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南极冰盖质量变化与全球海平面和气候变化紧密相关.本文使用了去相关滤波P3M6结合300kmFan滤波的组合滤波方案,利用2002年8月至2010年6月的GRACE(Gravity Recovery and Climate Explorer)时变重力场数据反演南极地区地表质量变化,扣除冰后回弹的影响和泄漏误差后获得了南极冰盖质量变化.结果表明:南极冰盖呈现加速消融趋势,冰盖质量消融速率为80.0Gt/a,对海平面上升的贡献为0.22mm/a,其中西南极地区冰盖质量消融速率为78.3Gt/a,东南极地区冰盖质量趋于平衡,年变化速率为1.6Gt/a;南极地区冰盖质量消融的平均变化率由2002～2005年的39.3Gt/a增大到2006～2010年的104.2Gt/a,其对海平面的影响由2002～2005年的0.11mm/a增大到2006～2010年的0.29mm/a,表明南极地区冰盖正处于加速消融阶段;2006～2008年东南极沿海岸区域Ender by Land和Wilkes Land冰盖质量积累速率减小,但2009年后其冰盖质量呈现较大幅度的增加.
The change of Antarctic ice sheet quality is closely related to the global sea level and climate change.In this paper, we use the combined filtering scheme of the decorrelation filter P3M6 and 300kmFan filter. When using GRACE (Gravity Recovery and Climate Explorer) from August 2002 to June 2010 Antarctic ice sheet quality changes were obtained by deducing the effects of springback and leakage errors after inversion of the data of gravity field in the Antarctic region.The results show that the Antarctic ice sheet shows an accelerated melting tendency and the ice mass mass ablation rate is 80.0Gt / a, the contribution to sea level rise is 0.22mm / a, of which the mass ablation rate of the western South Pole is 78.3Gt / a, the quality of the ice sheet in the East Antarctic tends to balance, and the annual rate of change is 1.6Gt / a; The average rate of change of ice mass mass ablation in the area increased from 39.3Gt / a in 2002 to 2005 to 104.2Gt / a in 2006 ~ 2010, and its influence on sea level increased from 0.11mm / a in 2002-2005 0.29mm / a from 2006 to 2010, indicating that the ice sheet in the Antarctic region is accelerating ablation; the mass accumulation rates of Ender by Land and Wilkes Land in the coastal areas of the Southeast Antarctica decreased from 2006 to 2008, but after 2009, The quality of the ice cap is more substantial Increase.