From eoas-seminar at lists.fsu.edu Mon Feb 1 09:55:20 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 1 Feb 2021 14:55:20 +0000 Subject: [Eoas-seminar] Geology dissertation defense - Shakura Jahan - Feb 15, 1:00p - zoom Message-ID: Geology dissertation defense - Shakura Jahan - Feb 15, 1:00 Title: RECONSTRUCTION OF PALEOSTORM HISTORY USING GEOCHEMICAL PROXIES IN COASTAL LAKE SEDIMENTS FROM THE NORTH AND NORTHEASTERN GULF OF FLORIDA Major Professor: Yang Wang Join Zoom Meeting https://us04web.zoom.us/j/73858643253?pwd=RW5qNHFORkEwdzVYWWpUOHBwSVV1dz09 Meeting ID: 738 5864 3253 Passcode: CK1vJ8 Abstract Organic geochemical proxies (OGPs: ?13C, ?15N and C/N) preserved in coastal lake sediments appear to be more sensitive indicators of past storm events. However, the method has not been tested in many lakes and with modern data. In this research, we measured the ?13C, ?15N and C/N values of particulate organic matter (POM), along with salinities and stable isotopic compositions of water (?18O and ?2H) from two coastal lakes in north and northwest Florida on seasonal or much shorter time scales throughout a 3-year period (from May 2016 to October 2019). The time-series geochemical data not only show that geochemical properties of these lakes varied seasonally, reflecting variations in lake biological and environmental conditions, but also displayed unique variation patterns in response to large storms that caused either seawater (SW) flooding or freshwater (FW) flooding of the lakes. Our data show that SW flooding led to higher ?13C and ?15N values, with either lower or no change in the C/N ratios of the POM, generally consistent with a previously proposed conceptual model for detecting SW flooding events. The data also show that FW flooding reduces ?15N and increases the C/N values of POM, and lowers the salinity, ?18O and ?2H of lake water. These modern time-series data demonstrate the feasibility of detecting past storm events that were large enough to cause either SW or FW flooding from analysis of OGPs preserved in coastal lake sediments. Applying this understanding, we have reconstructed a centuries-long record of large storms based on the variation patterns of OGPs in a sediment core, together with 210Pb ages, from a coastal lake in North Florida. The OGP-based storm record suggests 30 flooding events over the last 166 years, which can be matched (within the dating uncertainty) with almost all of the historic hurricanes that are known to have passed within 150 km of the study site. This further confirms that OGPs preserved in coastal lake sediments may be used as reliable recorders of past storm activity. Using the OGP method, we reconstructed a high-resolution proxy record of storm history from a coastal lake (Mullet Pond) in North Florida, over the last 4500 year. The OGP record reveals three active periods with storm frequencies near this site ? 11 storms/century based on both SW and FW flooding events, and two particularly quiet periods with <1 or no storm event detected. The OGP-based reconstruction of storm activities suggests that storm activity peaked between 1120 Cal yr BP and 1380 Cal yr BP with storm frequencies ? 21 storms/century, and the peak of this active period is offset by ~300 years (due to radiocarbon age uncertainty) from the Medieval Warm Period (MWP: ~900-1300 A.D.). The active storm interval from ~990-820 Cal yr BP (960-1130 A.D.) coincides with MWP. The other active period between 1380 and 1120 Cal yr BP is offset by 300 years (due to radiocarbon age uncertainty) from the MWP, but shows peak storm activity in the OGP record and exceeds the storm frequency in the post-1850 era, consistent with the statistical model predictions of past tropical cyclone activity based on instrumental and other proxy-reconstructed climate indices. This support the concept that long-term hurricane activity may be largely driven by variations in large-scale climate and oceanographic conditions. We have also applied the OGP approach to a similar coastal lake the Cedar Key area in the northeastern Gulf Coast of Florida and developed a high-resolution proxy record of storm history over the last 2300 years. The OGP record reveals five active periods based on both SW and FW flooding events, with storm frequencies near this site is greater than the mean storm frequency (2.8 storms/century), and three quiet periods with <1 storm/century have been detected. The OGP-based storm reconstruction suggests that storm activity peaked between -60 Cal yr BP (1890 C.E.) and 75 Cal yr BP, which is consistent with storm reconstruction from southwestern Florida and Caribbean sites, with relatively warm sea surface temperatures (SSTs) in the GOM. The two other active storm intervals (between 290-480 Cal yr BP and 520-640 Cal yr BP, the later one roughly corresponds to MWP) at Cedar Key site between 1310 and 1660 C.E. show frequent hurricane activities, likely due to warm SSTs, that are also consistent with other proxy records from GOM sites, the North American east coast, and the Bahamas. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Feb 3 09:09:45 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 3 Feb 2021 14:09:45 +0000 Subject: [Eoas-seminar] Geology Thesis Defense - Jennifer Fought - Feb 17, 2:00p - zoom Message-ID: Geology Thesis Defense - Jennifer Fought - Feb 17, 2:00p Title: GEOLOGY OF THE EASTERN BLUE RIDGE IN THE NAPOLEON 7.5' QUADRANGLE IN EAST CENTRAL ALABAMA AND WEST CENTRAL GEORGIA Major Professor: Jim Tull Join Zoom Meeting https://urldefense.com/v3/__https://fsu.zoom.us/j/93715242183__;!!PhOWcWs!h6vsvoz_WPMv6AR1uanpm1OIV9JluwDgo7nwh5_-XTT5K_VSjxNtQ2WuUIAr0E8$ Meeting ID: 937 1524 2183 One tap mobile +13017158592,,93715242183# US (Washington DC) 13126266799,,93715242183# +US (Chicago) Dial by your location +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) Meeting ID: 937 1524 2183 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Mon Feb 8 09:12:09 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 8 Feb 2021 14:12:09 +0000 Subject: [Eoas-seminar] MET Seminar at 3:30 PM, Thursday, Feb. 11, 2021 Message-ID: Hi all, Here is an announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 11, 2021. The related information can be found in the following and the attached flyer. Speaker: Mr. Yi-Chuan Zhuang, University of California, Berkeley Title: Extending the Heat Index to Quantify the Physiological Response to Future Warming Abstract: The Heat Index is a widely used measure of apparent temperature that accounts for the effects of humidity using Steadman?s model of human thermoregulation. Steadman?s model, however, gives unphysical results in sufficiently hot and humid conditions, leading to an undefined Heat Index. In a business-as-usual climate scenario, an undefined Heat Index will become increasingly frequent, eventually occurring across a third of the planet at any given moment. Hence, we extend the Heat Index to all conditions, and map the index onto measurable quantities, including the elevated core temperature in severe conditions and, in fatal conditions, the time it takes for the core to exceed a survivable temperature. The Heat Index is then calculated everywhere on Earth in a business-as-usual climate simulation up to the year 2300, allowing us to assess the habitability of future Earth. Time: 3:30 PM, Thursday, Feb. 11, 2021 Zoom Link: https://fsu.zoom.us/j/92027554191?pwd=dkw2UDRkOE9zQkRhTzR6R05qSUk0Zz09 It is noted that the pre-seminar session, "Meeting with the Speaker," will start at 3:00 PM with the same zoom link. Look forward to seeing you then. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Lu.pdf Type: application/pdf Size: 1016687 bytes Desc: MET_Seminar_Flyer_Lu.pdf URL: From eoas-seminar at lists.fsu.edu Wed Feb 10 23:49:02 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 11 Feb 2021 04:49:02 +0000 Subject: [Eoas-seminar] Thursday MET Seminar Reminder Message-ID: Hi all, Here is a friendly reminder that we have a MET seminar at 3:30 PM on Thursday, Feb. 11, 2021. The related information can be found in the following and the attached flyer. Speaker: Mr. Yi-Chuan Lu, University of California, Berkeley Title: Extending the Heat Index to Quantify the Physiological Response to Future Warming Abstract: The Heat Index is a widely used measure of apparent temperature that accounts for the effects of humidity using Steadman?s model of human thermoregulation. Steadman?s model, however, gives unphysical results in sufficiently hot and humid conditions, leading to an undefined Heat Index. In a business-as-usual climate scenario, an undefined Heat Index will become increasingly frequent, eventually occurring across a third of the planet at any given moment. Hence, we extend the Heat Index to all conditions, and map the index onto measurable quantities, including the elevated core temperature in severe conditions and, in fatal conditions, the time it takes for the core to exceed a survivable temperature. The Heat Index is then calculated everywhere on Earth in a business-as-usual climate simulation up to the year 2300, allowing us to assess the habitability of future Earth. Time: 3:30 PM, Thursday, Feb. 11, 2021 Zoom Link: https://fsu.zoom.us/j/92027554191?pwd=dkw2UDRkOE9zQkRhTzR6R05qSUk0Zz09 It is noted that the pre-seminar session, "Meeting with the Speaker," will start at 3:00 PM with the same zoom link. Look forward to seeing you then. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Lu.pdf Type: application/pdf Size: 1016687 bytes Desc: MET_Seminar_Flyer_Lu.pdf URL: From eoas-seminar at lists.fsu.edu Fri Feb 12 13:56:18 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 12 Feb 2021 18:56:18 +0000 Subject: [Eoas-seminar] Reminder: Geology dissertation defense - Shakura Jahan - Feb 15, 1:00p - zoom Message-ID: Geology dissertation defense - Shakura Jahan - Feb 15, 1:00 Title: RECONSTRUCTION OF PALEOSTORM HISTORY USING GEOCHEMICAL PROXIES IN COASTAL LAKE SEDIMENTS FROM THE NORTH AND NORTHEASTERN GULF OF FLORIDA Major Professor: Yang Wang Join Zoom Meeting https://us04web.zoom.us/j/73858643253?pwd=RW5qNHFORkEwdzVYWWpUOHBwSVV1dz09 Meeting ID: 738 5864 3253 Passcode: CK1vJ8 Abstract Organic geochemical proxies (OGPs: ?13C, ?15N and C/N) preserved in coastal lake sediments appear to be more sensitive indicators of past storm events. However, the method has not been tested in many lakes and with modern data. In this research, we measured the ?13C, ?15N and C/N values of particulate organic matter (POM), along with salinities and stable isotopic compositions of water (?18O and ?2H) from two coastal lakes in north and northwest Florida on seasonal or much shorter time scales throughout a 3-year period (from May 2016 to October 2019). The time-series geochemical data not only show that geochemical properties of these lakes varied seasonally, reflecting variations in lake biological and environmental conditions, but also displayed unique variation patterns in response to large storms that caused either seawater (SW) flooding or freshwater (FW) flooding of the lakes. Our data show that SW flooding led to higher ?13C and ?15N values, with either lower or no change in the C/N ratios of the POM, generally consistent with a previously proposed conceptual model for detecting SW flooding events. The data also show that FW flooding reduces ?15N and increases the C/N values of POM, and lowers the salinity, ?18O and ?2H of lake water. These modern time-series data demonstrate the feasibility of detecting past storm events that were large enough to cause either SW or FW flooding from analysis of OGPs preserved in coastal lake sediments. Applying this understanding, we have reconstructed a centuries-long record of large storms based on the variation patterns of OGPs in a sediment core, together with 210Pb ages, from a coastal lake in North Florida. The OGP-based storm record suggests 30 flooding events over the last 166 years, which can be matched (within the dating uncertainty) with almost all of the historic hurricanes that are known to have passed within 150 km of the study site. This further confirms that OGPs preserved in coastal lake sediments may be used as reliable recorders of past storm activity. Using the OGP method, we reconstructed a high-resolution proxy record of storm history from a coastal lake (Mullet Pond) in North Florida, over the last 4500 year. The OGP record reveals three active periods with storm frequencies near this site ? 11 storms/century based on both SW and FW flooding events, and two particularly quiet periods with <1 or no storm event detected. The OGP-based reconstruction of storm activities suggests that storm activity peaked between 1120 Cal yr BP and 1380 Cal yr BP with storm frequencies ? 21 storms/century, and the peak of this active period is offset by ~300 years (due to radiocarbon age uncertainty) from the Medieval Warm Period (MWP: ~900-1300 A.D.). The active storm interval from ~990-820 Cal yr BP (960-1130 A.D.) coincides with MWP. The other active period between 1380 and 1120 Cal yr BP is offset by 300 years (due to radiocarbon age uncertainty) from the MWP, but shows peak storm activity in the OGP record and exceeds the storm frequency in the post-1850 era, consistent with the statistical model predictions of past tropical cyclone activity based on instrumental and other proxy-reconstructed climate indices. This support the concept that long-term hurricane activity may be largely driven by variations in large-scale climate and oceanographic conditions. We have also applied the OGP approach to a similar coastal lake the Cedar Key area in the northeastern Gulf Coast of Florida and developed a high-resolution proxy record of storm history over the last 2300 years. The OGP record reveals five active periods based on both SW and FW flooding events, with storm frequencies near this site is greater than the mean storm frequency (2.8 storms/century), and three quiet periods with <1 storm/century have been detected. The OGP-based storm reconstruction suggests that storm activity peaked between -60 Cal yr BP (1890 C.E.) and 75 Cal yr BP, which is consistent with storm reconstruction from southwestern Florida and Caribbean sites, with relatively warm sea surface temperatures (SSTs) in the GOM. The two other active storm intervals (between 290-480 Cal yr BP and 520-640 Cal yr BP, the later one roughly corresponds to MWP) at Cedar Key site between 1310 and 1660 C.E. show frequent hurricane activities, likely due to warm SSTs, that are also consistent with other proxy records from GOM sites, the North American east coast, and the Bahamas. -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Feb 12 15:21:38 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 12 Feb 2021 20:21:38 +0000 Subject: [Eoas-seminar] Seminar Tuesday Feb 16th In-Reply-To: References: Message-ID: Dear all, Chris Thom will be visiting us next week, i.e., Feb 16th-17th. He is a candidate for the faculty search in "Geophysics?. Please let me know if you would like to meet the candidate. I am also attaching the title and abstract of his talk. The talk is scheduled at 3:30 PM on 16th February 2021 (Tuesday), https://fsu.zoom.us/j/93159238156 Title: The steady-state and transient strength of rocks: Recent advances and future directions Abstract: The brittle and viscous rheology (flow) of Earth?s lithosphere (the outer ~100 km of rock) exerts a first order control on numerous geological phenomena such as the nucleation of earthquakes, post-seismic creep, post-glacial isostatic readjustment, and large-scale bending of tectonic plates at subduction zones. Because these processes occur over timescales of decades to millions of years, it is not straightforward to infer the strength of deforming rocks solely from geophysical observations. Numerical modeling is another commonly used and complementary approach, but quantitative constitutive laws are required as inputs. Thus, experimental rock mechanics has become a critical link to understanding geophysical and geodynamical phenomena by developing steady-state ?flow laws? to describe the strength of rocks as a function of variables such as temperature, pressure, deformation rate, and grain size. However, many open questions remain on the details of the micromechanics of deformation at steady-state, and no physics-based transient ?flow laws? exist to describe the emerging richness and variability of deformation around major fault zones (e.g., slow slip earthquakes and time-dependent viscosity). In this talk, I will present some of my major contributions to rock deformation over the past few years, which utilize non-conventional experimental rock deformation techniques such as nanoindentation and uniaxial stress-reduction tests. These unique methods allow me to achieve deformation conditions that are unattainable in more conventional apparatus. My work thus far has culminated in a new microphysics-based model that can capture both the steady-state and transient deformation of rocks at high temperature in the laboratory. The microphysical mechanisms that give rise to the complex behavior also occur at deformation conditions over the entire thickness of Earth?s lithosphere, suggesting that many different geophysical and geodynamical processes may be controlled by the same microphysics. This view of rock deformation is significantly more unifying than current paradigm, explains many recent observations of deformation in Earth, provides the first physics-based constitutive law for transient deformation in a geologic material, and lays out several predictions and hypotheses that can be tested in the laboratory or compared to naturally deforming rocks. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ChrisThom-EOASColloquium.pdf Type: application/pdf Size: 1356886 bytes Desc: ChrisThom-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Mon Feb 15 09:15:50 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 15 Feb 2021 14:15:50 +0000 Subject: [Eoas-seminar] Thursday MET Seminar Announcement Message-ID: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 18, 2021. The speaker will be Dr. Hill of Lamount-Doherty Earth Observatory of the Columbia University. See the attached flyer for more details. Speaker: Dr. Spencer Hill, Lamount-Doherty Earth Observatory, Columbia University. Title: Advancing Understanding of Monsoons: Two Distinct but Complementary Approaches Abstract: Monsoons play a starring role in Earth?s general circulation and in the livelihoods of billions of people. Accurate predictions of monsoon rainfall variations from intraseasonal to centennial timescales, both natural and human-induced, would be of tremendous value but have proved vexing. This isn?t shocking, given that our conceptual understanding of some of the most basic characteristics of monsoonal overturning circulations generally and of real-world systems such as the Indian monsoon remains incomplete. In this talk, I describe two approaches, one highly theoretical and the other highly empirical, I have employed in recent years to attack this knowledge gap. The first combines analytical theory and simulations in idealized climate models to develop a new theory for the extent of the ascending and descending branches of zonally averaged monsoonal circulations (i.e. the solsticial Hadley cell). The second uses gauge-based rainfall data in India to delineate the mechanisms linking interannual variability in Indian summer monsoon rainfall within sub-regions of the subcontinent. Time: 3:30 PM, Thursday, Feb. 18, 2021 Zoom Link: https://fsu.zoom.us/j/92495409312?pwd=VklzSHdVY0JOUzdDODg4TzJGbnhkdz09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will starts immediately after seminar. Look forward to seeing you then. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Hill.pdf Type: application/pdf Size: 984312 bytes Desc: MET_Seminar_Flyer_Hill.pdf URL: From eoas-seminar at lists.fsu.edu Mon Feb 15 09:25:54 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 15 Feb 2021 14:25:54 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Feb 18th 2:30 PM Message-ID: Dear all, Elvira Mulyukova is candidate for the faculty search in "Geophysics?. She will be visting us (virtual) on Feb 18th and Feb 19th. Please email me: mmookherjee at fsu.edu and let me know if you would like to meet the candidate. I am also attaching the title and abstract of her talk. The talk is scheduled at 2:30 PM on 18th February 2021 (Thursday). Note that this talk is scheduled an hour earlier than the scheduled MET talk at 3:30 PM. Zoom link for the talk: https://fsu.zoom.us/j/95854702538 Title: Grain Expectations: Microphysics of Plate Boundaries from Geological to Human Timescales Abstract: The evolution and generation of plate tectonics on Earth involves processes that range from planetary-scale mantle convection, to grain scale microphysics of rock creep. Plate motion is enabled by deformation at plate boundaries, which are narrow weak zones in the crust and lithosphere often associated with grain-size reduction, as evident in mylonites. Plate boundaries are also where most earthquakes occur, and the processes leading to their weakness may also play a role in seismic cycles. Deformation at tectonic plate boundaries is governed by the mechanical properties of crustal and lithospheric rock, which evolve through changes in the microstructure of its constituent minerals. Geological observations of microstructure can, therefore, be used to tease out the rock's deformation conditions, for example through the use of various piezometers (e.g., the relationship between stress and grain size or dislocation density). In this talk, I will present a new theoretical model coupling the evolution of grain boundaries and dislocations to rock deformation and tectonic activity. The model makes a novel prediction that the equilibrium dislocation density at a given stress can be non-unique, with co-existing deformation states or piezometric branches. Grain size plays the determining role as to which piezometric branch is manifested in a deforming rock. Therefore, in order to infer stress from observed microstructure, both measurements of grain size and dislocation density are necessary. Furthermore, the model predicts that the competition between microphysical processes, such as the motion of dislocations in the crystal lattice, and the growth of mineral grains, causes transitions in the deformational response of rocks to changes in stress. Thus, the new theory provides a microphysical model for transient rheological behavior, which is particularly relevant to tectonic activity in which deformation is relatively rapid and where the steady state flow laws are a poor approximation, such as during postseismic relaxation or postglacial rebound. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ElviraMulyukova-EOASColloquium.pdf Type: application/pdf Size: 611727 bytes Desc: ElviraMulyukova-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Mon Feb 15 09:33:18 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 15 Feb 2021 14:33:18 +0000 Subject: [Eoas-seminar] Thursday MET Seminar Announcement In-Reply-To: References: Message-ID: Dear all, As Dr. Wu mentioned, we will have a graduate student Q&A session immediately following Dr. Hill?s seminar, which will be moderated by Evan Jones. Students, please stay after to chat with Dr. Hill about anything related to his research or work/life/career balance! Dr. Hill is a postdoc who studies tropical overturning circulations like monsoons, Hadley Cells, and the ITCZ. He also co-leads the DIYnamics projects that develops kits for doing rotating tank experiments from household items, and is involved in developing Python software tools. More information is available on his website https://www.ldeo.columbia.edu/~shill/ If anyone else is interested in meeting with Dr. Hill, either before or after his seminar, please contact Dr. Hill directly at shill at ldeo.columbia.edu. Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 15, 2021, at 9:15 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 18, 2021. The speaker will be Dr. Hill of Lamount-Doherty Earth Observatory of the Columbia University. See the attached flyer for more details. Speaker: Dr. Spencer Hill, Lamount-Doherty Earth Observatory, Columbia University. Title: Advancing Understanding of Monsoons: Two Distinct but Complementary Approaches Abstract: Monsoons play a starring role in Earth?s general circulation and in the livelihoods of billions of people. Accurate predictions of monsoon rainfall variations from intraseasonal to centennial timescales, both natural and human-induced, would be of tremendous value but have proved vexing. This isn?t shocking, given that our conceptual understanding of some of the most basic characteristics of monsoonal overturning circulations generally and of real-world systems such as the Indian monsoon remains incomplete. In this talk, I describe two approaches, one highly theoretical and the other highly empirical, I have employed in recent years to attack this knowledge gap. The first combines analytical theory and simulations in idealized climate models to develop a new theory for the extent of the ascending and descending branches of zonally averaged monsoonal circulations (i.e. the solsticial Hadley cell). The second uses gauge-based rainfall data in India to delineate the mechanisms linking interannual variability in Indian summer monsoon rainfall within sub-regions of the subcontinent. Time: 3:30 PM, Thursday, Feb. 18, 2021 Zoom Link: https://fsu.zoom.us/j/92495409312?pwd=VklzSHdVY0JOUzdDODg4TzJGbnhkdz09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will starts immediately after seminar. Look forward to seeing you then. 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 Feb 16 09:16:59 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 16 Feb 2021 14:16:59 +0000 Subject: [Eoas-seminar] EOAS Diversity, Equity, and Inclusion meeting Message-ID: Dear All, The next meeting of the EOAS Diversity, Equity, and Inclusion meeting will be Weds, March 10th at 9:00 am: https://fsu.zoom.us/j/95215916582 All are welcome to attend. Sincerely, Angie Knapp -- ************************************************ Angela Knapp Associate Professor Earth, Ocean, and Atmospheric Science Building, Room 5007 Earth, Ocean and Atmospheric Science Dept. Florida State University Shipping Address: Florida State University EOAS Dept., Room 2013, 1011 Academic Way Tallahassee, FL 32306-4520 Office: (850) 644-0259 anknapp at fsu.edu http://myweb.fsu.edu/anknapp/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Feb 16 10:04:53 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 16 Feb 2021 15:04:53 +0000 Subject: [Eoas-seminar] Geophysics Job Talk Today @ 3:30 PM Message-ID: https://fsu.zoom.us/j/93159238156 Title: The steady-state and transient strength of rocks: Recent advances and future directions Abstract: The brittle and viscous rheology (flow) of Earth?s lithosphere (the outer ~100 km of rock) exerts a first order control on numerous geological phenomena such as the nucleation of earthquakes, post-seismic creep, post-glacial isostatic readjustment, and large-scale bending of tectonic plates at subduction zones. Because these processes occur over timescales of decades to millions of years, it is not straightforward to infer the strength of deforming rocks solely from geophysical observations. Numerical modeling is another commonly used and complementary approach, but quantitative constitutive laws are required as inputs. Thus, experimental rock mechanics has become a critical link to understanding geophysical and geodynamical phenomena by developing steady-state ?flow laws? to describe the strength of rocks as a function of variables such as temperature, pressure, deformation rate, and grain size. However, many open questions remain on the details of the micromechanics of deformation at steady-state, and no physics-based transient ?flow laws? exist to describe the emerging richness and variability of deformation around major fault zones (e.g., slow slip earthquakes and time-dependent viscosity). In this talk, I will present some of my major contributions to rock deformation over the past few years, which utilize non-conventional experimental rock deformation techniques such as nanoindentation and uniaxial stress-reduction tests. These unique methods allow me to achieve deformation conditions that are unattainable in more conventional apparatus. My work thus far has culminated in a new microphysics-based model that can capture both the steady-state and transient deformation of rocks at high temperature in the laboratory. The microphysical mechanisms that give rise to the complex behavior also occur at deformation conditions over the entire thickness of Earth?s lithosphere, suggesting that many different geophysical and geodynamical processes may be controlled by the same microphysics. This view of rock deformation is significantly more unifying than current paradigm, explains many recent observations of deformation in Earth, provides the first physics-based constitutive law for transient deformation in a geologic material, and lays out several predictions and hypotheses that can be tested in the laboratory or compared to naturally deforming rocks. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ChrisThom-EOASColloquium.pdf Type: application/pdf Size: 417148 bytes Desc: ChrisThom-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Tue Feb 16 10:52:06 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 16 Feb 2021 15:52:06 +0000 Subject: [Eoas-seminar] Reminder: Geology Thesis Defense - Jennifer Fought - Feb 17, 2:00p - zoom Message-ID: Geology Thesis Defense - Jennifer Fought - Feb 17, 2:00p Title: GEOLOGY OF THE EASTERN BLUE RIDGE IN THE NAPOLEON 7.5' QUADRANGLE IN EAST CENTRAL ALABAMA AND WEST CENTRAL GEORGIA Major Professor: Jim Tull Join Zoom Meeting https://urldefense.com/v3/__https://fsu.zoom.us/j/93715242183__;!!PhOWcWs!h6vsvoz_WPMv6AR1uanpm1OIV9JluwDgo7nwh5_-XTT5K_VSjxNtQ2WuUIAr0E8$ Meeting ID: 937 1524 2183 One tap mobile +13017158592,,93715242183# US (Washington DC) 13126266799,,93715242183# +US (Chicago) Dial by your location +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) Meeting ID: 937 1524 2183 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Wed Feb 17 10:28:41 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 17 Feb 2021 15:28:41 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Feb 18th 2:30 PM Message-ID: Dear all, Gentle reminder: Elvira Mulyukova is candidate for the faculty search in "Geophysics?. She will be visting us (virtual) on Feb 18th and Feb 19th. The title and abstract of the tack is attached. The talk is scheduled at 2:30 PM on 18th February 2021 (Thursday). Note that this talk is scheduled an hour earlier than the scheduled MET talk at 3:30 PM. Zoom link for the talk: https://fsu.zoom.us/j/95854702538 Title: Grain Expectations: Microphysics of Plate Boundaries from Geological to Human Timescales Abstract: The evolution and generation of plate tectonics on Earth involves processes that range from planetary-scale mantle convection, to grain scale microphysics of rock creep. Plate motion is enabled by deformation at plate boundaries, which are narrow weak zones in the crust and lithosphere often associated with grain-size reduction, as evident in mylonites. Plate boundaries are also where most earthquakes occur, and the processes leading to their weakness may also play a role in seismic cycles. Deformation at tectonic plate boundaries is governed by the mechanical properties of crustal and lithospheric rock, which evolve through changes in the microstructure of its constituent minerals. Geological observations of microstructure can, therefore, be used to tease out the rock's deformation conditions, for example through the use of various piezometers (e.g., the relationship between stress and grain size or dislocation density). In this talk, I will present a new theoretical model coupling the evolution of grain boundaries and dislocations to rock deformation and tectonic activity. The model makes a novel prediction that the equilibrium dislocation density at a given stress can be non-unique, with co-existing deformation states or piezometric branches. Grain size plays the determining role as to which piezometric branch is manifested in a deforming rock. Therefore, in order to infer stress from observed microstructure, both measurements of grain size and dislocation density are necessary. Furthermore, the model predicts that the competition between microphysical processes, such as the motion of dislocations in the crystal lattice, and the growth of mineral grains, causes transitions in the deformational response of rocks to changes in stress. Thus, the new theory provides a microphysical model for transient rheological behavior, which is particularly relevant to tectonic activity in which deformation is relatively rapid and where the steady state flow laws are a poor approximation, such as during postseismic relaxation or postglacial rebound. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ElviraMulyukova-EOASColloquium.pdf Type: application/pdf Size: 611727 bytes Desc: ElviraMulyukova-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Thu Feb 18 09:43:36 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 18 Feb 2021 14:43:36 +0000 Subject: [Eoas-seminar] Reminder: MET seminar at 3:30 PM on Thursday, Feb. 18, 2021 Message-ID: Hi all, Here is reminder that we have a MET seminar at 3:30 PM on Thursday, Feb. 18, 2021. The speaker will be Dr. Hill of Lamount-Doherty Earth Observatory of the Columbia University. See the attached flyer for more details. Speaker: Dr. Spencer Hill, Lamount-Doherty Earth Observatory, Columbia University. Title: Advancing Understanding of Monsoons: Two Distinct but Complementary Approaches Abstract: Monsoons play a starring role in Earth?s general circulation and in the livelihoods of billions of people. Accurate predictions of monsoon rainfall variations from intraseasonal to centennial timescales, both natural and human-induced, would be of tremendous value but have proved vexing. This isn?t shocking, given that our conceptual understanding of some of the most basic characteristics of monsoonal overturning circulations generally and of real-world systems such as the Indian monsoon remains incomplete. In this talk, I describe two approaches, one highly theoretical and the other highly empirical, I have employed in recent years to attack this knowledge gap. The first combines analytical theory and simulations in idealized climate models to develop a new theory for the extent of the ascending and descending branches of zonally averaged monsoonal circulations (i.e. the solsticial Hadley cell). The second uses gauge-based rainfall data in India to delineate the mechanisms linking interannual variability in Indian summer monsoon rainfall within sub-regions of the subcontinent. Time: 3:30 PM, Thursday, Feb. 18, 2021 Zoom Link: https://fsu.zoom.us/j/92495409312?pwd=VklzSHdVY0JOUzdDODg4TzJGbnhkdz09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:15 PM, instead of 3:00 PM as originally scheduled, with the same zoom link. This change will reduce the overlapping time of "Meeting the Speaker" with the seminar to be given by one of our new faculty candidates. A post-seminar student-only session will start immediately after seminar. Look forward to seeing you then. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Hill.pdf Type: application/pdf Size: 984323 bytes Desc: MET_Seminar_Flyer_Hill.pdf URL: From eoas-seminar at lists.fsu.edu Thu Feb 18 10:05:48 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 18 Feb 2021 15:05:48 +0000 Subject: [Eoas-seminar] Geophysics Job talk today @ 2:30 Message-ID: Zoom link for the talk: https://fsu.zoom.us/j/95854702538 Title: Grain Expectations: Microphysics of Plate Boundaries from Geological to Human Timescales Abstract: The evolution and generation of plate tectonics on Earth involves processes that range from planetary-scale mantle convection, to grain scale microphysics of rock creep. Plate motion is enabled by deformation at plate boundaries, which are narrow weak zones in the crust and lithosphere often associated with grain-size reduction, as evident in mylonites. Plate boundaries are also where most earthquakes occur, and the processes leading to their weakness may also play a role in seismic cycles. Deformation at tectonic plate boundaries is governed by the mechanical properties of crustal and lithospheric rock, which evolve through changes in the microstructure of its constituent minerals. Geological observations of microstructure can, therefore, be used to tease out the rock's deformation conditions, for example through the use of various piezometers (e.g., the relationship between stress and grain size or dislocation density). In this talk, I will present a new theoretical model coupling the evolution of grain boundaries and dislocations to rock deformation and tectonic activity. The model makes a novel prediction that the equilibrium dislocation density at a given stress can be non-unique, with co-existing deformation states or piezometric branches. Grain size plays the determining role as to which piezometric branch is manifested in a deforming rock. Therefore, in order to infer stress from observed microstructure, both measurements of grain size and dislocation density are necessary. Furthermore, the model predicts that the competition between microphysical processes, such as the motion of dislocations in the crystal lattice, and the growth of mineral grains, causes transitions in the deformational response of rocks to changes in stress. Thus, the new theory provides a microphysical model for transient rheological behavior, which is particularly relevant to tectonic activity in which deformation is relatively rapid and where the steady state flow laws are a poor approximation, such as during postseismic relaxation or postglacial rebound. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ElviraMulyukova-EOASColloquium.pdf Type: application/pdf Size: 611727 bytes Desc: ElviraMulyukova-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Thu Feb 18 17:27:58 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 18 Feb 2021 22:27:58 +0000 Subject: [Eoas-seminar] Thursday MET Seminar Announcement In-Reply-To: References: Message-ID: Dear all, Thank you to everyone who attended today?s MET seminar given by Dr. Spencer Hill. If you missed it, please contact Allison Wing at awing at fsu.edu to request a link to the recording (do not reply-all to this email). If you had further questions or comments that you wanted to follow up on with Dr. Hill, please contact him directly at shill at ldeo.columbia.edu. Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 15, 2021, at 9:33 AM, eoas-seminar--- via Eoas-seminar > wrote: Dear all, As Dr. Wu mentioned, we will have a graduate student Q&A session immediately following Dr. Hill?s seminar, which will be moderated by Evan Jones. Students, please stay after to chat with Dr. Hill about anything related to his research or work/life/career balance! Dr. Hill is a postdoc who studies tropical overturning circulations like monsoons, Hadley Cells, and the ITCZ. He also co-leads the DIYnamics projects that develops kits for doing rotating tank experiments from household items, and is involved in developing Python software tools. More information is available on his website https://www.ldeo.columbia.edu/~shill/ If anyone else is interested in meeting with Dr. Hill, either before or after his seminar, please contact Dr. Hill directly at shill at ldeo.columbia.edu. Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 15, 2021, at 9:15 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 18, 2021. The speaker will be Dr. Hill of Lamount-Doherty Earth Observatory of the Columbia University. See the attached flyer for more details. Speaker: Dr. Spencer Hill, Lamount-Doherty Earth Observatory, Columbia University. Title: Advancing Understanding of Monsoons: Two Distinct but Complementary Approaches Abstract: Monsoons play a starring role in Earth?s general circulation and in the livelihoods of billions of people. Accurate predictions of monsoon rainfall variations from intraseasonal to centennial timescales, both natural and human-induced, would be of tremendous value but have proved vexing. This isn?t shocking, given that our conceptual understanding of some of the most basic characteristics of monsoonal overturning circulations generally and of real-world systems such as the Indian monsoon remains incomplete. In this talk, I describe two approaches, one highly theoretical and the other highly empirical, I have employed in recent years to attack this knowledge gap. The first combines analytical theory and simulations in idealized climate models to develop a new theory for the extent of the ascending and descending branches of zonally averaged monsoonal circulations (i.e. the solsticial Hadley cell). The second uses gauge-based rainfall data in India to delineate the mechanisms linking interannual variability in Indian summer monsoon rainfall within sub-regions of the subcontinent. Time: 3:30 PM, Thursday, Feb. 18, 2021 Zoom Link: https://fsu.zoom.us/j/92495409312?pwd=VklzSHdVY0JOUzdDODg4TzJGbnhkdz09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will starts immediately after seminar. Look forward to seeing you then. Cheers, Zhaohua _______________________________________________ Eoas-seminar mailing list Eoas-seminar at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-seminar _______________________________________________ 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 18 19:11:40 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 19 Feb 2021 00:11:40 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Feb 22nd 12:00 PM Message-ID: Dear all, Richard Bono is our next ?Geophysics? faculty candidate. The talk is scheduled at 12:00 PM on 22nd February 2021 (Monday). Note: Candidate is 5 hours ahead of us i.e., GMT. Zoom: https://fsu.zoom.us/j/97635987947 Please email me: mmookherjee at fsu.edu and let me know if you would like to meet the candidate. Title: Our ancient magnetic shield: Core-to-space evolution of the geodynamo Abstract: The geodynamo is a long-lived feature of Earth generated by convection of the liquid outer core. The resulting geomagnetic field extends from the core through the solid Earth and into space, where it protects the atmosphere from erosion due to solar wind. Changes in the structure of the core and mantle influence the strength and shape of the geomagnetic field, which can affect atmospheric shielding provided by the field. Variations in the magnetic shield may have potentially impacted the evolution of life and the habitability of Earth. Here I will discuss my efforts to use paleomagnetism to understand how Earth?s magnetic field has evolved over the past four billion years using a combination of observations from the rock record, simulations using numerical dynamos, and compilations of global data sets. I will highlight some of the advancements made on determining the age of the geodynamo, onset of inner core growth, long term trends in field behavior, and inferences on the magnetic shielding during critical intervals in the evolution of life, with a look towards future work and outstanding questions. Thank you Mainak -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Richard_Bono-EOASColloquium.pdf Type: application/pdf Size: 2296252 bytes Desc: Richard_Bono-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Thu Feb 18 19:20:47 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 19 Feb 2021 00:20:47 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Feb 22nd 12:00 PM In-Reply-To: References: Message-ID: I apologize, the day in the poster was incorrect. The corrected one is attached. Thanks Mainak On Feb 18, 2021, at 7:11 PM, eoas-seminar--- via Eoas-seminar > wrote: Dear all, Richard Bono is our next ?Geophysics? faculty candidate. The talk is scheduled at 12:00 PM on 22nd February 2021 (Monday). Note: Candidate is 5 hours ahead of us i.e., GMT. Zoom: https://fsu.zoom.us/j/97635987947 Please email me: mmookherjee at fsu.edu and let me know if you would like to meet the candidate. Title: Our ancient magnetic shield: Core-to-space evolution of the geodynamo Abstract: The geodynamo is a long-lived feature of Earth generated by convection of the liquid outer core. The resulting geomagnetic field extends from the core through the solid Earth and into space, where it protects the atmosphere from erosion due to solar wind. Changes in the structure of the core and mantle influence the strength and shape of the geomagnetic field, which can affect atmospheric shielding provided by the field. Variations in the magnetic shield may have potentially impacted the evolution of life and the habitability of Earth. Here I will discuss my efforts to use paleomagnetism to understand how Earth?s magnetic field has evolved over the past four billion years using a combination of observations from the rock record, simulations using numerical dynamos, and compilations of global data sets. I will highlight some of the advancements made on determining the age of the geodynamo, onset of inner core growth, long term trends in field behavior, and inferences on the magnetic shielding during critical intervals in the evolution of life, with a look towards future work and outstanding questions. Thank you Mainak _______________________________________________ Eoas-seminar mailing list Eoas-seminar at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-seminar -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Richard_Bono-EOASColloquium.pdf Type: application/pdf Size: 2295933 bytes Desc: Richard_Bono-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Sun Feb 21 12:04:04 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Sun, 21 Feb 2021 17:04:04 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Feb 24th 3:30 PM Message-ID: Dear all, Aubreya Adams is ?Geophysics? faculty candidate. The talk is scheduled at 3:30 PM on 24th February 2021 (Wednesday). Zoom: https://fsu.zoom.us/j/99359267833 Please email me: mmookherjee at fsu.edu and let me know if you would like to meet the candidate. Title: Heterogeneity in the Alaskan Subduction Zone Abstract: The Alaskan Subduction Zone is home to numerous earthquakes and volcanic eruptions ? yet these geological hazards are not evenly distributed along the boundary. Zones that have generated megathrust earthquakes like the 1964 Good Friday Earthquake, the second largest earthquake in recorded history, border zones that have not generated large earthquakes in thousands of years. To investigate the root causes of these observed variabilities, an amphibious array of 105 broadband seismometers spanning the southern Alaskan coast collected 15 months of continuous ground motion data. These data are now being used to image the deep lithosphere and asthenosphere along the subduction zone using surface wave tomography. Models built from this technique will illuminate how differences in deep processes and structures may influence surficial tectonic behaviors and hazards. Thank you Mainak -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Aubreya_Adams-EOASColloquium.pdf Type: application/pdf Size: 1031781 bytes Desc: Aubreya_Adams-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Mon Feb 22 06:51:43 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 22 Feb 2021 11:51:43 +0000 Subject: [Eoas-seminar] Geophysics Job Talk Today at 12:00 PM Message-ID: Richard Bono is our next ?Geophysics? faculty candidate. The talk is scheduled at 12:00 PM on 22nd February 2021 (today). Note: Candidate is 5 hours ahead of us i.e., GMT. Zoom: https://fsu.zoom.us/j/97635987947 Title: Our ancient magnetic shield: Core-to-space evolution of the geodynamo Abstract: The geodynamo is a long-lived feature of Earth generated by convection of the liquid outer core. The resulting geomagnetic field extends from the core through the solid Earth and into space, where it protects the atmosphere from erosion due to solar wind. Changes in the structure of the core and mantle influence the strength and shape of the geomagnetic field, which can affect atmospheric shielding provided by the field. Variations in the magnetic shield may have potentially impacted the evolution of life and the habitability of Earth. Here I will discuss my efforts to use paleomagnetism to understand how Earth?s magnetic field has evolved over the past four billion years using a combination of observations from the rock record, simulations using numerical dynamos, and compilations of global data sets. I will highlight some of the advancements made on determining the age of the geodynamo, onset of inner core growth, long term trends in field behavior, and inferences on the magnetic shielding during critical intervals in the evolution of life, with a look towards future work and outstanding questions. ____ -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Richard_Bono-EOASColloquium.pdf Type: application/pdf Size: 2296252 bytes Desc: Richard_Bono-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Mon Feb 22 09:03:44 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 22 Feb 2021 14:03:44 +0000 Subject: [Eoas-seminar] MET seminar at 3:30 PM on Thursday, Feb. 25, 2021 Message-ID: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 25, 2021. The speaker will be Dr. Lisa Bucci of the Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. The detailed information of the seminar can also be found in the attached seminar announcement flyer. Speaker: Dr. Lisa Bucci, Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. Title: NOAA's Hurricane Field Program and its Exploration of a Doppler Wind Lidar Abstract: Each year the National Oceanic and Atmospheric Administration (NOAA) flies aircraft into and around North Atlantic and East Pacific tropical cyclones (TCs). Scientists from the Atlantic Oceanographic and Meteorological Laboratory (AOML) located in Miami, FL, use the aircraft as a flying laboratory to collect information at all stages in a TC's lifecycle. Their goals are to provide a real-time analysis of the storm structure to forecasters, deliver quality controlled observations of the atmosphere and ocean to numerical models, and test out new technologies to observe all aspects of the storm. One such wind observing technology new to the instrument suite is the airborne Doppler Wind Lidar (ADWL). The ADWL shows the potential to add unique measurements in unobserved or under observed regions of the TC. A validation study demonstrated the ADWL retrieved wind speed and directions are largely consistent with collocated independent wind observations. Finally, the preliminary impacts of these observations on numerical model analyses are presented and future benefits of this technology are discussed. Time: 3:30 PM, Thursday, Feb. 25, 2021 Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will start immediately after seminar. Look forward to seeing you then. Cheers, Zhaohua -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: MET_Seminar_Flyer_Bucci.pdf Type: application/pdf Size: 944751 bytes Desc: MET_Seminar_Flyer_Bucci.pdf URL: From eoas-seminar at lists.fsu.edu Mon Feb 22 13:48:25 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 22 Feb 2021 18:48:25 +0000 Subject: [Eoas-seminar] EOAS Colloquium Friday Feb 26th 3:30pm In-Reply-To: References: Message-ID: Hi Everyone, Please join us for this week's colloquium speaker: EOAS Seminar - Friday Feb. 26 - 3:30 pm Speaker: Dr. Moira Decima, Assistant Professor, Scripps Institution of Oceanography Website: https://www.moiradecima.com/ Seminar Title: The effect of salp blooms on trophic pathways and carbon export in the southwest Pacific Abstract: The potential role of salp blooms in biogeochemistry was initially proposed 4 decades ago ? their rapid population growth rates coupled with production of fast sinking pellets could lead to massive exports of carbon. Investigating this process is however complicated by the unpredictability, in time and space, of salp blooms in the world ocean. However, in the Southern Ocean, and particularly in waters surrounding New Zealand, limited evidence and anecdotal accounts indicate they are regular members of the zooplankton community, and likely play important roles in the regional food-web as well as the biological carbon pump. During this talk, I will present results from three cruises conducted in the vicinity of the Chatham Rise, east of New Zealand. Two cruises exploring spatial variability in trophic flows between winter and summer indicate substantial differences in regions where Salpa fusiformis were abundant. Results from a cruise specifically designed to investigate the effects of salp blooms on biogeochemistry, the Salp Particle expOrt and Ocean Production (SalpPOOP) voyage, indicate medium-sized blooms of the salp Salpa thompsoni have high grazing rates removing large amounts of phytoplankton, and their fecal pellet production results in ~5-fold increases in carbon export below the euphotic zone and to mesopelagic depths. Zoom information Michael Stukel is inviting you to a scheduled Zoom meeting. Topic: EOAS Seminar - Moira Decima Time: Feb 26, 2021 03:30 PM Eastern Time (US and Canada) Join Zoom Meeting https://fsu.zoom.us/j/91935147386 Meeting ID: 919 3514 7386 One tap mobile +13126266799,,91935147386# US (Chicago) +16465588656,,91935147386# US (New York) Dial by your location +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) +1 301 715 8592 US (Washington DC) +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) +1 253 215 8782 US (Tacoma) Meeting ID: 919 3514 7386 Find your local number: https://fsu.zoom.us/u/abMjA8Ty7U Join by SIP 91935147386 at zoomcrc.com Join by H.323 162.255.37.11 (US West) 162.255.36.11 (US East) 115.114.131.7 (India Mumbai) 115.114.115.7 (India Hyderabad) 213.19.144.110 (Amsterdam Netherlands) 213.244.140.110 (Germany) 103.122.166.55 (Australia Sydney) 103.122.167.55 (Australia Melbourne) 149.137.40.110 (Singapore) 64.211.144.160 (Brazil) 69.174.57.160 (Canada Toronto) 65.39.152.160 (Canada Vancouver) 207.226.132.110 (Japan Tokyo) 149.137.24.110 (Japan Osaka) Meeting ID: 919 3514 7386 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Tue Feb 23 17:38:19 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Tue, 23 Feb 2021 22:38:19 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Feb 24th 3:30 PM Message-ID: Dear all, Aubreya Adams is ?Geophysics? faculty candidate. The talk is scheduled at 3:30 PM on 24th February 2021 (Wednesday). Zoom: https://fsu.zoom.us/j/99359267833 Title: Heterogeneity in the Alaskan Subduction Zone Abstract: The Alaskan Subduction Zone is home to numerous earthquakes and volcanic eruptions ? yet these geological hazards are not evenly distributed along the boundary. Zones that have generated megathrust earthquakes like the 1964 Good Friday Earthquake, the second largest earthquake in recorded history, border zones that have not generated large earthquakes in thousands of years. To investigate the root causes of these observed variabilities, an amphibious array of 105 broadband seismometers spanning the southern Alaskan coast collected 15 months of continuous ground motion data. These data are now being used to image the deep lithosphere and asthenosphere along the subduction zone using surface wave tomography. Models built from this technique will illuminate how differences in deep processes and structures may influence surficial tectonic behaviors and hazards. Thanks Mainak -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Aubreya_Adams-EOASColloquium.pdf Type: application/pdf Size: 1031781 bytes Desc: Aubreya_Adams-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Wed Feb 24 14:00:28 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Wed, 24 Feb 2021 19:00:28 +0000 Subject: [Eoas-seminar] Geophysics Job Talk, Today @ 3:30 PM Message-ID: Dear all, Aubreya Adams is ?Geophysics? faculty candidate. The talk is scheduled at 3:30 PM on Today. Zoom: https://fsu.zoom.us/j/99359267833 Title: Heterogeneity in the Alaskan Subduction Zone Abstract: The Alaskan Subduction Zone is home to numerous earthquakes and volcanic eruptions ? yet these geological hazards are not evenly distributed along the boundary. Zones that have generated megathrust earthquakes like the 1964 Good Friday Earthquake, the second largest earthquake in recorded history, border zones that have not generated large earthquakes in thousands of years. To investigate the root causes of these observed variabilities, an amphibious array of 105 broadband seismometers spanning the southern Alaskan coast collected 15 months of continuous ground motion data. These data are now being used to image the deep lithosphere and asthenosphere along the subduction zone using surface wave tomography. Models built from this technique will illuminate how differences in deep processes and structures may influence surficial tectonic behaviors and hazards. Thanks Mainak -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Aubreya_Adams-EOASColloquium.pdf Type: application/pdf Size: 1031781 bytes Desc: Aubreya_Adams-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Thu Feb 25 10:43:43 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 25 Feb 2021 15:43:43 +0000 Subject: [Eoas-seminar] Reminder: MET seminar at Today at 3:30 PM In-Reply-To: References: Message-ID: Hi all, Just a reminder of today?s MET seminar at 3:30 PM! Dr. Lisa Bucci from NOAA?s Hurricane Research Division will speak about ?NOAA?s Hurricane Field Program and its Exploration of a Doppler Wind Lidar?. Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 Students, please stay after the seminar for a Q&A with the speaker! Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 22, 2021, at 9:03 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 25, 2021. The speaker will be Dr. Lisa Bucci of the Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. The detailed information of the seminar can also be found in the attached seminar announcement flyer. Speaker: Dr. Lisa Bucci, Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. Title: NOAA's Hurricane Field Program and its Exploration of a Doppler Wind Lidar Abstract: Each year the National Oceanic and Atmospheric Administration (NOAA) flies aircraft into and around North Atlantic and East Pacific tropical cyclones (TCs). Scientists from the Atlantic Oceanographic and Meteorological Laboratory (AOML) located in Miami, FL, use the aircraft as a flying laboratory to collect information at all stages in a TC's lifecycle. Their goals are to provide a real-time analysis of the storm structure to forecasters, deliver quality controlled observations of the atmosphere and ocean to numerical models, and test out new technologies to observe all aspects of the storm. One such wind observing technology new to the instrument suite is the airborne Doppler Wind Lidar (ADWL). The ADWL shows the potential to add unique measurements in unobserved or under observed regions of the TC. A validation study demonstrated the ADWL retrieved wind speed and directions are largely consistent with collocated independent wind observations. Finally, the preliminary impacts of these observations on numerical model analyses are presented and future benefits of this technology are discussed. Time: 3:30 PM, Thursday, Feb. 25, 2021 Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will start immediately after seminar. Look forward to seeing you then. 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 Thu Feb 25 10:47:42 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 25 Feb 2021 15:47:42 +0000 Subject: [Eoas-seminar] Reminder: MET seminar at Today at 3:30 PM In-Reply-To: <5D620A2C-01C6-4F98-84BD-637A2FF244B8@fsu.edu> References: , <5D620A2C-01C6-4F98-84BD-637A2FF244B8@fsu.edu> Message-ID: Hi Alli, Thank you very much for sending out the reminder. I apologize for not sending it out earlier today. I was caught in collecting/compiling the prelim/comp questions and writing emails to faculties who haven't sent their questions in and forgot to send the reminder out. Best, Zhaohua ________________________________ From: 'Allison Wing' via info at coaps Sent: Thursday, February 25, 2021 10:43 AM To: eoas-seminar at lists.fsu.edu Cc: info at coaps.fsu.edu Subject: [INFO] Reminder: MET seminar at Today at 3:30 PM Hi all, Just a reminder of today?s MET seminar at 3:30 PM! Dr. Lisa Bucci from NOAA?s Hurricane Research Division will speak about ?NOAA?s Hurricane Field Program and its Exploration of a Doppler Wind Lidar?. Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 Students, please stay after the seminar for a Q&A with the speaker! Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 22, 2021, at 9:03 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 25, 2021. The speaker will be Dr. Lisa Bucci of the Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. The detailed information of the seminar can also be found in the attached seminar announcement flyer. Speaker: Dr. Lisa Bucci, Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. Title: NOAA's Hurricane Field Program and its Exploration of a Doppler Wind Lidar Abstract: Each year the National Oceanic and Atmospheric Administration (NOAA) flies aircraft into and around North Atlantic and East Pacific tropical cyclones (TCs). Scientists from the Atlantic Oceanographic and Meteorological Laboratory (AOML) located in Miami, FL, use the aircraft as a flying laboratory to collect information at all stages in a TC's lifecycle. Their goals are to provide a real-time analysis of the storm structure to forecasters, deliver quality controlled observations of the atmosphere and ocean to numerical models, and test out new technologies to observe all aspects of the storm. One such wind observing technology new to the instrument suite is the airborne Doppler Wind Lidar (ADWL). The ADWL shows the potential to add unique measurements in unobserved or under observed regions of the TC. A validation study demonstrated the ADWL retrieved wind speed and directions are largely consistent with collocated independent wind observations. Finally, the preliminary impacts of these observations on numerical model analyses are presented and future benefits of this technology are discussed. Time: 3:30 PM, Thursday, Feb. 25, 2021 Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will start immediately after seminar. Look forward to seeing you then. 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 Thu Feb 25 17:15:27 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Thu, 25 Feb 2021 22:15:27 +0000 Subject: [Eoas-seminar] Geophysics Job Talk Monday, March 1st @ 3:30 PM Message-ID: Dear all, Neala Creasy is candidate for the faculty search in "Geophysics?. Her virtual visit dates are March 1st and 2nd. Please email me: mmookherjee at fsu.edu and let me know if you would like to meet the candidate. I am also attaching the title, abstract, and a poster with relevant details. Zoom link for the talk: https://fsu.zoom.us/j/93286142639 Date and Time: March 1st 3:30 PM Title: Deep Earth Seismology: Revealing the Birth of Plumes and the Death of Plates Abstract: Plate tectonics represents the surface expression of Earth?s convecting mantle, resulting from the continued cooling of the planet. Solid-state mantle convection drives subducting plates/slabs into the deep mantle, while driving plumes up to the surface as hotspot volcanism. Earthquake seismology has the power to image the interior of the planet to better understand these processes. While general seismic imaging (such as tomography or waveform modelling) can reveal the locations, properties, and dimensions of deep mantle objects (plumes, slabs, etc.), it cannot reveal the context of these features in relation to mantle flow. Therefore, the main way to characterize mantle flow is with seismic anisotropy (how seismic wave speeds change with direction). In this seminar, I illustrate the links that I have made between seismic observations, mineral physics experiments, and dynamics with an emphasis on the lowermost mantle (the D? region: 200-300 km thick region directly above the core mantle boundary). Based on recent modeling of anisotropy, we have been able to better constrain likely mechanisms for D?-anisotropy and possible directions of flow. However, these models are based on ray theory, an infinite frequency approximation to the wave equation. In my current research, I am exploring the limits of ray theory as applied to seismic anisotropy and imaging in general. I use 3D numerical modeling of the wave equation to explore finite frequency effects on seismic observations, such as anisotropy. In the future, I would like to better understand features in the deep mantle and core by the following: (1) expanding the number of observations of seismic heterogeneities and anisotropy in the deep Earth; (2) using full-waveform modeling to better constrain the mechanism of anisotropy in the D? layer; (3) better image and model the Earth?s outer core; and (4) work towards global full waveform inversion of shear wave splitting. Thanks 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: Neala_Creasy-EOASColloquium.pdf Type: application/pdf Size: 359625 bytes Desc: Neala_Creasy-EOASColloquium.pdf URL: From eoas-seminar at lists.fsu.edu Fri Feb 26 08:59:07 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 26 Feb 2021 13:59:07 +0000 Subject: [Eoas-seminar] REMINDER TODAY _ Fwd: EOAS Colloquium Friday Feb 26th 3:30pm In-Reply-To: References: Message-ID: Hi Everyone, Please join us for this week's colloquium speaker TODAY: EOAS Seminar - Friday Feb. 26 - 3:30 pm Speaker: Dr. Moira Decima, Assistant Professor, Scripps Institution of Oceanography Website: https://www.moiradecima.com/ Seminar Title: The effect of salp blooms on trophic pathways and carbon export in the southwest Pacific Abstract: The potential role of salp blooms in biogeochemistry was initially proposed 4 decades ago ? their rapid population growth rates coupled with production of fast sinking pellets could lead to massive exports of carbon. Investigating this process is however complicated by the unpredictability, in time and space, of salp blooms in the world ocean. However, in the Southern Ocean, and particularly in waters surrounding New Zealand, limited evidence and anecdotal accounts indicate they are regular members of the zooplankton community, and likely play important roles in the regional food-web as well as the biological carbon pump. During this talk, I will present results from three cruises conducted in the vicinity of the Chatham Rise, east of New Zealand. Two cruises exploring spatial variability in trophic flows between winter and summer indicate substantial differences in regions where Salpa fusiformis were abundant. Results from a cruise specifically designed to investigate the effects of salp blooms on biogeochemistry, the Salp Particle expOrt and Ocean Production (SalpPOOP) voyage, indicate medium-sized blooms of the salp Salpa thompsoni have high grazing rates removing large amounts of phytoplankton, and their fecal pellet production results in ~5-fold increases in carbon export below the euphotic zone and to mesopelagic depths. Zoom information Michael Stukel is inviting you to a scheduled Zoom meeting. Topic: EOAS Seminar - Moira Decima Time: Feb 26, 2021 03:30 PM Eastern Time (US and Canada) Join Zoom Meeting https://fsu.zoom.us/j/91935147386 Meeting ID: 919 3514 7386 One tap mobile +13126266799,,91935147386# US (Chicago) +16465588656,,91935147386# US (New York) Dial by your location +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) +1 301 715 8592 US (Washington DC) +1 346 248 7799 US (Houston) +1 669 900 9128 US (San Jose) +1 253 215 8782 US (Tacoma) Meeting ID: 919 3514 7386 Find your local number: https://fsu.zoom.us/u/abMjA8Ty7U Join by SIP 91935147386 at zoomcrc.com Join by H.323 162.255.37.11 (US West) 162.255.36.11 (US East) 115.114.131.7 (India Mumbai) 115.114.115.7 (India Hyderabad) 213.19.144.110 (Amsterdam Netherlands) 213.244.140.110 (Germany) 103.122.166.55 (Australia Sydney) 103.122.167.55 (Australia Melbourne) 149.137.40.110 (Singapore) 64.211.144.160 (Brazil) 69.174.57.160 (Canada Toronto) 65.39.152.160 (Canada Vancouver) 207.226.132.110 (Japan Tokyo) 149.137.24.110 (Japan Osaka) Meeting ID: 919 3514 7386 -------------- next part -------------- An HTML attachment was scrubbed... URL: From eoas-seminar at lists.fsu.edu Fri Feb 26 15:35:47 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Fri, 26 Feb 2021 20:35:47 +0000 Subject: [Eoas-seminar] Reminder: MET seminar at Today at 3:30 PM In-Reply-To: References: Message-ID: Thanks to all who joined us for Dr. Lisa Bucci?s meteorology seminar yesterday. If you missed it and would like the link to the recording, please contact Allison Wing at awing at fsu.edu; do not reply all to this email. Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 25, 2021, at 10:43 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi all, Just a reminder of today?s MET seminar at 3:30 PM! Dr. Lisa Bucci from NOAA?s Hurricane Research Division will speak about ?NOAA?s Hurricane Field Program and its Exploration of a Doppler Wind Lidar?. Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 Students, please stay after the seminar for a Q&A with the speaker! Cheers, Allison ?????????????????? Allison Wing, Ph.D. Assistant Professor Earth, Ocean and Atmospheric Science Florida State University awing at fsu.edu On Feb 22, 2021, at 9:03 AM, eoas-seminar--- via Eoas-seminar > wrote: Hi all, Here is announcement that we have a MET seminar at 3:30 PM on Thursday, Feb. 25, 2021. The speaker will be Dr. Lisa Bucci of the Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. The detailed information of the seminar can also be found in the attached seminar announcement flyer. Speaker: Dr. Lisa Bucci, Hurricane Research Division, NOAA's Atlantic Oceanographic and Meteorological Laboratory. Title: NOAA's Hurricane Field Program and its Exploration of a Doppler Wind Lidar Abstract: Each year the National Oceanic and Atmospheric Administration (NOAA) flies aircraft into and around North Atlantic and East Pacific tropical cyclones (TCs). Scientists from the Atlantic Oceanographic and Meteorological Laboratory (AOML) located in Miami, FL, use the aircraft as a flying laboratory to collect information at all stages in a TC's lifecycle. Their goals are to provide a real-time analysis of the storm structure to forecasters, deliver quality controlled observations of the atmosphere and ocean to numerical models, and test out new technologies to observe all aspects of the storm. One such wind observing technology new to the instrument suite is the airborne Doppler Wind Lidar (ADWL). The ADWL shows the potential to add unique measurements in unobserved or under observed regions of the TC. A validation study demonstrated the ADWL retrieved wind speed and directions are largely consistent with collocated independent wind observations. Finally, the preliminary impacts of these observations on numerical model analyses are presented and future benefits of this technology are discussed. Time: 3:30 PM, Thursday, Feb. 25, 2021 Zoom Link: https://fsu.zoom.us/j/97597910965?pwd=cVBoNlQ5MEtwRlFTM2Y0WG1DbHFGQT09 It is noted that the pre-seminar session, "Meeting the Speaker," will start at 3:00 PM with the same zoom link. A post-seminar student only session will start immediately after seminar. Look forward to seeing you then. Cheers, Zhaohua _______________________________________________ Eoas-seminar mailing list Eoas-seminar at lists.fsu.edu https://lists.fsu.edu/mailman/listinfo/eoas-seminar _______________________________________________ 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 Sun Feb 28 22:14:11 2021 From: eoas-seminar at lists.fsu.edu (eoas-seminar at lists.fsu.edu) Date: Mon, 1 Mar 2021 03:14:11 +0000 Subject: [Eoas-seminar] Geophysics Job Talk Monday, March 3rd@ 3:30 PM Message-ID: Dear all, Johnny Seales is a candidate for the faculty search in Geophysics. His virtual visit dates are March 3rd-4th. Please email me: mmookherjee at fsu.edu and let me know if you would like to meet the candidate. I am also attaching the title, abstract, and a poster with relevant details. Zoom link for the talk: https://fsu.zoom.us/j/99846006873 Date and Time: March 3rd 3:30 PM Title: Deep Volatile Cycles and the Thermal History of the Earth Abstract: Volatile cycles play a key role in sustaining habitable surface conditions for the Earth. The cycling of volatiles between surface and interior reservoirs depends on the Earth?s internal dynamics. Volcanism transfers volatiles from the Earth?s interior to its surface, while subduction cycles volatiles into the interior. Here I will demonstrate the influence of the deep water and carbon cycles on the Earth system. The balance of water in the mantle affects mantle viscosity, which, in turn, influences convection and plate tectonics. Age dated rock samples suggest that Earth had a multi-staged cooling history. I will show that the first stage of less efficient mantle cooling is attributable to the effects of water cycling on mantle viscosity. A change from net mantle dewatering to rewatering is predicted to occur at approximately 2.5 billion years ago. This alters the relative influence of thermal to water cycling and leads to more rapid cooling. This timing coincides with the Great Oxidation Event which can also be connected to the coupling between volatile cycling and mantle dynamics. I will show that an increase in the flux of carbonates and organics, to different mantle depths, and delivery back to the surface can explain the rise of oxygen and the most positive d13C carbonate excursion in the Earth?s history. A final aspect I will explore is the role of deep volatile cycling on maintaining surface temperatures that allow for liquid water. We know that our own planet has had water at the surface for billions of years. Accounting for carbon and water cycling, I will show that terrestrial planets, akin to Earth, may have first had surface temperatures warm enough for liquid water over a time window that spans billions of years. This last analysis will show that Earth may fall in the tail of a galactic distribution of planets that allow for surface water over their evolutions. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Johnny_Seales-EOASColloquium.pdf Type: application/pdf Size: 752555 bytes Desc: Johnny_Seales-EOASColloquium.pdf URL: