ON ICE SHEET HEIGHT CHANGES OVER ANTARCTIC FROM ALTIMETRY DATA
Chu Yonghai 1,2) ; Li Jiancheng 1,2) ; Zhao Xiangfang 3) ; Ma Jing 4) ; Jin Taoyong 1) ; and Xing Lelin 1,5)
1) School of Geodesy and Geomatics, Wuhan University, Wuhan 4300792) Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 4300793) Quality Supervision and Inspection Department of Product of Surveying and Mapping, Liaoning Province, Shenyang 1100154) Hubei Water Resources Technical College, Wuhan 4300705) Institute of Seismology, CEA, Wuhan 430071
Abstract The mean ENVISATDEM of 3 years over Antarctic ice sheet is derived from ENVISAT altimeter data applied relocation and geophysical correction. The mean height difference between ENVISATDEM and RAMP-DEM is about 18m, it means that their accuracies are close to each other. Moreover, the height changes of several profiles over Antarctic ice sheet between 2003 and 2006 are also analyzed, the results show that the height changes are in a range of -0.31-0.17 m.
