中文摘要：

利用NSIDC公布的ICESat运行期间的19个任务期的观测数据,采用重复轨迹分析方法估计近年来南极冰盖高程的时空变化。结果表明,南极大陆冰盖整体上呈现消融趋势,基于不同的GIA模型和ICESat激光测高数据的南极大陆冰盖高程变化的趋势约为-1.17~-1cm/a。

英文摘要：

We estimate the temporal and spatial variation of Antarctic ice sheet elevation using repeat track analysis based on all of the ICESat operational periods （19 campaigns）, the results show that the elevation of the ice sheet decreased for the past years. Due to the influence of the GIA, We analysis the contribution of three different GIA model and find the average height rates derived from the ICE- Sat campaigns is about -1.17- -1 cm/a based on the three different GIA models.