Events
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JSG | BEG | UTIG | EPS |
Employer Spotlight-PBW
Start:March 1, 2016 at 10:00 am
End:
March 1, 2016 at 3:00 pm
Location:
JGB 2.112 Career Center
Contact:
Maurine Riess, mriess@jsg.utexas.edu, 512-232-7673
Representatives from Pastor, Behling & Wheeler, LLC will be in the Career Center to meet with JSG students about job opportunities. Come by anytime from 10 a.m. to 3 p.m.
Pastor, Behling & Wheeler, LLC (PBW) provides innovative and practical engineering and environmental consulting services to private sector clients, including many Fortune 500 firms, at project sites throughout the U.S.
http://www.pbwllc.com/
Employer Spotlight-AECOM
Start:March 2, 2016 at 10:00 am
End:
March 2, 2016 at 3:00 pm
Location:
JGB 2.112 Career Center
Contact:
Maurine Riess, mriess@jsg.utexas.edu, 512-232-7673
Representatives from AECOM will be in the Career Center to meet with JSG students about job opportunities. Come by anytime from 10 a.m. to 3 p.m.
Employer Spotlight-MUD Geochemical
Start:March 2, 2016 at 1:00 pm
End:
March 2, 2016 at 4:00 pm
Location:
JGB 2.112 Career Center
Contact:
Maurine Riess, mriess@jsg.utexas.edu, 512-232-7673
Representatives from MUD Geochemical will be in the Career Center to meet with JSG students about job opportunities. Come by anytime from 1:00 to 4:00 p.m.
This company is located here in Austin; owned and operated by some of our recent graduates!
http://www.mudgeochemical.com/
Employer Spotlight-TCEQ
Start:March 3, 2016 at 11:00 am
End:
March 3, 2016 at 3:00 pm
Location:
JGB 2.112 Career Center
Contact:
Maurine Riess, mriess@jsg.utexas.edu, 512-232-7673
Representatives from the Texas Commission on Environmental Quality (TCEQ) will be in the Career Center to meet with JSG students about job opportunities. Come by anytime from 11 a.m. to 3 p.m.
http://www.tceq.state.tx.us/adminservices/employ/index.html
De Ford Lecture Series: John Cottle
Start:March 3, 2016 at 4:00 pm
End:
March 3, 2016 at 5:00 pm
Location:
Boyd Auditorium
UTIG Seminar Series: Qinghua Ding, APL/University of Washington
Start:March 4, 2016 at 10:30 am
End:
March 4, 2016 at 11:30 am
Location:
PRC, 10100 Burnet Road, Bldg 196, Rm 1.603, Austin, TX 78758
Contact:
Yuko Okumura, yukoo@ig.utexas.edu, 512-471-0383
View Event
“A Global View of Large-Scale Atmospheric Circulation Variability over the Last 60 Years”
Abstract:
The Earth has warmed significantly over the past 60 years, under anthropogenic forcing. We are confident about the robustness of the global surface temperature warming pattern, which is primarily controlled by thermodynamics; however, we have much less confidence in our understanding of the atmospheric circulation aspect of climate change, which is mainly determined by these dynamics. Attribution of the cause of global circulation change over the last 60 years is hindered by our ability to separate intrinsic low-frequency variability from the forced response of the climate system to anthropogenic forcing. In this study, we characterize the spatiotemporal characteristics of intrinsic variability by comparing average Coupled Model Intercomparison Project Phase 5 (CMIP5) historical simulations to the observed trend estimated by five reanalysis data (ERA-Interim+ERA40, ERA-20c, NOAA-20th, NCEP1 and JRA55). For upper-level circulation change, both CMIP5 models and reanalysis data show that the human-caused long-term trend predominates in the tropics, and a weaker trend exists in the high latitudes of the northern and southern hemispheres.
After removing this long-term trend from the circulation field, the classical El Niño Southern Oscillation
(ENSO) appears to be the leading factor driving global circulation variability on an interannual time scale. On longer timescales, the tropical impact on global circulation is greatest over the polar regions and likely responsible for the destabilization of some ice shelves in the West Antarctic in the 1990s as well as for about half of the remarkable warming over Greenland and northeast Canada in the past 15 years and during the 1950–1960s. These findings suggest that circulation changes in the Arctic and Antarctic over the last 60 years have largely been internally driven as a result of the interdecadal-scale sea surface temperature (SST) variability in the tropics. Finally, I will suggest a way forward so that we can better understand the cause of global climate variability in the past 1000 years and improve projections of future global climate change.
Biography: Qinghua Ding received his Ph.D from the University of Hawaii in 2008. His Ph.D work was to understand the Asian monsoon variability over the last 60 years and its linkage with the global circulation variability. In 2010, he started to work at University of Washington as Research Associate on developing an isotope-enabled global climate model and understanding the recent climate change in the Arctic and Antarctic. He found that the recent warming trend in the Arctic and Antarctic is partly attributed to a tropical SST-related natural variability. He joined the Polar Science Center in 2014. For future research, his focus is on exploring polar-lower latitude connection in the past 1000 years by using isotope-enabled model and paleo-climate proxy data. The ultimate goal is to provide more reliable future projections of the polar climate response to anthropogenic climate forcing.
De Ford Lecture Series: Sarah Gleeson, University of Alberta (Canada)
Start:March 10, 2016 at 4:00 pm
End:
March 10, 2016 at 5:00 pm
UTIG Seminar Series: Mark Behn, Woods Hole Oceanographic Institution
Start:March 11, 2016 at 10:30 am
End:
March 11, 2016 at 11:30 am
Location:
PRC, 10100 Burnet Road, Bldg 196, Rm 1.603, Austin, TX 78758
Contact:
Harm Van Avendonk, harm@ig.utexas.edu, 512-471-0429
View Event
“Coupling of Ice Flow, Surface Melting, and Sub-Glacial Hydrology in the Greenland Ice Sheet”
Abstract:
During the summer months, supra-glacial melt water lakes form across the ablation zone of the Greenland Ice Sheet. Many of these lakes grow in size up to 2–5 km in diameter before draining rapidly (in minutes to hours) via hydro-fracture. These drainage events deliver large volumes of water to the bed and create conduits (e.g., moulins) that provide surface-to-bed drainage channels that remain open for the remainder of the summer melt season. This rapid influx melt water in turn influences ice sheet dynamics by modulating basal water pressure and frictional sliding at the ice-bed interface. In my talk, I will present GPS and seismic data from a network of stations operational from 2011–2014 surrounding a supra-glacial lake system in the Jakobshavn-Isbrae region of the Greenland Ice Sheet. These data are used to (1) invert for the opening history of the hydro-fracture beneath the lake in space and time, and (2) evaluate the acceleration of the ice in response to the rapid influx of surface meltwater to the bed. Our data show that ice sheet response is strongly modulated by the seasonal evolution of the subglacial hydrologic system. Lake drainages that occur early in the summer melt season have a larger and more prolonged effect on ice dynamics compared to those occurring later in the melt season. We speculate that this reflects a less efficient early season hydrologic system, which cannot rapidly evacuate the influx of melt water associated with lake drainage, allowing basal water pressure to remain high and promoting sliding. Finally, I will discuss how these individual drainage events scale up to influence regional dynamics along the western margin of the Greenland Ice Sheet.
De Ford Lecture Series: Eric Kelly
Start:March 24, 2016 at 4:00 pm
End:
March 24, 2016 at 5:00 pm
Location:
Boyd Auditorium
De Ford Lecture Series: Andy Baker, The University of New South Wales
Start:March 31, 2016 at 4:00 pm
End:
March 31, 2016 at 5:00 pm
Location:
Boyd Auditorium
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 |