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Recent Ice Sheet and Glacier Elevation Changes in Greenland from Aircraft Laser AltimetryThe Arctic Ice Mapping group (Project AIM) at the NASA Goddard Space Flight Center Wallops Flight Facility has been conducting systematic topographic surveys of the Greenland Ice Sheet (GIS) since 1993, using scanning airborne laser altimeters combined with Global Positioning System (UPS) technology. Earlier surveys showed the ice sheet above 2000-rn elevation to be in balance, but with localized regions of thickening or thinning. Thinning predominates at lower elevations and thinning rates have recently increased, resulting in a negative mass balance for the entire ice sheet. Recently, critical segments of near-coastal flight lines in Greenland were resurveyed. Results from the new data will be presented.
Document ID
20080030107
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Krabill, William B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Thomas, R. (NASA Wallops Flight Center Wallops Island, VA, United States)
Sonntag, J. (NASA Wallops Flight Center Wallops Island, VA, United States)
Manizade, S. (NASA Wallops Flight Center Wallops Island, VA, United States)
Yungel, J. (NASA Wallops Flight Center Wallops Island, VA, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2008
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: International Glaciological Society Meeting
Location: Limerick
Country: Ireland
Start Date: August 17, 2008
End Date: August 22, 2008
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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