Rapid volume loss from two East Greenland outlet glaciers quantified using repeat stereo satellite imagery

被引:104
作者
Stearns, Leigh A. [1 ]
Hamilton, Gordon S. [1 ]
机构
[1] Univ Maine, Climate Change Inst, Orono, ME 04469 USA
关键词
D O I
10.1029/2006GL028982
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The coastal portions of Kangerdlugssuaq and Helheim glaciers in southeast Greenland lost at least 51 +/- 8 km(-3) yr(-1) of ice between 2001-2006 due to thinning and retreat, according to an analysis of sequential digital elevation models (DEMs) derived from stereo ASTER satellite imagery. The dominant contribution to this ice loss was dynamic thinning caused by the acceleration in flow of both glaciers. Peak rates of change, including thinning rates of similar to 90 m yr(-1), coincided with the rapid increases in flow speed. Extrapolation of the measured data to the ice divides yields an estimated combined catchment volume loss of similar to 122 +/- 30 km(-3) yr(-1), which accounts for half the total mass loss from the ice sheet reported in recent studies. These catchment-wide volume losses contributed similar to 0.31 +/- 0.07 mm yr(-1) to global sea level rise over the 5-year observation period with the coastal regions alone contributing at least 0.1 +/- 0.02 mm yr(-1).
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页数:5
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共 19 条
[1]   Outlet glacier and margin elevation changes: Near-coastal thinning of the Greenland ice sheet [J].
Abdalati, W ;
Krabill, W ;
Frederick, E ;
Manizade, S ;
Martin, C ;
Sonntag, J ;
Swift, R ;
Thomas, R ;
Wright, W ;
Yungel, J .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2001, 106 (D24) :33729-33741
[2]   Rapid wastage of Alaska glaciers and their contribution to rising sea level [J].
Arendt, AA ;
Echelmeyer, KA ;
Harrison, WD ;
Lingle, CS ;
Valentine, VB .
SCIENCE, 2002, 297 (5580) :382-386
[3]   A new ice thickness and bed data set for the Greenland ice sheet 1. Measurement, data reduction, and errors [J].
Bamber, JL ;
Layberry, RL ;
Gogineni, S .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2001, 106 (D24) :33773-33780
[4]   Recent rapid thinning of the "Mer de Glace'' glacier derived from satellite optical images -: art. no. L17401 [J].
Berthier, E ;
Arnaud, Y ;
Baratoux, D ;
Vincent, C ;
Rémy, F .
GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (17) :L174011-4
[5]   Satellite gravity measurements confirm accelerated melting of Greenland ice sheet [J].
Chen, J. L. ;
Wilson, C. R. ;
Tapley, B. D. .
SCIENCE, 2006, 313 (5795) :1958-1960
[6]   ASTER DEM performance [J].
Fujisada, H ;
Bailey, GB ;
Kelly, GG ;
Hara, S ;
Abrams, MJ .
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2005, 43 (12) :2707-2714
[7]   Rapid retreat and acceleration of Helheim Glacier, east Greenland [J].
Howat, IM ;
Joughin, I ;
Tulaczyk, S ;
Gogineni, S .
GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (22) :1-4
[8]   Greenland Ice Sheet: Increased coastal thinning [J].
Krabill, W ;
Hanna, E ;
Huybrechts, P ;
Abdalati, W ;
Cappelen, J ;
Csatho, B ;
Frederick, E ;
Manizade, S ;
Martin, C ;
Sonntag, J ;
Swift, R ;
Thomas, R ;
Yungel, J .
GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (24) :1-4
[9]   Rapid and synchronous ice-dynamic changes in East Greenland [J].
Luckman, A ;
Murray, T ;
de Lange, R ;
Hanna, E .
GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (03)
[10]   Recent Greenland ice mass loss by drainage system from satellite gravity observations [J].
Luthcke, S. B. ;
Zwally, H. J. ;
Abdalati, W. ;
Rowlands, D. D. ;
Ray, R. D. ;
Nerem, R. S. ;
Lemoine, F. G. ;
McCarthy, J. J. ;
Chinn, D. S. .
SCIENCE, 2006, 314 (5803) :1286-1289