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 agreeme...

Full description

Bibliographic Details
Published in:Science
Main Authors: 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
Format: Article in Journal/Newspaper
Language:unknown
Published: 2012
Subjects:
Antarc*
Antarctic
Antarctic Peninsula
Antarctica
East Antarctica
Greenland
Ice Sheet
West Antarctica
Online Access:https://hdl.handle.net/1983/70d19bc2-6481-4a9a-bc7d-6521f230d691
https://research-information.bris.ac.uk/en/publications/70d19bc2-6481-4a9a-bc7d-6521f230d691
https://doi.org/10.1126/science.1228102
http://www.sciencemag.org/content/338/6111/1183.abstract
Description
Summary: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.

Similar Items