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Research Spending & Results

Award Detail

Awardee:UNIVERSITY OF TEXAS AT AUSTIN
Doing Business As Name:University of Texas at Austin
PD/PI:
  • Ginny A Catania
  • (512) 471-0403
  • gcatania@ig.utexas.edu
Co-PD(s)/co-PI(s):
  • Donald D Blankenship
Award Date:04/16/2008
Estimated Total Award Amount: $ 364,058
Funds Obligated to Date: $ 364,058
  • FY 2008=$27,642
  • FY 2009=$336,416
Start Date:06/01/2008
End Date:05/31/2013
Transaction Type:Grant
Agency:NSF
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.078
Primary Program Source:040100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica
Federal Award ID Number:0739654
DUNS ID:170230239
Parent DUNS ID:042000273
Program:ANT Glaciology

Awardee Location

Street:3925 W Braker Lane, Ste 3.340
City:Austin
State:TX
ZIP:78759-5316
County:Austin
Country:US
Awardee Cong. District:10

Primary Place of Performance

Organization Name:University of Texas at Austin
Street:3925 W Braker Lane, Ste 3.340
City:Austin
State:TX
ZIP:78759-5316
County:Austin
Country:US
Cong. District:10

Abstract at Time of Award

Catania 0739654 This award supports a project to study the Amundsen Sea drainage system and improve understanding of the impact of recent glaciological changes as an aid to predicting how this region will change in the future. The intellectual merit of the work is that the Amundsen Sea drainage system has been a recent focus for glaciological research because of rapid changes occurring there as a result of grounding line retreat. The work will focus on the regions of flow transition and will map the internal stratigraphy of the ice sheet across the Thwaites Glacier shear margins and use the age and geometry of radar-detected internal layers to interpret ice flow history. Thwaites Glacier (one of the main pathways for ice drainage in the region) has recently widened and may continue to do so in the near future. Thwaites Glacier may be particularly vulnerable to grounding line retreat because it lacks a well-defined subglacial channel. The subglacial environment exerts strong control on ice flow and flow history will be mapped in the context of bed topography and bed reflectivity. The plan is to use existing ice-penetrating radar data and coordinate with planned upcoming surveys to reduce logistical costs. The work proposed here will take three years to complete but no additional fieldwork in Antarctica is required. More detailed ground-based geophysical (radar and seismic) experiments will be needed at key locations to achieve our overall goal and the work proposed here will aid in identifying those regions. The broader impacts of the project are that it will initiate a new collaboration among radar communities within the US including those that are on the forefront of radar systems engineering and those that are actively involved in radar-derived internal layer and bed analysis. The project will also provide support for a postdoctoral researcher and a graduate student, thus giving them exposure to a variety of methodologies and scientific issues. Finally, there are plans to further develop the "Wired Antarctica" website designed by Ginny Catania with the help of a student-teacher. This will allow for the existing lesson plans to be updated to Texas State standards so that they can be used more broadly within state middle and high schools.

Publications Produced as a Result of this Research

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MacGregor, J.A. Catania, G.A. Conway, H. Schroeder, D.S. Joughin, I. Young, D.A. Kempf, S.D. Blankenship, D.D. "Weak bed control of the eastern shear margin of Thwaites Glacier" Journal of Glaciology, v.59, 2013, p.900. doi:10.3189/2013JoG11J050 

MacGregor, J.A. Catania, G.A. Markowski, M.S. Andrews, A.G. "Widespread rifting and retreat of ice-shelf margins in the eastern Amundsen Sea Embayment between 1972 and 2011" Journal of Glaciology, v.58, 2012, p.458. doi:10.3189/2012JoG11J262 

J.A. MacGregor, G. Catania, M. Markowski, A. Andrews "Widespread rifting and retreat of ice-shelf margins in the eastern Amundsen Sea Embayment between 1972 and 2011" Journal of Glaciology, v.58, 2012, p.458.

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