Revisiting Greenland ice sheet mass loss observed by GRACE

被引:74
作者
Schrama, Ernst J. O. [1 ]
Wouters, Bert [2 ]
机构
[1] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands
[2] Koninklijk Nederlands Meteorol Inst, NL-3732 GK De Bilt, Netherlands
关键词
D O I
10.1029/2009JB006847
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
In this paper we discuss a new method for determining mass time series for 16 hydrological basins representing the Greenland system (GS) whereby we rely on Gravity Recovery and Climate Experiment (GRACE) mission data. In the same analysis we also considered observed mass changes over Ellesmere Island, Baffin Island, Iceland, and Svalbard (EBIS). The summed contribution of the complete system yields a mass loss rate and acceleration of -252 +/- 28 Gt/yr and -22 +/- 4 Gt/yr(2) between March 2003 and February 2010 where the error margins follow from two glacial isostatic adjustment (GIA) models and three processing centers providing GRACE monthly potential coefficient sets. We describe the relation between mass losses in the GS and the EBIS region and found that the uncertainties in all areas are correlated. The summed contribution of Ellesmere Island, Baffin Island, Iceland, and Svalbard yields a mass loss rate of -51 +/- 17 Gt/yr and an acceleration of -13 +/- 3 Gt/yr(2) between March 2003 and February 2010. The new regional basin reconstruction method shows that the mass loss within the southeastern basins in the GS has slowed down since 2007, while mass loss in western basins increased showing a progression to the north of Greenland.
引用
收藏
页数:10
相关论文
共 23 条
[1]   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
[2]   Higher surface mass balance of the Greenland ice sheet revealed by high-resolution climate modeling [J].
Ettema, Janneke ;
van den Broeke, Michiel R. ;
van Meijgaard, Erik ;
van de Berg, Willem Jan ;
Bamber, Jonathan L. ;
Box, Jason E. ;
Bales, Roger C. .
GEOPHYSICAL RESEARCH LETTERS, 2009, 36
[3]   Elevation changes in Antarctica mainly determined by accumulation variability [J].
Helsen, Michiel M. ;
van den Broeke, Michiel R. ;
van de Wal, Roderik S. W. ;
van de Berg, Willem Jan ;
van Meijgaard, Erik ;
Davis, Curt H. ;
Li, Yonghong ;
Goodwin, Ian .
SCIENCE, 2008, 320 (5883) :1626-1629
[4]   Deriving daily snapshots of the Earth's gravity field from GRACE L1B data using Kalman filtering [J].
Kurtenbach, Enrico ;
Mayer-Guerr, Torsten ;
Eicker, Annette .
GEOPHYSICAL RESEARCH LETTERS, 2009, 36
[5]   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
[6]  
Luthcke S.B., 2010, EGU C VIENN AUSTR
[7]  
Mayer-Gurr T., 2006, THESIS U BONN BONN
[8]  
Paulson A, 2007, GEOPHYS J INT, V171, P497, DOI 10.1111/J.1365-246X.2007.03556.X
[9]   Global glacial isostasy and the surface of the ice-age earth: The ice-5G (VM2) model and grace [J].
Peltier, WR .
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, 2004, 32 :111-149
[10]   Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets [J].
Pritchard, Hamish D. ;
Arthern, Robert J. ;
Vaughan, David G. ;
Edwards, Laura A. .
NATURE, 2009, 461 (7266) :971-975