Shepherd, Andrew3; Ivins, Erik R3; A, Geruo3; Barletta, Valentina Roberta1; Bentley, Mike J3; Bettadpur, Srinivas3; Briggs, Kate H3; Bromwich, David H3; Forsberg, René1; Galin, Natalia3; Horwath, Martin3; Jacobs, Stan3; Joughin, Ian3; King, Matt A3; Lenaerts, Jan T M3; Li, Jilu3; Ligtenberg, Stefan R M3; Luckman, Adrian3; Luthcke, Scott B3; McMillan, Malcolm3; Meister, Rakia3; Milne, Glenn3; Mouginot, Jeremie3; Muir, Alan3; Nicolas, Julien P3; Paden, John3; Payne, Antony J3; Pritchard, Hamish3; Rignot, Eric3; Rott, Helmut3; Sørensen, Louise Sandberg1; Scambos, Ted A3; Scheuchl, Bernd3; Schrama, Ernst J O3; Smith, Ben3; Sundal, Aud V3; van Angelen, Jan H3; van de Berg, Willem J3; van den Broeke, Michiel R3; Vaughan, David3; Velicogna, Isabella3; Wahr, John3; Whitehouse, Pippa L3; Wingham, Duncan J3; Yi, Donghui3; Young, Duncan3; Zwally, H Jay3
1 National Space Institute, Technical University of Denmark2 Geodynamics, National Space Institute, Technical University of Denmark3 unknown
We combined an ensemble of satellite altimetry, interferometry, and gravimetry data sets using common geographical regions, time intervals, and models of surface mass balance and glacial isostatic adjustment to estimate the mass balance of Earth's polar ice sheets. We find that there is good agreement between different satellite methods--especially in Greenland and West Antarctica--and that combining satellite data sets leads to greater certainty. Between 1992 and 2011, the ice sheets of Greenland, East Antarctica, West Antarctica, and the Antarctic Peninsula changed in mass by -142 ± 49, +14 ± 43, -65 ± 26, and -20 ± 14 gigatonnes year(-1), respectively. Since 1992, the polar ice sheets have contributed, on average, 0.59 ± 0.20 millimeter year(-1) to the rate of global sea-level rise.