Physics – Geophysics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110401r&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 10, CiteID L10401
Physics
Geophysics
20
Exploration Geophysics: Remote Sensing, Hydrology: Glaciology (1863), Oceanography: Physical: Sea Level Variations, Radio Science: Interferometry, Radio Science: Remote Sensing
Scientific paper
Interferometric synthetic-aperture radar (InSAR) observations of southeast Greenland glaciers acquired by the Earth Remote Sensing Satellites (ERS-1/2) in 1996 were combined with ice sounding radar data collected in the late 1990s to estimate a total discharge of 46 +/- 3 km3 ice per year between 62°N and 66°N, which is significantly lower than a mass input of 29 +/- 3 km3 ice per year calculated from a recent compilation of snow accumulation data. Further north, Helheim Glacier discharges 23 +/- 1 km3/yr vs 30 +/- 3 km3/yr accumulation; Kangerdlugssuaq Glacier discharges 29 +/- 2 km3/yr vs 23 +/- 2 km3/yr; and Daugaard-Jensen Glacier discharges 10.5 +/- 0.6 km3/yr vs 10.5 +/- 1 km3/yr. The mass balance of east Greenland glaciers is therefore dominated by the negative mass balance of southeast Greenland glaciers (-17 +/- 4 km3/yr), equivalent to a sea level rise of 0.04 +/- 0.01 mm/yr. Warmer and drier conditions cannot explain the imbalance which we attribute to long-term changes in ice dynamics.
Braaten D.
Gogineni Prasad S.
Krabill William B.
McConnell Joseph R.
Rignot Eric
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