Events
Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
6 | 7 | 8 | 9 | 10 | 11 | 12 |
13 | 14 | 15 | 16 | 17 | 18 | 19 |
20 | 21 | 22 | 23 | 24 | 25 | 26 |
27 | 28 | 29 | 30 | 31 |
Legend | |||||||||||
JSG | BEG | UTIG | EPS |
Lithosphere and Dynamic Earth seminar: Wanying Wang
Start:December 1, 2021 at 12:00 pm
End:
December 1, 2021 at 1:00 pm
DeFord Lecture | Steven Davis
Start:December 2, 2021 at 4:00 pm
End:
December 2, 2021 at 5:00 pm
Location:
https://utexas.zoom.us/j/96370762511
Contact:
John Lassiter
View Event
Global and regional drivers of land-use emissions
Dr. Steven Davis, University of California, Irvine
Abstract: Human uses of land have transformed and fragmented ecosystems, degraded biodiversity, disrupted carbon and nitrogen cycles and added prodigious quantities of greenhouse gases (GHGs) to the atmosphere. However, in contrast to fossil-fuel carbon dioxide (CO2) emissions, trends and drivers of GHG emissions from land use (including both land-use change and agriculture) have not been as comprehensively and systematically assessed. I’ll present recent work my group has done to analyze country-, process-, GHG- and product-specific inventories of global land-use emissions over the last half-century, including uncertainties and decomposition of key demographic, economic, and technical drivers. I’ll then present results of a related analysis of the land-use emissions embodied in international trade and discuss implications for mitigation efforts. Finally, I’ll briefly introduce the Carbon Monitor, an international collaboration hatched during the pandemic to estimate global, country, and U.S. state-level fossil emissions in near real time.
DeFord Lecture Series
Since the 1940’s, the DeFord (Technical Sessions) lecture series, initially the official venue for disseminating EPS graduate student research, is a forum for lectures by distinguished visitors and members of our community. This is made possible through a series of endowments.
BEG Seminar: Richard Sech - Shell
Start:December 3, 2021 at 9:00 am
End:
December 3, 2021 at 10:00 am
Location:
Zoom or PRC, BEG Bldg. 130, Main Conference Room 1.202
Contact:
Dena Miller, dena.miller@beg.utexas.edu
View Event
Bureau Seminar Series
UTIG Seminar Series: Lynnae Quick, NASA Goddard
Start:December 3, 2021 at 10:30 am
End:
December 3, 2021 at 11:30 am
Location:
Zoom Meeting
Contact:
Constantino Panagopulos, costa@ig.utexas.edu, 512-574-7376
View Event
Speaker: Lynnae Quick, NASA Goddard Space Flight Center
Host: Krista Soderlund
Title: Cryovolcanism on Ocean Worlds Near and Far
Water, Climate and Environment Seminar | Xinyue Ye - Texas A&M U.
Start:December 3, 2021 at 12:00 pm
End:
December 3, 2021 at 1:00 pm
Location:
Online
Contact:
Cansu Demir, cdemir@utexas.edu
View Event
Urban development and its interactions with climate, water and environment
EPS Faculty Meeting
Start:December 7, 2021 at 12:30 pm
End:
December 7, 2021 at 1:45 pm
Masters "Thursday" Presentations
Start:December 9, 2021 at 12:30 pm
End:
December 9, 2021 at 2:00 pm
Contact:
John Lassiter
Please help us celebrate the accomplishments of our graduating Masters students by joining us for a special DeFord Presentation next Thursday (12/9) at 12:30 pm.
Please join us at the following link: https://utexas.zoom.us/j/96370762511
This Fall’s Masters Presentations event will be “klein aber fein”, with two outstanding presentations scheduled:
Xin Liu (Advisor Mrinal Sen): Feasibility of Prediction of Principal stress from reflection seismic data
Matthew Nix (Advisor Brian Horton): Shifts in deposition, sediment dispersal, and provenance for the late Jurassic-early Cretaceous Kootenay and Blairmore Groups: Implications for foreland basin dynamics in western Canada
BEG Seminar: Olvier Duffy - Bureau of Economic Geology
Start:December 10, 2021 at 9:00 am
End:
December 10, 2021 at 10:00 am
Location:
Zoom or PRC, BEG Bldg. 130, Main Conference Room 1.202
Contact:
Dena Miller, dena.miller@beg.utexas.edu
View Event
Bureau Seminar Series
UTIG Seminar: AGU Practice Talks
Start:December 10, 2021 at 10:30 am
End:
December 10, 2021 at 11:30 am
Location:
Seminar Conference Room - Pickle Research Campus, Bldg 196-ROC 1.603
Contact:
Constantino Panagopulos, costa@ig.utexas.edu, 512-574-7376
View Event
In a now annual tradition, the last seminar of the Fall Semester features talks by UTIG graduate students.
Speakers: Cat Ross & Shuai Yan, Graduate Research Assistants, University of Texas Institute for Geophysics
Cat Ross: Zircon (U-Th)/He Impact Crater Thermochronometry and the Effects of Shock Microstructures on Helium Diffusion Kinetics
Abstract: Accurate and precise age determination of impact cratering events remains challenging and often contentious; less than half of all known craters are regarded as accurately and precisely dated. Zircon (U-Th)/He (ZHe) dating of impactites can be employed to date medium to large impact structures as ZHe ages can be fully reset in minutes at T >1000°C, a plausible scenario in the central melt pool. In contrast, complete resetting of ZHe at 200-300°C, encountered near the crater margins or due to post-impact hydrothermal overprinting, may take >103-6 years. To test the reliability of ZHe impact dating, we have quantified the effects of shock-induced microstructures on helium diffusion kinetics in well-characterized variably shocked zircon. We investigated samples from two impact structures, the Chicxulub multi-ring crater and Ries complex crater, to compare diffusion kinetics from structures with different size, age, and hydrothermal system longevity. Shock microstructures were characterized by backscattered-electron imaging prior to determining the He diffusion kinetics by prograde and retrograde fractional-release experiments via light-bulb furnace with incremental step-heating (10°C) from 300°C to 600°C. Next, we examine the internal interconnectivity and sizes of the diffusion domains by electron backscatter diffraction (EBSD). While we found that zircon with few shock microstructures exhibited no marked deviation from helium diffusion kinetics of undamaged zircon, zircon grains with planar microstructures and granular textures are characterized by a dramatic decrease in helium retentivity due to the reduction in the effective domain size and the introduction of interconnected fast diffusion pathways. A subset of grains were ZHe dated and showed that less deformed grains yielded a weighted mean age within error of the accepted impact ages, while the grains with planar microstructures or granular textures gave systematically younger ages. These new diffusion data and ZHe ages demonstrate that highly shocked grains are unsuitable for ZHe impact crater dating. Therefore, detailed characterization of impact-induced microstructures is critical for determining accurate ZHe impact ages and offers the possibility of investigating post-impact hydrothermal circulation.
Shuai Yan: A widespread subglacial hydrology system detected by airborne geophysics survey in Princess Elizabeth Land, East Antarctica
Abstract: Measurements of the subglacial topography, geology and hydrology of Princess Elizabeth Land (PEL), East Antarctica is critical for our understanding of the dynamics of the East Antarctic Ice Sheet (EAIS). However, PEL has been one of the least surveyed sectors of East Antarctica. Over the past years, several collaborative airborne geophysical surveys have been performed in PEL, aiming to fill in this gap. In this presentation, we propose to show the newly collected geophysical evidence suggesting the existence of a widespread subglacial hydrology system in PEL. This subglacial hydrology system is composed of a large subglacial lake (hereby referred as Lake Snow Eagle, LSE) that is over 40 kilometers long and 10 kilometers wide, and multiple smaller subglacial water bodies around LSE. The existence of these subglacial water bodies provides important constraints on the basal thermal condition in this region. We also propose to address the possibility that this subglacial hydrology system is connected to the coastal regions by an extensive subglacial channel network, which would make it the largest known-to-date interior Antarctic subglacial hydrology system that has a potential direct hydraulic pathway to the ocean.
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 |