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

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
Data Center
NSIDC Antarctic Glaciological Data Center Supplemental Info
Data Center URL:

Data Center Personnel
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
View entire list
Phone: (907) 474-5389
Email: pettit at
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
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.
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2012-09-04
Last DIF Revision Date: 2017-08-23