Collaborative Research: Anisotropy, Abrupt Climate Change, and the Deep Ice in West Antarctica
Entry ID: pettit_0940650

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Summary
Abstract: This award supports a project to constrain the accumulation rate, thickness, and temperature history for Siple Dome using a vertical velocity profile that includes the effects of an evolving fabric on deformation through time, to invert the depth-profile of fabric determined from sonic velocity measurements and grain size observed in thin sections in Siple Dome for the surface temperature and ... View entire text

Purpose: The intellectual merit of the work is that it will extract past climate information from a number of physical properties of the deep ice using a coupled fabric evolution and ice-sheet flow model. The focus will be on the deep ice-age ice at Siple Dome, where the ice-core record shows puzzling signals and where modeling results imply intriguing deformation patterns. The method will also be applied ... View entire text
Geographic Coverage
Spatial coordinates   
  N: -75.0   S: -85.0   E: -105.0   W: -165.0

Data Set Progress
IN WORK
Data Center
NSIDC Antarctic Glaciological Data Center Supplemental Info
Data Center URL: http://nsidc.org/agdc/

Data Center Personnel
Name: NSIDC AGDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
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Personnel
Role: INVESTIGATOR
Phone: (907) 474-5389
Email: pettit at gi.alaska.edu
Contact Address:
Department of Geology and Geophysics
University of Alaska Fairbanks
900 Yukon Dr. Rm 308
City: Fairbanks
Province or State: Alaska
Postal Code: 99775
Country: USA
Publications/References
Kennedy, J.H; Pettit, E.C. DiPrinzio, C. in review."The evolution of ice crystal fabric in ice sheets and its link to climate history" Journal of Glaciology.

Pettit, E; Waddington, E; Harrison, W; Thorsteinsson, T; Elsberg, D; Morack, J; and Zumberge, M. "The crossover stress, anisotropy, and the flow law at Siple Dome, West Antarctica," Journal of Glaciology, v.57(201), 2011, p. 39.
Creation and Review Dates
DIF Creation Date: 2012-09-04
Last DIF Revision Date: 2012-09-12
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