论文部分内容阅读
采用CSR(Center for Space Research)公布的RL05版本的2002年7月至2015年4月近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这三种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。本文分三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 GRACE satellite monthly gravity data of RL05 from July 2002 to April 2015 released by Center for Space Research (CSR), 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 effects of three GIA models, Geruo13, IJ05_R2 and W12a, on the quality change of the Antarctic ice sheet were analyzed and compared. The results showed that there were significant differences in the quality changes of the Antarctic ice sheet calculated by different GIA models, especially in the Campo Ice, Longini Ice Shelf and Southeast Antarctica Other regional differences. In this paper, the quality change of Antarctic ice sheet has been calculated by inversion in three time periods. The results show that there are great differences in the quality changes in different time periods, and the ice quality of the Antarctic ice sheet presents a very obvious regional imbalance, which is mainly reflected in the southwest pole, Antarctic Peninsula, Entebbe, Ronnie Ice Shelf and Maw Queens.