North and Northeast Greenland Ice Discharge from Satellite Radar Interferometry
E. J. Rignot,
*
S. P. Gogineni,
W. B. Krabill,
S. Ekholm
Ice discharge from north and northeast Greenland calculated from
satellite radar interferometry data of 14 outlet glaciers is 3.5 times
that estimated from iceberg production. The satellite estimates,
obtained at the grounding line of the outlet glaciers, differ from
those obtained at the glacier front, because basal melting is extensive
at the underside of the floating glacier sections. The results suggest
that the north and northeast parts of the Greenland ice sheet may be
thinning and contributing positively to sea-level rise.
E. J. Rignot, Jet Propulsion Laboratory, California Institute of
Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA.
S. P. Gogineni, Radar Systems and Remote Sensing Laboratory, The
University of Kansas, 2291 Irving Hill Road, Lawrence, KS 66045-2969,
USA.
W. B. Krabill, NASA Goddard Space Flight Center, Wallops Flight
Facility, Laboratory for Hydrospheric Processes, Wallops Island, VA
23337, USA.
S. Ekholm, Kort and Matrikelstyrelsen, Geodetic Division,
Rentemestervej 8, DK-2400 Copenhagen NV, Denmark
*
To whom correspondence should be addressed. E-mail:
eric{at}adelie.jpl.nasa.gov
