2003-2008 Ice Sheet Elevation Change on the Lake Vostok, Antarctica, From ICESat

This paper estimate the recently trend of ice sheet elevation change in the Lake Vostok region of the east Antarctica using the time series of the ground track crossover from the ICESat (ice cloud and land elevation satellite) laser altimetry, and adopt several methods to improve the processing of the crossover elevation change time series, utilize the more crossover points from the whole ICESat laser operation periods dataset. The elevation change rate we got is -1.36 plusmn 0.09 cm per year from 2003 to 2008 in the Lake Vostok region. The result shows we can get an accuracy cm-level elevation change rate in the flat interior region of the Antarctica, which provided a useful approach to detect the whole polar ice sheet mass balance.