Greenland mass balance estimation from satellite gravity measurements

The Gravity Recovery and Climate Experiment (GRACE) data is used to estimate the secular trend and periodic variations of ice mass variability over Greenland. To do this, we use 92 monthly GRACE level 2 Release-04 (RL04) data from the Center for Space Research at the University of Texas (UTCSR) during the period April 2002 to February 2010. The high frequency noise of data has been filtered out with three smoothing cap radius. For separation of leakage effects, the appropriate reduction model is used. Taking the average over all smoothing radius after the leakage effects correction, the annual ice-mass loss becomes -155±3 Gt/year. Note that these values are free of any GIA correction