Surface Melt-Induced Acceleration of Greenland Ice-Sheet Flow-Reference-Cited by-同舟云学术

Surface Melt-Induced Acceleration of Greenland Ice-Sheet Flow

Published:2002-07-12 Issue:5579 Volume:297 Page:218-222
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Zwally H. Jay¹,Abdalati Waleed²,Herring Tom³,Larson Kristine⁴,Saba Jack⁵,Steffen Konrad⁶

Affiliation:

1. Oceans and Ice Branch, Code 971, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

2. Code YS, NASA Headquarters, 300 E Street, SW, Washington, DC 20546, USA.

3. Department of Earth, Atmospheric, and Planetary Sciences, MIT Room 54-618, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.

4. Department of Aerospace Engineering Sciences, University of Colorado, Boulder, CO 80309, USA.

5. Raytheon Inc., Code 971, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

6. CIRES, University of Colorado, CB 216, Boulder, CO 80309, USA.

Abstract

Ice flow at a location in the equilibrium zone of the west-central Greenland Ice Sheet accelerates above the midwinter average rate during periods of summer melting. The near coincidence of the ice acceleration with the duration of surface melting, followed by deceleration after the melting ceases, indicates that glacial sliding is enhanced by rapid migration of surface meltwater to the ice-bedrock interface. Interannual variations in the ice acceleration are correlated with variations in the intensity of the surface melting, with larger increases accompanying higher amounts of summer melting. The indicated coupling between surface melting and ice-sheet flow provides a mechanism for rapid, large-scale, dynamic responses of ice sheets to climate warming.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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