2pm) > * > > *Abstract: *? Topography plays a central role in ocean dynamics, but > our intuition is nevertheless based largely on flat bottom models. > This includes aspects like the baroclinic modes used for representing > vertical structure and the character of baroclinic instability. A good > example is Rossby waves, whose vertical structure and stability are > both affected by bathymetry. Relatively modest topography causes the > waves to be surface-trapped, which in turn alters their deformation > radius and propagation speed. Rossby waves are also baroclinically > unstable and this too is altered by bathymetry. If the topographic > heights are large enough, energy is transferred directly to > topographically-locked flows rather than to the most unstable wave > found over a flat bottom. The resulting turbulent flow is also > affected by bathymetry, with the deep flow slaved to topography and > compensated surface eddies. The resulting flows strongly resemble > those in the ocean interior, with westward propagation at the surface > and deep gyres. > > > > --- > 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 > https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.coaps.fsu.edu%2F&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C1d1b131b0fc04c29f37708dd52a9ffe1%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638757612269119198%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=VazfAKOlSrqQN%2Bj7BzEBDLHYa4hEAR5p40%2BXGwa%2FL1A%3D&reserved=0 > > > _______________________________________________ > 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%7Ceoas-seminar%40lists.fsu.edu%7C1d1b131b0fc04c29f37708dd52a9ffe1%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638757612269136461%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=O1RGKkQDgKrTxDYxDku9oKbY9kSw9CT%2BlOKdMAmsBXI%3D&reserved=0 -- 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 https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.coaps.fsu.edu%2F&data=05%7C02%7Ceoas-seminar%40lists.fsu.edu%7C1d1b131b0fc04c29f37708dd52a9ffe1%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638757612269144633%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=R1%2FCPnijqliaOeJNy7zoeCqMQ9Kva5FU1d%2BpJtmdfT4%3D&reserved=0 -------------- next part -------------- An HTML attachment was scrubbed... URL: