Events
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JSG | BEG | UTIG | EPS |
ExxonMobil Geosciences Info Session
Start:October 2, 2017 at 5:15 pm
End:
October 2, 2017 at 6:15 pm
Location:
JGB 3.222
UTIG Brown Bag Talk: David Trossman
Start:October 4, 2017 at 12:00 pm
End:
October 4, 2017 at 1:00 pm
Location:
PRC ROC Room 1.603
Contact:
Eric Petersen, eric_petersen@utexas.edu
Informal weekly presentations by UTIG students, researchers. Bring your lunch!
DeFord Lecture: Thomas Carr
Start:October 5, 2017 at 4:00 pm
End:
October 5, 2017 at 5:00 pm
Location:
JGB 2.324
Friends and Alumni Network Board Meeting
Start:October 6, 2017 at 10:00 am
End:
October 6, 2017 at 4:00 pm
Location:
Jackson Geological Sciences Building at UT Austin
Contact:
Kristen Tucek, ktucek@jsg.utexas.edu, 512.471.2223
UTIG Seminar Series: Jaap Nienhuis (Florida State University)
Start:October 6, 2017 at 10:30 am
End:
October 6, 2017 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Predicting delta morphology and delta change on a global scale
Abstract: Coastal deltaic change is expected to be one of the major Earth-surface hazards of the 21st century. We have quantified the effect of waves, tides, and fluvial sediment supply on delta morphology, and use this theory with global wave, tide, and fluvial sediment data to make morphologic predictions for Earth’s deltas (n ~ 20000). For these deltas, we predict future changes in response to river damming, land-use changes, and climate change and find that many deltas with human-induced decreases in fluvial sediment loads will experience wave reworking into barrier islands or tide reworking into alluvial estuaries. Other deltas are projected to experience increased fluvial sediment flux, and, in some cases these growing deltas could transition to river-dominated morphologies. Our analysis provides opportunities for the inclusion of river deltas into Earth system and climate models, and for paleoenvironmental reconstructions based on delta sedimentology.
Learn more about Jaap Nienhuis
UTIG Host: John Goff
DeFord Lecture: David Gochis
Start:October 12, 2017 at 4:00 pm
End:
October 12, 2017 at 5:00 pm
Location:
JGB 2.324
UTIG Seminar Series: Duncan Young (UTIG)
Start:October 13, 2017 at 10:30 am
End:
October 13, 2017 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Sub-glacial landscapes from ice penetrating radar in Antarctica from the scale of ice cores to ice sheets scales
Abstract: The sub-glacial landscape of Antarctica is critical for understanding the evolution of the ice sheet and associated sedimentary basins, the behavior of the ice sheet’s sub-glacial water system, and site selection for deep ice sheet in situ access. However, in Antarctica we have sparse data of a range of vintages that must be used carefully to generate a full picture of the landscape, its lithological variability and interwoven water systems. In this presentation, I first describe the results of a recent high resolution survey of an ‘old ice’ site in central East Antarctica, and its implications for understanding the sub-glacial morphology. I then move out to the scale of individual sedimentary basins, with an improved method of characterizing sub-glacial water systems from range delayed scattered energy. I conclude by estimating the variation in the statistical properties of the grounded ice sheet bed at large scales for identifying major sedimentary basins and characterizing their influence on water systems and indications of their origin in time, using additional aero-geophysical datasets.
Learn more about Duncan Young
UTIG Host: Don Blankenship
UTIG Brown Bag Talk: Nicholas Hayman
Start:October 18, 2017 at 12:00 pm
End:
October 18, 2017 at 1:00 pm
Location:
PRC ROC Room 1.603
Contact:
Eric Petersen, eric_petersen@utexas.edu
Informal weekly presentations by UTIG students, researchers. Bring your lunch!
DeFord Lecture: Amy Hardberger
Start:October 19, 2017 at 4:00 pm
End:
October 19, 2017 at 5:00 pm
Location:
JGB 2.324
UTIG Seminar Series: Michelle Tigchelaar (University of Washington)
Start:October 20, 2017 at 10:30 am
End:
October 20, 2017 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Watch live: http://bit.ly/2hfVWub
Title: What drives Antarctic ice sheet evolution? Insights from 800,000 year ice sheet simulation with transient climate forcing
Abstract: Antarctic ice-sheet instabilities could become a major driver for future global sea level rise. However, the rate at which Antarctic ice-sheet mass loss will occur is a matter of intense debate and subject to large uncertainties. To further constrain the response of the Antarctic ice sheet to environmental change, it is necessary to study its sensitivity to past changes in greenhouse gas concentrations and orbital parameters. So far, long-term Antarctic simulations have used proxy-based parameterizations of climatic drivers, presuming that external forcings are applied in synchrony with each other. Here for the first time we have used a transient, three-dimensional climate simulation over the last eight glacial cycles to drive an Antarctic ice sheet model. We show that the evolution of the Antarctic ice sheet was mostly driven by CO2 and sea level forcing with a period of about 100,000 years, synchronizing both hemispheres. However, high surface melt and ice-shelf calving rates during precessionally-driven periods of austral summer insolation maxima cause a decoupling of bipolar ice-sheet variations during the warmest interglacials. Sensitivity runs with individual climatic drivers indicate that they add nonlinearly, implying that the full spectrum of climate forcing needs to be considered when evaluating the sensitivity of the Antarctic ice sheet to past and future climate change.
Learn more about Michelle Tigchelaar: http://michelletigchelaar.weebly.com
UTIG Host: Pedro Di Nezio
Alumni Reception during GSA in Seattle
Start:October 23, 2017 at 6:00 pm
End:
October 23, 2017 at 8:00 pm
Location:
Daily Grill at 629 Pike St in Seattle
Contact:
Kristen Tucek, ktucek@jsg.utexas.edu, 512.471.2223
UTIG Brown Bag Talk: Enrica Quartini
Start:October 24, 2017 at 12:00 pm
End:
October 24, 2017 at 1:00 pm
Location:
PRC ROC Room 1.603
Contact:
Eric Petersen, eric_petersen@utexas.edu
Informal weekly presentations by UTIG students, researchers. Bring your lunch!
DeFord Lecture: Daniel Fisher
Start:October 26, 2017 at 4:00 pm
End:
October 26, 2017 at 5:00 pm
Location:
JGB 2.324
UTIG Seminar Series: Karen Fischer (Brown University)
Start:October 27, 2017 at 10:30 am
End:
October 27, 2017 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Watch live: http://bit.ly/2itV6yb
Title: What puts the “plate” in plate tectonics?
Abstract: The paradigm of plate tectonics is fundamental to our understanding of the Earth, yet the question of what makes the lithosphere “plate-like” remains unanswered. As Earth’s outer thermal boundary layer, the lithosphere derives its high viscosity largely from its cold temperatures, relative to the warmer asthenosphere. However, the roles of partial melt and volatiles in further reducing asthenospheric viscosity are still debated. Seismic wave conversions generated by a velocity gradient within the lithosphere-asthenosphere transition, combined with surface wave tomography, provide key constraints on these questions.
Data from the EarthScope USArray has enabled imaging of the lithosphere-asthenosphere boundary (LAB) and discontinuities internal to the lithosphere across the contiguous U.S. Strong S-to-P (Sp) conversions from the base of the thin lithosphere in the tectonically active western U.S. indicate a vertically-localized negative velocity gradient (<40 km) that is consistent with ponded partial melt, embedded in a broader thermal gradient. In contrast, beneath the thick, stable and ancient cratonic lithosphere in the center of the continent, the typical absence of clear Sp conversions is consistent with a gradual shear velocity decrease over >80 km; patches with a sharper gradient are spatially intermittent. The very gradual cratonic lithosphere-asthenosphere boundary can be explained by temperature without the effects of higher volatile content or partial melt in the asthenosphere. Middle-aged lithosphere in the eastern U.S., largely undisturbed since Mesozoic rifting, manifests an LAB velocity gradient of intermediate sharpness, except for a few zones that correlate with low mantle velocities and the possible presence of partial melt. Across active plate boundaries, variations in the depth and amplitude of the LAB velocity gradient across rifts and strike-slip fault systems indicate localized deformation in the deep mantle lithosphere. Within the cratonic mantle lithosphere, the most widespread feature is a sub-horizontal negative velocity gradient, typically at depths of 70-90 km, that can be explained by volatile-rich products of now-solid partial melt that once ponded beneath the carbonated peridotite solidus.
Learn more about Karen Fischer
UTIG Host: Thorsten Becker
Hot Science - Cool Talk "Human Mating Behavior"
Start:October 27, 2017 at 7:00 pm
End:
October 27, 2017 at 8:15 pm
Location:
Student Activity Center (SAC)
Contact:
Didey Montoya, didey@austin.utexas.edu, 5124714211
View Event
If we all want love, why is there so much conflict in our most cherished relationships? What is evolutionary psychology and how can it provide insights to human mating behavior? Dr. Buss shares insights on how conflict, competition, and manipulation pervade human mating. Dr. Buss is signing his newest book “The Evolution of Desire” from 5:45 – 6:30 during Cool Activities. The UT Coop will have books for sale at the signing.
Due to the content of this talk, we recommend it for high school seniors, college students and adults only.
Planetary Habitability Seminar SeriesApril, 22 2024Time: 1:00 PM - 2:00 PMLocation: PMA 15.216B UT Center for Planetary Systems Habitability Seminar Series. See website for speaker schedule and more details: View Events Join remotely: https://utexas.zoom.us/j/94052130734 In person: Classroom 15.216B, Physics, Math and Astronomy Bldg. UT Austin, Department of Astronomy 2515 Speedway, Stop C1400 Austin, Texas 78712-1205 |
UTIG Discussion Hour: Nicholas Montiel - PhD Talk (UTIG)April, 23 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Cornelia Rasmussen, UTIGApril, 26 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Cornelia Rasmussen, Research Associate, University of Texas Institute for Geophysics Host: Krista Soderlund Title: The Emerging Field Of Position-Specific Isotope Analysis: Applications in chemical forensics, exobiology, geo- and environmental sciences Abstract: Complex organics can be found all over our solar system and within each living thing on our planet, be it as part of its physiology or as a contaminant. However, different processes can lead to the formation of chemical identical molecules. This makes answering a number of scientific questions challenging. One example is distinguishing between biotic and abiotic molecules, hence hindering life detection on early Earth but especially on other planetary bodies, such as on Mars, Titan, Enceladus and on meteorites where organics have been detected. Moreover, tracing molecules as they move through the environment can be demanding, yet is essential in studying the flow of organic molecules as well as correlating pollutants with their source. Novel tools to address these challenges are currently being developed. Especially, the emerging field of position-specific isotope analysis is beginning to grant access to the unique intramolecular carbon (13C/12C) isotope fingerprint preserved in complex molecules. This fingerprint can be applied in various scientific disciplines, ranging from forensics to exobiology, geo- and environmental sciences, including geo health. Nuclear magnetic resonance spectroscopy (NMR) has the potential to become a key player in this research area, as it allows the analysis of organics within complex mixtures, all without the need to fragment the molecule into single carbon units or the combustion of the molecule of interest. We have been developing several NMR tools that allow us to investigate the intramolecular carbon isotope distribution within various molecule classes and to test the central hypothesis that the position-specific carbon isotope distribution within complex organics depends on a molecule’s source and formation history. |
Planetary Habitability Seminar SeriesApril, 29 2024Time: 1:00 PM - 2:00 PMLocation: PMA 15.216B UT Center for Planetary Systems Habitability Seminar Series. See website for speaker schedule and more details: View Events Join remotely: https://utexas.zoom.us/j/94052130734 In person: Classroom 15.216B, Physics, Math and Astronomy Bldg. UT Austin, Department of Astronomy 2515 Speedway, Stop C1400 Austin, Texas 78712-1205 |
UTIG Discussion Hour: Kristian Chan - PhD Talk (UTIG)April, 30 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |