TY - JOUR
T1 - A Reconciled Estimate of Ice-Sheet Mass Balance
AU - Shepherd, A.
AU - Lenaerts, J.T.M.
AU - Ligtenberg, S.R.M.
AU - van Angelen, J.H.
AU - van de Berg, W.J.
AU - van den Broeke, M.R.
AU - Zwally, H.J.
N1 - 47 auteurs in totaal
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
U2 - 10.1126/science.1228102
DO - 10.1126/science.1228102
M3 - Article
SN - 0036-8075
VL - 338
SP - 1183
EP - 1189
JO - Science
JF - Science
M1 - 6111
ER -