Events
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UTIG Brown Bag Talk: Liviu Giosan
Start:January 17, 2017 at 12:00 pm
End:
January 17, 2017 at 1:00 pm
Location:
PRC ROC Room 1.603
Contact:
Eric Petersen, eric_petersen@utexas.edu
Weekly informal presentations by UTIG students, researchers. Bring your lunch!
(Usually on Wednesday – this one’s special.)
UTIG Brown Bag Talk: Henning Åkesson
Start:January 18, 2017 at 12:00 pm
End:
January 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!
UTIG Seminar Series; Andre Gutscher, CNRS, University of Brest, France
Start:January 20, 2017 at 10:30 am
End:
January 20, 2017 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdlkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Geodynamics of the Calabrian subduction: Evidence from new seismic and bathymetric surveys
Abstract: Results from recent marine geophysical surveys in the forearc of the Calabrian subduction zone and adjacent Eastern Sicily margin will be presented. These data include: a new compilation of multi-beam bathymetry, high-resolution seismic profiles and wide-angle seismic profiles. Several distinct morpho-tectonic provinces are imaged by the bathymetric mapping including: the deeply incised Malta-Hyblean Escarpment, numerous submarine canyons, broad regions of relatively flat seafloor dominated by fields of sediment waves, the gently undulating anticlinal fold-and-thrust belts of the external Calabrian accretionary wedge and the adjacent portion of the Western Mediterranean Ridge. The Calabrian arc can be divided into 4 domains (from SE to NW): 1) the undeformed Ionian abyssal plain, 2) the external evaporitic wedge, 3) the internal clastic wedge, 4) the Calabrian backstop (Variscan crystalline basement). The Calabrian accretionary wedge can also be divided laterally into two major lobes, the NE- and the SW lobes, and two minor lobes. The kinematics of the limit between the two major lobes is investigated and shown to be sinistral in the external (evaporitic) wedge. A network of radial slip lines within the southernmost external wedge unequivocally demonstrate ongoing dextral displacement of a rigid indenter (representing the corner of the clastic wedge) into the evaporitic wedge thereby confirming the geodynamic model of an active lateral slab tear fault here off eastern Sicily. The slab tear produces a series of major sub-parallel dextral strike-slip faults offshore Mt. Etna and south of the Straits of Messina consistent with the relative motions between Calabria and the Peloritan domain (NE Sicily). Abundant strike-slip faulting, and wide-spread folding and thrusting observed throughout the entire accretionary wedge, indicate regional shortening between the Ionian abyssal plain (foreland) and the Calabrian – Peloritan backstop caused by active subduction. Wide-angle seismic data acquired the by the R/V Meteor in 2014 and recorded by 32 French (Ifremer) and 30 German (Geomar, Kiel) ocean-bottom seismometers and hydrophones (OBS, OBH) as well as 6 landstations (INGV Rome) image the deep crustal structure.
iPGST: Dr. Leif Karlstrom - Waves in volcanic conduits
Start:January 25, 2017 at 12:00 pm
End:
January 25, 2017 at 1:00 am
Location:
JGB 3.222
Dr. Leif Karlstrom (University of Oregon) – Waves in volcanic conduits
UTIG Brown Bag Talk: Taan Fjord & Icy Bay Team
Start:January 25, 2017 at 12:00 pm
End:
January 25, 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!
De Ford Lecture Series: Leif Karlstrom
Start:January 26, 2017 at 4:00 pm
End:
January 26, 2017 at 5:00 pm
Location:
JGB2.324
UTIG Seminar Series, Adam Sobel, Columbia University
Start:January 27, 2017 at 10:30 am
End:
January 27, 2017 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Understanding deep convection by parameterizing large-scale dynamics
Abstract:
Tight coupling between deep convection and larger-scale circulations in the atmosphere makes it difficult to understand the causal factors which control variations in precipitation on a range of space and time scales. One approach to untangling these factors involves simulating the convection in a small domain and parameterizing the large scale circulations which connect that domain to the rest of the atmosphere. The weak temperature gradient approximation is one such large-scale parameterization, based on well-understood aspects of geophysical fluid dynamics near the equator and thus appropriate for the study of tropical convection. I will review application of the weak temperature gradient approach to a range of specific observed phenomena in the tropics, including El Nino, the Madden-Julian oscillation, and tropical cyclones. I will then present a new large-scale parameterization appropriate outside the deep tropics, using the quasi-geostrophic omega equation. A motivation for this latter work is to understand the dynamics behind extreme precipitation events in the subtropics and midlatitudes, and I will show results from its application to the events leading to the 2010 floods in Pakistan.
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 |