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Record Search Query:
Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics
Entry ID: USAP-1143836

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Summary
Abstract:

This project will investigate the marine component of the Totten Glacier and Moscow University Ice Shelf, East Antarctica. This system is of critical importance because it drains one-eighth of the East Antarctic Ice Sheet and contains a volume equivalent to nearly 7 meters of potential sea level rise, greater than the entire West Antarctic Ice Sheet. This nearly completely unexplored region is ...


Independent, space-based platforms indicate accelerating mass loss of the Totten system. Recent aerogeophysical surveys of the Aurora Subglacial Basin, which contains the deepest ice in Antarctica and drains into the Totten system, have provided the subglacial context for measured surface changes and show that the Totten Glacier has been the most significant drainage pathway for at least two previous ice flow regimes. However, the offshore context is far less understood. Limited physical oceanographic data from the nearby shelf/slope break indicate the presence of Modified Circumpolar Deep Water within a thick bottom layer at the mouth of a trough with apparent access to Totten Glacier, suggesting the possibility of sub-glacial bottom inflow of relatively warm water, a process considered to be responsible for West Antarctic Ice Sheet grounding line retreat. This project will conduct a ship-based marine geologic and geophysical survey of the region, combined with a physical oceanographic study, in order to evaluate both the recent and longer-term behavior of the glacial system and its relationship to the adjacent oceanographic system. This endeavor will complement studies of other Antarctic ice shelves, oceanographic studies near the Antarctic Peninsula, and ongoing development of ice sheet and other ocean models.


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Description: NSF Award Abstract.
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Data Set Citation
Version: Not provided
Temporal Coverage
Start Date: 2012-09-01T00:00:00.000Z
Stop Date: 2017-08-31T23:59:59.999Z
ISO Topic Category
Data Set Progress
COMPLETE
Data Center
United States Antarctic Program Data Center
Data Center URL: http://www.usap-dc.org/

Data Center Personnel
Name: Data Manager
Email: info at usap-dc.org
Contact Address:
Lamont-Doherty Earth Observatory
61 Route 9W
City: Palisades
Province or State: NY
Postal Code: 10964
Country: USA
Personnel
Amy Leventer
Role: INVESTIGATOR
Email: aleventer at colgate.edu
Contact Address:
Colgate University
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 1970-01-01
Last DIF Revision Date: 2017-11-22