Events

JSG Happenings

Events

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UTIG Brown Bag: Mark Cloos, UT

April, 23 2019

Time: 12:00 PM - 1:00 PM
Location: PRC ROC Room 1.603

Informal weekly presentations by UTIG students and researchers. Bring your lunch!

Speaker: Mark Cloos, Professor, Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin

DeFord Lecture: Freya George

April, 25 2019

Time: 4:00 PM - 5:00 PM
Location: JGB 2.324

UTIG Seminar Series: Jamin Greenbaum, UTIG

April, 26 2019

Time: 10:30 AM - 12:00 PM
Location: PRC ROC Room 1.603

Click to watch online.

Speaker: Jamin Greenbaum, UTIG

Host: Don Blankenship

Title: Vulnerabilities to ice sheet retreat along East Antarctica’s Indo-Pacific margin

Abstract: Global average sea level was 6.6 to 9.4 meters higher than it is now during the last interglacial period, to which Antarctica must have contributed between 3.6 and 6.4 meters given the estimated contributions from other sources. Much attention has been given to the West Antarctic Ice Sheet (WAIS) due to the rapidly retreating Thwaites and Pine Island Glaciers; however, their combined maximum sea level contribution is limited to 83 cm and the maximum possible contribution of the WAIS, assuming a complete collapse, is limited to 3.3 meters. This sea level budgeting exercise, combined with satellite observations of coastal glacier thinning on the margin of the East Antarctic Ice Sheet (EAIS), motivated UTIG’s polar geophysics group to organize the International Collaborative Exploration of the Cryosphere through Airborne Profiling (ICECAP) consortium, resulting in what has become a decade-long campaign of interdisciplinary surveys that have now filled in every major data gap in the EAIS. Here I will highlight how our recent efforts in Princess Elizabeth Land (PEL) have revealed lithosphere that thinned due to Cretaceous breakup of Gondwana, resulting in a large area of the ice sheet grounded below sea level and vulnerable to climate-paced marine ice sheet instability. We show that the area of thinned lithosphere along coastal PEL is similar in extent to thin lithosphere in the conjugate area of India’s Bengal Basin –a region currently vulnerable to seawater inundation. I will conclude with an overview of ongoing efforts to characterize ice shelves and the seafloor along the Indo-Pacific margin, now the least understood area of Antarctica due to the presence of sea ice that complicates access by marine platforms.

UTIG Brown Bag: Cornelia Rasmussen, UTIG

April, 30 2019

Time: 12:00 PM - 1:00 PM
Location: PRC ROC Room 1.603

Informal weekly presentations by UTIG students and researchers. Bring your lunch!

Speaker: Cornelia Rasmussen, Postdoctoral Fellow, UTIG

DeFord Lecture: Peter Clift

May, 02 2019

Time: 4:00 PM - 5:00 PM
Location: JGB 2.324

UTIG Seminar Series: Natalya Gomez, McGill University

May, 03 2019

Time: 10:30 AM - 12:00 PM
Location: PRC ROC Room 1.603

Click to watch online.

Speaker: Natalya Gomez, McGill University

Host: Ginny Catania

Title: Ice, Sea Level and the Solid Earth in Antarctica

Abstract: Marine sectors of the Antarctic Ice Sheet are prone to unstable retreat in a warming climate. Observation and modeling-based studies suggest that these sectors have collapsed in the past and have the potential to contribute significantly to sea-level change in coming centuries, but the extent and timing of collapse remains uncertain. Constraining ice cover changes in Antarctica is challenging because the solid Earth, water and ice systems are strongly linked, and modern measurements of these systems contain a large signal from glacial isostatic adjustment (GIA) due to past ice mass changes. Furthermore, Earth structure beneath the Antarctic Ice Sheet is characterized by significant lateral variability. This talk will focus on the physics of sea-level changes, glacial isostatic adjustment and solid Earth deformation following variations in the distribution of ice and water on the Earth’s surface, and the implications of these changes on the past and future stability and dynamics of the Antarctic Ice Sheet.

Master\'s Saturday

May, 04 2019

Time: 8:00 AM - 2:00 PM
Location: JGB 2.324

Brown Bag: Sophie Goliber, UTIG

May, 07 2019

Time: 12:00 PM - 1:00 PM
Location: PRC ROC Room 1.603

Informal weekly presentations by UTIG students and researchers. Bring your lunch!

Speaker: Sophie Goliber, Graduate Research Assistant, UTIG

De Ford Lecture Series: Greta Wells

May, 09 2019

Time: 4:00 PM - 5:00 PM
Location: JGB 2.324