A reconciled estimate of ice-sheet mass balance

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 ag...

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Vydáno v:Science (American Association for the Advancement of Science) Ročník 338; číslo 6111; s. 1183
Hlavní autoři: Shepherd, Andrew, Ivins, Erik R, A, Geruo, Barletta, Valentina R, Bentley, Mike J, Bettadpur, Srinivas, Briggs, Kate H, Bromwich, David H, Forsberg, René, Galin, Natalia, Horwath, Martin, Jacobs, Stan, Joughin, Ian, King, Matt A, Lenaerts, Jan T M, Li, Jilu, Ligtenberg, Stefan R M, Luckman, Adrian, Luthcke, Scott B, McMillan, Malcolm, Meister, Rakia, Milne, Glenn, Mouginot, Jeremie, Muir, Alan, Nicolas, Julien P, Paden, John, Payne, Antony J, Pritchard, Hamish, Rignot, Eric, Rott, Helmut, Sørensen, Louise Sandberg, Scambos, Ted A, Scheuchl, Bernd, Schrama, Ernst J O, Smith, Ben, Sundal, Aud V, van Angelen, Jan H, van de Berg, Willem J, van den Broeke, Michiel R, Vaughan, David G, Velicogna, Isabella, Wahr, John, Whitehouse, Pippa L, Wingham, Duncan J, Yi, Donghui, Young, Duncan, Zwally, H Jay
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 30.11.2012
Témata:
Antarctic Regions
Climate Change
Geographic Information Systems
Greenland
Ice Cover
Antarctic Regions
Greenland
ISSN:1095-9203, 1095-9203
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Popis
Shrnutí: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.
Bibliografie:ObjectType-Article-1
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ISSN:1095-9203
1095-9203
DOI:10.1126/science.1228102