Antarctica volume change from 10 years of Envisat altimetry

Before providing an accurate continental volume balance with altimetric series several problems must be addressed. ICESat suffers from low temporal sampling rate and a probable inter-campaign bias while Envisat radar altimeter cannot properly cover the steep coastal regions. We show that with the same data set, the discrepancies of the estimation of the volume change is several tens of cubic kilometers per years, depending of the method used to derive continental volume change from local measurements.