Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
Proc Natl Acad Sci U S A. 2012 Dec 4;109(49):19934-7. doi: 10.1073/pnas.1206785109. Epub 2012 Nov 19.
The melting of polar ice sheets is a major contributor to global sea-level rise. Early estimates of the mass lost from the Greenland ice cap, based on satellite gravity data collected by the Gravity Recovery and Climate Experiment, have widely varied. Although the continentally and decadally averaged estimated trends have now more or less converged, to this date, there has been little clarity on the detailed spatial distribution of Greenland's mass loss and how the geographical pattern has varied on relatively shorter time scales. Here, we present a spatially and temporally resolved estimation of the ice mass change over Greenland between April of 2002 and August of 2011. Although the total mass loss trend has remained linear, actively changing areas of mass loss were concentrated on the southeastern and northwestern coasts, with ice mass in the center of Greenland steadily increasing over the decade.
极地冰盖的融化是导致全球海平面上升的主要因素之一。基于“重力恢复与气候实验”卫星收集的重力数据，对格陵兰冰盖质量损失的早期估计值差异很大。尽管目前大陆和十年平均的估计趋势已经基本趋同，但直到今天，对于格陵兰岛质量损失的详细空间分布以及在相对较短的时间尺度上地理模式的变化情况，仍然缺乏清晰的认识。在这里，我们提出了 2002 年 4 月至 2011 年 8 月期间格陵兰岛冰量变化的时空分辨率估计。尽管总质量损失趋势保持线性，但质量损失的活跃区域集中在东南和西北海岸，格陵兰岛中心的冰量在这十年中稳步增加。
