From eoas-seminar at lists.fsu.edu Fri Jan 10 19:16:51 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sat, 11 Jan 2020 00:16:51 +0000 Subject: [Eoas-seminar] First Spring EOAS Colloquium Speaker Fri Jan 17 at 3:30 in 1044 EOA In-Reply-To: References: Message-ID: We will kick off our spring EOAS colloquium next Friday at 3:30 in 1044 EOA with our first speaker: Dr. Jolante Van Wijk New Mexico Institute of Mining and Technology What Creates the Unique Topography of East Africa? The elevation of East Africa is unusually high, commonly >3000 m above sea level. The elevation of a continent above sea level is generally related to the thick, low-density crust of the continents, plus contributions from tectonic events. In East Africa however, these two factors together cannot explain its high elevation. It has been suggested that a third component, called dynamic topography, may contribute to the high elevation in East Africa. Dynamic topography is caused by flow in Earth?s mantle. In this seminar, I will discuss dynamic topography, how theoretical models predict that it exists, and how we can quantify it. I will show how submarine unconformities can be used to quantify dynamic topography in oceanic basins. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Jan 15 12:38:35 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 15 Jan 2020 12:38:35 -0500 Subject: [Eoas-seminar] Distinguished Speaker Colloquium: Computational Fluid Dynamics Message-ID: Please see announcement below ------------- Dr. Vincent J.M. Salters Professor and Chair Department of Earth, Ocean and Atmospheric Sciences Labs at: Geochemistry Program of the National High Magnetic Field Laboratory Florida State University Tallahassee, Florida Phone: 850-644-1934, Skype: vsalters -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 20-0115 PATERSON, Eric MechE Distinguished Colloq speaker on Jan. 27, 20.pdf Type: application/pdf Size: 562348 bytes Desc: not available URL: -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Jan 17 08:19:25 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 17 Jan 2020 13:19:25 +0000 Subject: [Eoas-seminar] REMINDER TODAY First Spring EOAS Colloquium Speaker Fri Jan 17 at 3:30 in 1044 EOA In-Reply-To: References: Message-ID: We will kick off our spring EOAS colloquium TODAY at 3:30 in 1044 EOA with our first speaker: Dr. Jolante Van Wijk New Mexico Institute of Mining and Technology What Creates the Unique Topography of East Africa? The elevation of East Africa is unusually high, commonly >3000 m above sea level. The elevation of a continent above sea level is generally related to the thick, low-density crust of the continents, plus contributions from tectonic events. In East Africa however, these two factors together cannot explain its high elevation. It has been suggested that a third component, called dynamic topography, may contribute to the high elevation in East Africa. Dynamic topography is caused by flow in Earth?s mantle. In this seminar, I will discuss dynamic topography, how theoretical models predict that it exists, and how we can quantify it. I will show how submarine unconformities can be used to quantify dynamic topography in oceanic basins. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Jan 17 11:58:31 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 17 Jan 2020 16:58:31 +0000 Subject: [Eoas-seminar] MET seminars on Jan. 23 @ 3:30PM, LOV 353. Message-ID: Hi All, In the coming Thursday (Jan. 23), we will have the first MET seminar in this semester at regular seminar time and location (3:30 PM, LOV 353) in which Dr. Silvers will discuss cloud-circulation interaction. The title and abstract of his talk are (also see the attached seminar announcement flyer). Title: A mock-Walker Circulation and Radiative Convective Equilibrium: Clouds and Precipitation Abstract: The overturning tropical Pacific circulation known as the Walker circulation embodies complex interactions between large-scale circulations, deep and shallow convection, stratocumulus clouds, and microphysical cloud processes. The large-scale nature of the Walker circulation has made high-resolution modeling costly, while understanding the feedbacks between parameterized clouds and the large-scale circulation have remained challenging in the context of global models. This study uses an idealized Walker circulation to explore how multiple tropical cloud types interact with a large-scale circulation. A high-resolution model with explicit convection (1km and 2km grid-spacing) is used to examine the system free of the complications inherent in convective parameterizations. The same model is also used at GCM-like resolutions with parameterized convection (25km and 100km grid-spacing) to gain insight into how the clouds and circulations interact in a configuration similar to a GCM. The interaction between clouds and the longwave radiation increases, or decreases, precipitation depending on whether high or low clouds are dominant. Interactions between the longwave radiation and parameterized convection result in the precipitation maximum being shifted off of the SST maximum. Cloud resolving simulations result in stronger overturning, more condensate aloft, and a relative humidity that is 40% higher in the deep convective regions than it is for GCM-like simulations. This configuration can also be used as a bridge between experiments of radiative convective equilibrium and those with more complex boundary conditions. We argue that a mock-Walker Circulation is an ideal framework with which to build on the insight we have gained from RCE experiments and we are optimistic that it can help us to solve some of the more persistent questions about how clouds and the large-scale circulation interact. Look forward to meeting you Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Silver.pdf Type: application/pdf Size: 1008212 bytes Desc: MET_Seminar_Flyer_Silver.pdf URL: From eoas-seminar at lists.fsu.edu Fri Jan 17 12:12:13 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 17 Jan 2020 17:12:13 +0000 Subject: [Eoas-seminar] EOAS colloquium in the afternoon of Friday, Jan. 24 (@ 3:30 PM. EOA 1044) Message-ID: Hi All, In the coming Friday (Jan. 24, @ 3:30 PM. EOA 1044), the EOAS colloquium will have Prof. Kevin Reed of the Stony Brook University as the speaker (3:30 PM, LOV 353). The title and abstract of his talk are (also see the attached seminar announcement flyer). Title: Exploring Climate Change Impacts on Tropical Cyclones Abstract: The next century will see unprecedented changes to the climate system with direct consequences for society. As stated in the National Climate Assessment, ?changes in extreme weather events are the primary way that most people experience climate change.? In this sense, the characteristics of extreme weather are key indicators of climate change impacts, at both local and regional scales. Understanding potential changes in the location, intensity and structure of such extremes (e.g., tropical cyclones, severe thunderstorms and flooding) is crucial in planning for future adaptation as these events have large economic and social costs. The goal of this work is to better understand climate impacts on tropical cyclones in various high-resolution configurations of the Community Atmosphere Model (CAM) run at horizontal grid spacings of approximately 28 km and forced with prescribed sea-surface temperatures and greenhouse gas concentrations for past, present, and future climates. This analysis will include the evaluation of conventional (AMIP-style) decadal simulations typical of climate models, short 7-day ensemble hindcasts of recent devastating events, and reduced complexity simulations of idealized states of the climate system. Through this hierarchical modeling approach the impact of climate change on the characteristics (frequency, intensity, rainfall, etc.) of extreme weather, including tropical cyclones, can be quantified. Look forward to meeting you there. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Jan 17 12:26:36 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 17 Jan 2020 17:26:36 +0000 Subject: [Eoas-seminar] EOAS colloquium in the afternoon of Friday, Jan. 24 (@ 3:30 PM. EOA 1044) In-Reply-To: <17359744-E705-46B6-9049-4186854A88B7@fsu.edu> References: <17359744-E705-46B6-9049-4186854A88B7@fsu.edu> Message-ID: Just to provide more details, Prof. Reed studies how extreme events, such as tropical cyclones and severe convective storms, may be altered in a changing climate. He leads the Climate Extremes Modeling Group at Stony Brook University, where his group uses current and next-generation climate models, as well as simplified, reduced complexity modeling frameworks, to study extreme weather events in a global context. If you?d like to meet with Prof. Reed on Friday January 24, please contact me (awing at fsu.edu) Cheers, Allison On Jan 17, 2020, at 12:16 PM, Allison Wing > wrote: Dear all, If you would like to meet with Prof. Reed, please contact me (awing at fsu.edu). Thanks, Allison On Jan 17, 2020, at 12:12 PM, eoas-seminar--- via Eoas-seminar > wrote: Hi All, In the coming Friday (Jan. 24, @ 3:30 PM. EOA 1044), the EOAS colloquium will have Prof. Kevin Reed of the Stony Brook University as the speaker (3:30 PM, LOV 353). The title and abstract of his talk are (also see the attached seminar announcement flyer). Title: Exploring Climate Change Impacts on Tropical Cyclones Abstract: The next century will see unprecedented changes to the climate system with direct consequences for society. As stated in the National Climate Assessment, ?changes in extreme weather events are the primary way that most people experience climate change.? In this sense, the characteristics of extreme weather are key indicators of climate change impacts, at both local and regional scales. Understanding potential changes in the location, intensity and structure of such extremes (e.g., tropical cyclones, severe thunderstorms and flooding) is crucial in planning for future adaptation as these events have large economic and social costs. The goal of this work is to better understand climate impacts on tropical cyclones in various high-resolution configurations of the Community Atmosphere Model (CAM) run at horizontal grid spacings of approximately 28 km and forced with prescribed sea-surface temperatures and greenhouse gas concentrations for past, present, and future climates. This analysis will include the evaluation of conventional (AMIP-style) decadal simulations typical of climate models, short 7-day ensemble hindcasts of recent devastating events, and reduced complexity simulations of idealized states of the climate system. Through this hierarchical modeling approach the impact of climate change on the characteristics (frequency, intensity, rainfall, etc.) of extreme weather, including tropical cyclones, can be quantified. Look forward to meeting you there. Cheers, Zhaohua _______________________________________________ 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 Jan 17 12:28:25 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 17 Jan 2020 17:28:25 +0000 Subject: [Eoas-seminar] MET seminars on Jan. 23 @ 3:30PM, LOV 353. In-Reply-To: References: Message-ID: Dear all, If you?d like to meet with Dr. Levi Silvers (Stony Brook University), please contact me (awing at fsu.edu). Dr. Silvers studies the contribution of clouds to the global energy budget, and also has interests in large-scale dynamics, radiative-convective equilibrium, climate change, and the development of general circulation models. More information can be found on his website: https://scholar.princeton.edu/levigsilvers/home Cheers, Allison On Jan 17, 2020, at 11:58 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi All, In the coming Thursday (Jan. 23), we will have the first MET seminar in this semester at regular seminar time and location (3:30 PM, LOV 353) in which Dr. Silvers will discuss cloud-circulation interaction. The title and abstract of his talk are (also see the attached seminar announcement flyer). Title: A mock-Walker Circulation and Radiative Convective Equilibrium: Clouds and Precipitation Abstract: The overturning tropical Pacific circulation known as the Walker circulation embodies complex interactions between large-scale circulations, deep and shallow convection, stratocumulus clouds, and microphysical cloud processes. The large-scale nature of the Walker circulation has made high-resolution modeling costly, while understanding the feedbacks between parameterized clouds and the large-scale circulation have remained challenging in the context of global models. This study uses an idealized Walker circulation to explore how multiple tropical cloud types interact with a large-scale circulation. A high-resolution model with explicit convection (1km and 2km grid-spacing) is used to examine the system free of the complications inherent in convective parameterizations. The same model is also used at GCM-like resolutions with parameterized convection (25km and 100km grid-spacing) to gain insight into how the clouds and circulations interact in a configuration similar to a GCM. The interaction between clouds and the longwave radiation increases, or decreases, precipitation depending on whether high or low clouds are dominant. Interactions between the longwave radiation and parameterized convection result in the precipitation maximum being shifted off of the SST maximum. Cloud resolving simulations result in stronger overturning, more condensate aloft, and a relative humidity that is 40% higher in the deep convective regions than it is for GCM-like simulations. This configuration can also be used as a bridge between experiments of radiative convective equilibrium and those with more complex boundary conditions. We argue that a mock-Walker Circulation is an ideal framework with which to build on the insight we have gained from RCE experiments and we are optimistic that it can help us to solve some of the more persistent questions about how clouds and the large-scale circulation interact. Look forward to meeting you Cheers, Zhaohua _______________________________________________ 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 Jan 21 14:17:50 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 21 Jan 2020 19:17:50 +0000 Subject: [Eoas-seminar] EOAS colloquium in the afternoon of Friday, Jan. 24 (@ 3:30 PM. EOA 1044) Message-ID: Hi All, In the coming Friday (Jan. 24, @ 3:30 PM. EOA 1044), the EOAS colloquium will have Prof. Kevin Reed of the Stony Brook University as the speaker. It will be at EOA 1044! (Sorry for making a mistake by listing two rooms in the last message.) The title and abstract of his talk are (also see the attached seminar announcement flyer). Title: Exploring Climate Change Impacts on Tropical Cyclones Abstract: The next century will see unprecedented changes to the climate system with direct consequences for society. As stated in the National Climate Assessment, ?changes in extreme weather events are the primary way that most people experience climate change.? In this sense, the characteristics of extreme weather are key indicators of climate change impacts, at both local and regional scales. Understanding potential changes in the location, intensity and structure of such extremes (e.g., tropical cyclones, severe thunderstorms and flooding) is crucial in planning for future adaptation as these events have large economic and social costs. The goal of this work is to better understand climate impacts on tropical cyclones in various high-resolution configurations of the Community Atmosphere Model (CAM) run at horizontal grid spacings of approximately 28 km and forced with prescribed sea-surface temperatures and greenhouse gas concentrations for past, present, and future climates. This analysis will include the evaluation of conventional (AMIP-style) decadal simulations typical of climate models, short 7-day ensemble hindcasts of recent devastating events, and reduced complexity simulations of idealized states of the climate system. Through this hierarchical modeling approach the impact of climate change on the characteristics (frequency, intensity, rainfall, etc.) of extreme weather, including tropical cyclones, can be quantified. Look forward to meeting you there. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Jan 21 15:55:21 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 21 Jan 2020 20:55:21 +0000 Subject: [Eoas-seminar] Upcoming MET Seminars: Thurs Jan 23 & Tues Jan 28 Message-ID: Dear all, In addition to the Meteorology Seminar this Thursday (Jan 23; 3:30 PM 353 LOV) given by Dr. Levi Silvers, and the EOAS Colloquium this Friday (Jan 24; 3:30 PM 1044 EOA) given by Prof. Kevin Reed, we also have a special Meteorology Seminar next Tuesday (Jan 28; 3:30 PM 353 LOV) given by Dr. Tobias Becker of the Max Planck Institute for Meteorology. Dr. Becker will speak about the processes that control climate sensitivity in idealized simulations, including convective organization (title & abstract below, flyer attached). Dr. Becker is interested in the interaction of precipitating convection with the large-scale environment, convective organization, entrainment, and modeling (https://www.mpimet.mpg.de/en/staff/tobias-becker/research-interests/). Please contact Allison Wing (awing at fsu.edu) if you would like to meet with Dr. Becker (he is visiting Jan 22-29). There are also a couple spots remaining to meet with Dr. Silvers and Prof. Reed. Each will be on campus Jan 22-24. Cheers, Allison ============== Upcoming Seminars Meteorology Seminar by Dr. Levi Silvers (Thursday Jan 23, 3:30 PM 353 LOV) Title: A mock-Walker Circulation and Radiative Convecitve Equilibrium: Clouds and Precipitation EOAS Colloquium by Prof. Kevin Reed (Friday Jan 24, 3:30 PM 1044 EOA) Title: Exploring Climate Change Impacts on Tropical Cyclones Meteorology Seminar by Dr. Tobias Becker (Tuesday Jan 28, 3:30 PM 353 LOV) Title: Climate sensitivity across the RCEMIP simulations Abstract: Simulations of radiative-convective equilibrium (RCE) have greatly influenced the understanding of climate, and climate change. Early simulations were performed with very simple one-dimensional models of the atmosphere, followed by cloud-resolving simulations. In the last five years it has also become common practice to simulate RCE with comprehensive general circulation models. These recent studies have revealed that different RCE states can be found, depending on how convection aggregates, even in the absence of external asymmetries in the forcing, and have motivated the RCEMIP project, which defines a standardized experimental protocol, to study RCE across a range of models. For each RCEMIP model, simulations at fixed sea-surface temperatures of 295 K, 300 K and 305 K have been performed, both on a small and on a large domain. Here our focus is on investigating how climate sensitivity differs across those simulations, with the aim to understand what processes control climate sensitivity. The results show that as long as simulations are run on a small domain, differences in climate sensitivity among the different models are still relatively small, while climate sensitivities vary tremendously for the large domain simulations. The climate sensitivity parameter ranges from very low to high or even negative values, the latter indicating an unstable climate state. The variability of climate sensitivity is larger on the large domain than on the small domain because convective self-aggregation is suppressed on the small domain, while self-aggregation is free to change with temperature on the large domain, thereby affecting climate sensitivity: if self-aggregation increases with temperature, then climate sensitivity is small, and if self-aggregation decreases with temperature, then climate sensitivity is high or even negative. We can attribute this effect to a drying and expansion of the subsiding regions in response to convective self-aggregation, causing an increase in outgoing longwave radiation. In addition, changes in low clouds play a critical role. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Becker.pdf Type: application/pdf Size: 185488 bytes Desc: MET_Seminar_Flyer_Becker.pdf URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Silvers.pdf Type: application/pdf Size: 266197 bytes Desc: MET_Seminar_Flyer_Silvers.pdf URL: From eoas-seminar at lists.fsu.edu Tue Jan 21 16:44:11 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 21 Jan 2020 21:44:11 +0000 Subject: [Eoas-seminar] Tuesday Jan 28 Faculty Candidate for Solid Earth Processes in the Lithosphere (Chenguang Sun) Message-ID: Dear all, The first faculty candidate for the Lithospheric Processes (Metamorphic Petrology) search, Dr. Chenguang Sun will be arriving next Monday (27th) afternoon and will be leaving on Wednesday (29th). I am attaching the title and abstract of his talk. The talk is scheduled at 3:30 PM; 28th January 2020 (Tuesday) Venue: EOA 1044. I am also attaching his CV+ application materials for your reference. If you would like additional information please feel free to contact me, I will be happy to update. Also if you would like to meet the candidate, please let me know of your availability and I will try and schedule a meeting. I hope you are able to attend the presentation. Title: Cratonic lithosphere thinning through time: Evidence from kimberlite thermobarometry Abstract: As the keels of continents, cratons are believed to have been stable since their formation at billions of years ago. This conventional view was established from petrological, geochemical, and geophysical studies on cratonic lithosphere. Yet, evidence for the absence of cratonic roots at some Archean terrains casts doubt on the craton stability. This poses a fundamental question on the destabilization of cratons globally through time, which was often overlooked due to the lack of geological observations. To address this question, I develop a new liquid thermobarometer for kimberlite and other silica-poor, CO2-rich melts using high-temperature and high-pressure experimental data. As unique mantle-derived melts at ancient continents, kimberlite magmas are ideal tools to constrain the temporal variation of lithosphere thickness and the processes affecting the lithosphere root. Applying this new thermobarometer to global kimberlite rock records, I will show that the thickness of cratonic lithosphere has decreased globally by up to ~150 km during the past ~2 Gyr, indicating that the conventional view of stable, long-lived cratons needs to be revised. This has significant consequences on Earth?s dynamic and chemical evolution that demand a series of future studies. Taking the temporal evolution of kimberlite volcanism and subduction flux into account, I will also discuss the possible mechanism of craton destabilization through time and its implications for Earth?s deep carbon cycle. Best wishes Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Chenguang_Sun_Application_Report.pdf Type: application/pdf Size: 668625 bytes Desc: Chenguang_Sun_Application_Report.pdf URL: From eoas-seminar at lists.fsu.edu Wed Jan 22 21:52:52 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 23 Jan 2020 02:52:52 +0000 Subject: [Eoas-seminar] Tuesday Feb 4th Faculty Candidate for Solid Earth Processes in the Lithosphere (Hector Manadrid) Message-ID: Dear all, Dr. Hector Lamadrid will be visiting us from Feb. 3rd-5th as part of the faculty search for Solid Earth Processes in the Lithosphere (Metamorphic Petrology). I am attaching the title and abstract of his talk. The talk is scheduled at 3:30 PM on 4th February 2020 (Tuesday) at EOA 1044. I am also attaching his CV+ application materials for your reference. If you would like additional information, please feel free to contact me. Also, if you would like to meet the candidate, please let me know of your availability. I will try to schedule a meeting. I hope you are able to attend the talk. Title: Serpentinization and other hydrothermal reactions in crustal environments: Experimental and analytical developments in the study of fluid-rock interactions. Abstract: The hydrothermal alteration of mantle rocks, commonly known as serpentinization, is a major geological process that has a strong influence on the exchange of mass and energy between the deep Earth and the surface of the planet, affects the rheology and seismic structure of the oceanic lithosphere, and during subduction affects the formation of arc magmatism. Serpentinization encompasses a series of disequilibrium and equilibrium reactions (hydration, dehydration, carbonation, oxidation, etc.) that produces serpentine phases (mainly lizardite and/or chrysotile) ? brucite ? talc ? magnetite ? carbonates ? volatiles like H2 and CH4. The potential of H2 and CH4 to sustain chemoautotrophic microorganisms on early Earth, and the seemingly straight forward correlation to the serpentinization reaction has fueled the interest from the scientific community concerning how the overall process of hydrothermal alteration of ultramafic minerals is linked to the origin of life and the habitability of other planetary bodies (e.g. Mars and the icy moons of Jupiter and Saturn). These far-reaching implications underscore the importance of the quantitative understanding of the influence of physical and chemical conditions on the rates of the serpentinization reaction, and the identification of the geological environments most favorable for serpentinization. Here we show results of a series of ongoing projects studying the kinetics of the hydration, carbonation (CO2 sequestration) and dehydration reactions, aimed to better understand the individual effects that the geological environments (temperature, pressure, fluid chemistry, rock composition, etc.) impose in the overall serpentinization processes, and the future directions of this research. Our results confirm that the fluid composition is one of the most important controlling factors in the serpentinization rates and can set constraints on the mass and energy transfer between different reservoirs. The fluid composition of the hydrothermal system can have important implications on how we model the serpentinization process, especially considering how little we know about the fluid chemistry in several geologic environments where serpentinization and other fluid-rock interactions occur (e.g. subduction zones and the ocean chemistry of other planetary bodies). Moreover, we will show recent successes in the development of new experimental and analytical methodologies that allow us to constrain and control some of the rapidly changing physical and chemical conditions that occur in fluid-rock interactions. Best wishes Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Hector_Lamadrid_Application_Report.pdf Type: application/pdf Size: 679728 bytes Desc: Hector_Lamadrid_Application_Report.pdf URL: From eoas-seminar at lists.fsu.edu Thu Jan 23 10:36:57 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 23 Jan 2020 15:36:57 +0000 Subject: [Eoas-seminar] Reminder: MET Seminar Today! Message-ID: Dear all, Just a reminder that we have our first Meteorology seminar of the semester TODAY at 3:30 PM in Room 353 in the Love Building. Dr. Levi Silvers from Stony Brook University will be presenting about ?A mock-Walker circulation and Radiative Convective Equilibrium: Clouds and Precipitation?. We look forward to seeing you there!! Cheers, Allison Abstract: The overturning tropical Pacific circulation known as the Walker circulation embodies complex interactions between large-scale circulations, deep and shallow convection, stratocumulus clouds, and microphysical cloud processes. The large-scale nature of the Walker circulation has made high-resolution modeling costly, while understanding the feedbacks between parameterized clouds and the large-scale circulation have remained challenging in the context of global models. This study uses an idealized Walker circulation to explore how multiple tropical cloud types interact with a large-scale circulation. A high-resolution model with explicit convection (1km and 2km grid-spacing) is used to examine the system free of the complications inherent in convective parameterizations. The same model is also used at GCM-like resolutions with parameterized convection (25km and 100km grid-spacing) to gain insight into how the clouds and circulations interact in a configuration similar to a GCM. The interaction between clouds and the longwave radiation increases, or decreases, precipitation depending on whether high or low clouds are dominant. Interactions between the longwave radiation and parameterized convection result in the precipitation maximum being shifted off of the SST maximum. Cloud resolving simulations result in stronger overturning, more condensate aloft, and a relative humidity that is 40% higher in the deep convective regions than it is for GCM-like simulations. This configuration can also be used as a bridge between experiments of radiative convective equilibrium and those with more complex boundary conditions. We argue that a mock-Walker Circulation is an ideal framework with which to build on the insight we have gained from RCE experiments and we are optimistic that it can help us to solve some of the more persistent questions about how clouds and the large-scale circulation interact. ?????????????????? Allison Wing, Ph.D. Assistant Professor 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: MET_Seminar_Flyer_Silvers.pdf Type: application/pdf Size: 266197 bytes Desc: MET_Seminar_Flyer_Silvers.pdf URL: From eoas-seminar at lists.fsu.edu Thu Jan 23 22:54:52 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 24 Jan 2020 03:54:52 +0000 Subject: [Eoas-seminar] DATE CHANGE: MET Seminar *Monday* Jan 27 @3:45 PM Message-ID: Dear all, The Meteorology seminar given by Dr. Tobias Becker (Max Planck Institute for Meteorology) originally scheduled for Tuesday January 28 has been changed to Monday January 27 at 3:45 PM in 1044 EOA. Despite this last minute change and the odd day and time, we hope that you can still all attend to hear Dr. Becker present some exciting new results about the processes that control climate sensitivity, including the role of organization of convection. There are a couple of spots remaining to meet with Dr. Becker; contact Allison Wing (awing at fsu.edu) if you would like to schedule a meeting. Cheers, Allison Meteorology Seminar by Dr. Tobias Becker (Monday January 27, 3:45 PM in 1044 EOA) Title: Climate sensitivity across the RCEMIP simulations Abstract: Simulations of radiative-convective equilibrium (RCE) have greatly influenced the understanding of climate, and climate change. Early simulations were performed with very simple one-dimensional models of the atmosphere, followed by cloud-resolving simulations. In the last five years it has also become common practice to simulate RCE with comprehensive general circulation models. These recent studies have revealed that different RCE states can be found, depending on how convection aggregates, even in the absence of external asymmetries in the forcing, and have motivated the RCEMIP project, which defines a standardized experimental protocol, to study RCE across a range of models. For each RCEMIP model, simulations at fixed sea-surface temperatures of 295 K, 300 K and 305 K have been performed, both on a small and on a large domain. Here our focus is on investigating how climate sensitivity differs across those simulations, with the aim to understand what processes control climate sensitivity. The results show that as long as simulations are run on a small domain, differences in climate sensitivity among the different models are still relatively small, while climate sensitivities vary tremendously for the large domain simulations. The climate sensitivity parameter ranges from very low to high or even negative values, the latter indicating an unstable climate state. The variability of climate sensitivity is larger on the large domain than on the small domain because convective self-aggregation is suppressed on the small domain, while self-aggregation is free to change with temperature on the large domain, thereby affecting climate sensitivity: if self-aggregation increases with temperature, then climate sensitivity is small, and if self-aggregation decreases with temperature, then climate sensitivity is high or even negative. We can attribute this effect to a drying and expansion of the subsiding regions in response to convective self-aggregation, causing an increase in outgoing longwave radiation. In addition, changes in low clouds play a critical role. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Becker.pdf Type: application/pdf Size: 12106577 bytes Desc: MET_Seminar_Flyer_Becker.pdf URL: From eoas-seminar at lists.fsu.edu Fri Jan 24 09:04:07 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 24 Jan 2020 14:04:07 +0000 Subject: [Eoas-seminar] REMINDER TODAY: Fwd: EOAS colloquium in the afternoon of Friday, Jan. 24 (@ 3:30 PM. EOA 1044) In-Reply-To: References: Message-ID: -------- Forwarded Message -------- Subject: [Eoas-seminar] EOAS colloquium in the afternoon of Friday, Jan. 24 (@ 3:30 PM. EOA 1044) Date: Fri, 17 Jan 2020 17:12:13 +0000 From: eoas-seminar--- via Eoas-seminar Reply-To: eoas-seminar at lists.fsu.edu To: eoas-seminar at lists.fsu.edu , info at coaps.fsu.edu Hi All, In the coming Friday (Jan. 24, @ 3:30 PM. EOA 1044), the EOAS colloquium will have Prof. Kevin Reed of the Stony Brook University as the speaker (3:30 PM, LOV 353). The title and abstract of his talk are (also see the attached seminar announcement flyer). Title: Exploring Climate Change Impacts on Tropical Cyclones Abstract: The next century will see unprecedented changes to the climate system with direct consequences for society. As stated in the National Climate Assessment, ?changes in extreme weather events are the primary way that most people experience climate change.? In this sense, the characteristics of extreme weather are key indicators of climate change impacts, at both local and regional scales. Understanding potential changes in the location, intensity and structure of such extremes (e.g., tropical cyclones, severe thunderstorms and flooding) is crucial in planning for future adaptation as these events have large economic and social costs. The goal of this work is to better understand climate impacts on tropical cyclones in various high-resolution configurations of the Community Atmosphere Model (CAM) run at horizontal grid spacings of approximately 28 km and forced with prescribed sea-surface temperatures and greenhouse gas concentrations for past, present, and future climates. This analysis will include the evaluation of conventional (AMIP-style) decadal simulations typical of climate models, short 7-day ensemble hindcasts of recent devastating events, and reduced complexity simulations of idealized states of the climate system. Through this hierarchical modeling approach the impact of climate change on the characteristics (frequency, intensity, rainfall, etc.) of extreme weather, including tropical cyclones, can be quantified. Look forward to meeting you there. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Jan 24 16:46:31 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 24 Jan 2020 21:46:31 +0000 Subject: [Eoas-seminar] No EOAS COlloquium Jan 31 Message-ID: There will be no EOAS colloquium next Fri,? Jan 31 as there is an EOAS faculty meeting. From eoas-seminar at lists.fsu.edu Mon Jan 27 07:46:36 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 27 Jan 2020 12:46:36 +0000 Subject: [Eoas-seminar] Tuesday Jan 28th Message-ID: Dear all, Dr. Chenguang Sun is visiting us Jan 27-29th as part of the faculty search for Solid Earth Processes in the Lithosphere (Metamorphic Petrology). I am attaching the title and abstract of his talk. The talk is scheduled at 3:30 PM on 28th February 2020 (Tuesday) at EOA 1044. I hope you are able to attend the talk. Title: Cratonic lithosphere thinning through time: Evidence from kimberlite thermobarometry Abstract: As the keels of continents, cratons are believed to have been stable since their formation at billions of years ago. This conventional view was established from petrological, geochemical, and geophysical studies on cratonic lithosphere. Yet, evidence for the absence of cratonic roots at some Archean terrains casts doubt on the craton stability. This poses a fundamental question on the destabilization of cratons globally through time, which was often overlooked due to the lack of geological observations. To address this question, I develop a new liquid thermobarometer for kimberlite and other silica-poor, CO2-rich melts using high-temperature and high-pressure experimental data. As unique mantle-derived melts at ancient continents, kimberlite magmas are ideal tools to constrain the temporal variation of lithosphere thickness and the processes affecting the lithosphere root. Applying this new thermobarometer to global kimberlite rock records, I will show that the thickness of cratonic lithosphere has decreased globally by up to ~150 km during the past ~2 Gyr, indicating that the conventional view of stable, long-lived cratons needs to be revised. This has significant consequences on Earth?s dynamic and chemical evolution that demand a series of future studies. Taking the temporal evolution of kimberlite volcanism and subduction flux into account, I will also discuss the possible mechanism of craton destabilization through time and its implications for Earth?s deep carbon cycle. Thank you Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Jan 27 08:51:17 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 27 Jan 2020 13:51:17 +0000 Subject: [Eoas-seminar] MET Seminar *Monday* Jan 27 @3:45 PM in 1044 EOA In-Reply-To: References: Message-ID: Hi all, This is a reminder that there will be a Meteorology seminar given by Dr. Tobias Becker (Max Planck Institute for Meteorology) this afternoon at 3:45 PM in 1044 EOA. Dr. Becker will present some exciting new results about the processes that control climate sensitivity, including the role of organization of convection (see the attached flyer). Cheers, Zhaohua Wu -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Becker.pdf Type: application/pdf Size: 12106577 bytes Desc: MET_Seminar_Flyer_Becker.pdf URL: From eoas-seminar at lists.fsu.edu Mon Jan 27 09:21:30 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 27 Jan 2020 14:21:30 +0000 Subject: [Eoas-seminar] Tuesday Jan 28th In-Reply-To: References: Message-ID: Dear All, Many apologies for a repeat email the talk is scheduled at 3:30 PM on 28th January 2020 (Tuesday) i.e., tomorrow at EOA 1044. In my earlier email the date was incorrect, I apologize. Best Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- On Jan 27, 2020, at 7:46 AM, eoas-seminar--- via Eoas-seminar > wrote: Dear all, Dr. Chenguang Sun is visiting us Jan 27-29th as part of the faculty search for Solid Earth Processes in the Lithosphere (Metamorphic Petrology). I am attaching the title and abstract of his talk. The talk is scheduled at 3:30 PM on 28th February 2020 (Tuesday) at EOA 1044. I hope you are able to attend the talk. Title: Cratonic lithosphere thinning through time: Evidence from kimberlite thermobarometry Abstract: As the keels of continents, cratons are believed to have been stable since their formation at billions of years ago. This conventional view was established from petrological, geochemical, and geophysical studies on cratonic lithosphere. Yet, evidence for the absence of cratonic roots at some Archean terrains casts doubt on the craton stability. This poses a fundamental question on the destabilization of cratons globally through time, which was often overlooked due to the lack of geological observations. To address this question, I develop a new liquid thermobarometer for kimberlite and other silica-poor, CO2-rich melts using high-temperature and high-pressure experimental data. As unique mantle-derived melts at ancient continents, kimberlite magmas are ideal tools to constrain the temporal variation of lithosphere thickness and the processes affecting the lithosphere root. Applying this new thermobarometer to global kimberlite rock records, I will show that the thickness of cratonic lithosphere has decreased globally by up to ~150 km during the past ~2 Gyr, indicating that the conventional view of stable, long-lived cratons needs to be revised. This has significant consequences on Earth?s dynamic and chemical evolution that demand a series of future studies. Taking the temporal evolution of kimberlite volcanism and subduction flux into account, I will also discuss the possible mechanism of craton destabilization through time and its implications for Earth?s deep carbon cycle. Thank you Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- _______________________________________________ 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 Jan 31 16:01:56 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 31 Jan 2020 21:01:56 +0000 Subject: [Eoas-seminar] Tuesday Feb 4th Faculty Candidate for Solid Earth Processes in the Lithosphere (Hector Manadrid) Message-ID: Dear all, Dr. Hector Lamadrid will be visiting us from Feb. 3rd-5th as part of the faculty search for Solid Earth Processes in the Lithosphere (Metamorphic Petrology). I am attaching the title and abstract of his talk. The talk is scheduled at 3:30 PM on 4th February 2020 (Tuesday) at EOA 1044. I hope you are able to attend the talk. Title: Serpentinization and other hydrothermal reactions in crustal environments: Experimental and analytical developments in the study of fluid-rock interactions. Abstract: The hydrothermal alteration of mantle rocks, commonly known as serpentinization, is a major geological process that has a strong influence on the exchange of mass and energy between the deep Earth and the surface of the planet, affects the rheology and seismic structure of the oceanic lithosphere, and during subduction affects the formation of arc magmatism. Serpentinization encompasses a series of disequilibrium and equilibrium reactions (hydration, dehydration, carbonation, oxidation, etc.) that produces serpentine phases (mainly lizardite and/or chrysotile) ? brucite ? talc ? magnetite ? carbonates ? volatiles like H2 and CH4. The potential of H2 and CH4 to sustain chemoautotrophic microorganisms on early Earth, and the seemingly straight forward correlation to the serpentinization reaction has fueled the interest from the scientific community concerning how the overall process of hydrothermal alteration of ultramafic minerals is linked to the origin of life and the habitability of other planetary bodies (e.g. Mars and the icy moons of Jupiter and Saturn). These far-reaching implications underscore the importance of the quantitative understanding of the influence of physical and chemical conditions on the rates of the serpentinization reaction, and the identification of the geological environments most favorable for serpentinization. Here we show results of a series of ongoing projects studying the kinetics of the hydration, carbonation (CO2 sequestration) and dehydration reactions, aimed to better understand the individual effects that the geological environments (temperature, pressure, fluid chemistry, rock composition, etc.) impose in the overall serpentinization processes, and the future directions of this research. Our results confirm that the fluid composition is one of the most important controlling factors in the serpentinization rates and can set constraints on the mass and energy transfer between different reservoirs. The fluid composition of the hydrothermal system can have important implications on how we model the serpentinization process, especially considering how little we know about the fluid chemistry in several geologic environments where serpentinization and other fluid-rock interactions occur (e.g. subduction zones and the ocean chemistry of other planetary bodies). Moreover, we will show recent successes in the development of new experimental and analytical methodologies that allow us to constrain and control some of the rapidly changing physical and chemical conditions that occur in fluid-rock interactions. Best wishes Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Jan 31 16:53:39 2020 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 31 Jan 2020 16:53:39 -0500 Subject: [Eoas-seminar] No EOAS colloquium Fri Feb 7 In-Reply-To: References: Message-ID: Because there is a candidate seminar on Tues, there will be no EOAS colloquium talk on Fri Feb 7.? Please join us instead for the candidate seminar on Tues., announcement below: -------- Forwarded Message -------- Subject: [Eoas-seminar] Tuesday Feb 4th Faculty Candidate for Solid Earth Processes in the Lithosphere (Hector Manadrid) Date: Fri, 31 Jan 2020 21:01:56 +0000 From: eoas-seminar--- via Eoas-seminar Reply-To: eoas-seminar at lists.fsu.edu To: eoas-seminar at lists.fsu.edu Dear all, Dr. Hector Lamadrid will be visiting us from Feb. 3rd-5th as part of the?faculty search for?Solid Earth Processes in the Lithosphere (Metamorphic Petrology). I am attaching the title and abstract of his talk. The talk is scheduled at *3:30 PM on 4th February 2020*?(Tuesday) at*EOA 1044*. I hope you are able to attend the talk. *Title:***Serpentinization and other hydrothermal reactions in crustal environments: Experimental and analytical developments in the study of fluid-rock interactions. *Abstract:*?The hydrothermal alteration of mantle rocks, commonly known as serpentinization, is a major geological process that has a strong influence on the exchange of mass and energy between the deep Earth and the surface of the planet, affects the rheology and seismic structure of the oceanic lithosphere, and during subduction affects the formation of arc magmatism. Serpentinization encompasses a series of disequilibrium and equilibrium reactions (hydration, dehydration, carbonation, oxidation, etc.) that produces serpentine phases (mainly lizardite and/or chrysotile) ? brucite ? talc ? magnetite ? carbonates ? volatiles like H_2 ?and CH_4 . The potential of H_2 ?and CH_4 to sustain chemoautotrophic microorganisms on early Earth, and the seemingly straight forward correlation to the serpentinization reaction has fueled the interest from the scientific community concerning how the overall process of hydrothermal alteration of ultramafic minerals is linked to the origin of life and the habitability of other planetary bodies (e.g. Mars and the icy moons of Jupiter and Saturn). These far-reaching implications underscore the importance of the quantitative understanding of the influence of physical and chemical conditions on the rates of the serpentinization reaction, and the identification of the geological environments most favorable for serpentinization. Here we show results of a series of ongoing projects studying the kinetics of the hydration, carbonation (CO_2 ?sequestration) and dehydration reactions, aimed to better understand the individual effects that the geological environments (temperature, pressure, fluid chemistry, rock composition, etc.) impose in the overall serpentinization processes, and the future directions of this research. Our results confirm that the fluid composition is one of the most important controlling factors in the serpentinization rates and can set constraints on the mass and energy transfer between different reservoirs. The fluid composition of the hydrothermal system can have important implications on how we model the serpentinization process, especially considering how little we know about the fluid chemistry in several geologic environments where serpentinization and other fluid-rock interactions occur (e.g. subduction zones and the ocean chemistry of other planetary bodies). Moreover, we will show recent successes in the development of new experimental and analytical methodologies that allow us to constrain and control some of the rapidly changing physical and chemical conditions that occur in fluid-rock interactions. Best wishes Mainak ----------------------------------------------------------------- Mainak Mookherjee Associate Professor Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee, FL, 32310, USA Phone: (850) 644 1536 (Office) Email: mmookherjee at fsu.edu Email: mainak.mookherjee at gmail.com URL:http://myweb.fsu.edu/mmookherjee ----------------------------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: