中文摘要：

利用2003-01-2013-12期间GRACE数据反演得到地球表面质量变化,使用全球正向建模恢复法改正泄露影响,获得南极冰盖质量变化。比较GRACE直接估计和泄露影响改正后的结果发现,南极冰盖在2003-2013年质量变化信号衰减20.3%,西南极有26.4%的质量消融信号泄露到了周边,东南极的泄露影响更高达70%。改正后的结果表明,南极冰盖绝大部分质量消融发生在西南极和南极半岛,质量积累发生在东南极的Ronne冰架和Amery冰架;西南极冰盖质量变化速度达到-152.47±2.00Gt/a,基本上等同于南极全岛的质量消融速度,而南极半岛的冰盖融化速度为-27.44±0.75Gt/a,基本与东南极的冰盖质量积累速度27.27±5.12Gt/a抵消;南极全岛冰川整体质量以-152.64±7.00Gt/a速度消失,并以-18.85±4.87Gt/a2的加速度加速融化,导致海平面以0.41mm/a的速度上升。

英文摘要：

In this paper, approximately 11 years of monthly GRACE measurements （from 2003-01 to 2013 12） are used to estimate the real glacier mass variations in Antarctica, after correction of the leakage errors, using global forward modeling. Compared with direct GRACE estimations, our re- sults, after correcting the leakage effect, show the 20.3% of the signals in whole Antarctic glacier mass changes are attenuated in GRACE inversion procedure. 26.4% signals of ice loss in west Antarc- tica are leaked into the surrounding region, while the leakage errors are up to 70% in east Antarctica. Therefore, the leakage errors should be removed in quantifying the mass loss of Antarctic glacier. The recovered Antarctic glacier mass variations show that most ice losses are in west Antarctica and the Antarctic peninsula, and glacier mass accumulation occurs at Ronne ice shelf and Amery Ronne ice shelf in east Antarctica. The mass loss is about 152.47±2.00 Gt/a in west Antarctica, which is near- ly equal to the total mass loss rate of Antarctica. The mass change rate of Antarctic peninsula is about 27.44±0.75 Gt/a, equaling the gaining mass with the rate of 27.27±5.12 Gt/a in east Antarctica, mostly in coastal regions. The total ice mass is being lost at a rate of -152. 64±7. 00 Gt/a, with ac- celeration of 18.85±4.87 Gt/a2 ,which will cause the sea level to rise atthe rate of 0.41 mm/a.