Rapid ice discharge from southeast Greenland glaciers

Research

Publication Type:

Journal Article

Source:

Geophysical Research LettersGeophysical Research LettersGeophysical Research Letters, Volume 31, Number 10, p.4 (2004)

ISBN:

0094-8276

Keywords:

FLOW, PARTS, RADAR INTERFEROMETRY, SHEET

Abstract:

<p><br/>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 km 3 ice per year between 62degreesN and 66degreesN, which is significantly lower than a mass input of 29 +/- 3 km 3 ice per year calculated from a recent compilation of snow accumulation data. Further north, Helheim Glacier discharges 23 +/- 1 km(3)/yr vs 30 +/- 3 km(3)/yr accumulation; Kangerdlugssuaq Glacier discharges 29 +/- 2 km(3)/yr vs 23 +/- 2 km(3)/yr; and Daugaard-Jensen Glacier discharges 10.5 +/- 0.6 km(3)/yr vs 10.5 +/- 1 km(3)/yr. The mass balance of east Greenland glaciers is therefore dominated by the negative mass balance of southeast Greenland glaciers (-17 +/- 4 km(3)/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.</p><br/>

Notes:

<p><br/>ISI Document Delivery No.: 827OJTimes Cited: 23Cited Reference Count: 19Cited References: ABDALATI W, 2001, J GEOPHYS RES-ATMOS, V106, P33729 BAMBER JL, 2001, J GEOPHYS RES-SOL EA, V106, P6733 BOX JE, 2002, INT J CLIMATOL, V22, P1829, DOI 10.1002/joc.852 GOGINENI S, 2001, J GEOPHYS RES-ATMOS, V106, P33761 KRABILL W, 1999, SCIENCE, V283, P1522 MCCONNELL JR, 2003, EOS T AGU S, V84 MEIER MF, 1987, J GEOPHYS RES-SOLID, V92, P9051 MICHEL R, 1999, J GLACIOL, V45, P93 MOTYKA RJ, 2003, ANN GLACIOL, V36, P57 OHMURA A, 1991, J GLACIOL, V37, P140 OHMURA A, 1999, Z GLETSCHERKD GLAZIA, V35, P1 OLESEN O, 1973, 58 GRONL GEOL UND, P49 OLESEN OB, 1969, GRONLANDS GEOLOGISKE, V21, P41 REEH N, 1985, GLACIERS ICE SHEETS, P155 REEH N, 1999, GEOPHYS RES LETT, V26, P1039 RIGNOT E, 2001, J GEOPHYS RES-ATMOS, V106, P34007 THOMAS R, 2001, J GEOPHYS RES-ATMOS, V106, P33707 WEIDICK A, 1995, US GEOL SURV PROF C, V1386, C1 ZWALLY HJ, 2002, SCIENCE, V297, P218AMER GEOPHYSICAL UNION</p><br/>