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采用CSR(Center for Space Research)公布的RL05版本的2002-07-2015-04近13年的GRACE卫星月重力数据,计算分析了南极冰盖质量变化趋势。通过比较300km的高斯平滑滤波、扇形滤波以及去条带扇形滤波算法对于去条带噪声的效果,确定去条带扇形滤波算法效果更好。分析对比了Geruo13、IJ05_R2、W12a这3种GIA模型对南极冰盖质量变化的影响,发现不同GIA模型计算的南极冰盖质量变化差异明显,尤其在坎普冰流、龙尼冰架和东南极等区域差别较大。本文分3个时间段反演计算了南极冰盖质量变化,结果显示,不同时间段质量变化存在很大差异,且南极冰盖质量变化呈现非常明显的地区不平衡性,主要体现在西南极、南极半岛、恩德比地、龙尼冰架和毛德皇后地等区域。
Based on the RL05 version released by Center for Space Research (CSR) for GRACE satellite monthly gravity data from 2002-07-2015-04 for the past 13 years, the change trend of Antarctic ice sheet quality was calculated and analyzed. By comparing Gaussian smoothing, fanning and de-banding fanning filtering of 300km, the de-striping fanning filtering algorithm is better than the traditional one. The influence of three GIA models, Geruo13, IJ05_R2 and W12a, on the quality change of the Antarctic ice sheet was analyzed and compared. The results showed that there were significant differences in the quality changes of Antarctic ice sheets calculated by different GIA models, especially in the Campo Ice, Lungi Ice Shelf and Southeast Antarctica Other regional differences. In this paper, the quality changes of Antarctic ice sheet are calculated and calculated in three time periods. The results show that there are great differences in mass changes in different time periods, and there is a very obvious regional imbalance in the quality change of the Antarctic ice sheet, which is mainly reflected in the southwest pole, Antarctic Peninsula, Entebbe, Ronnie Ice Shelf and Maw Queens.