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MASS LOSS OF GREENLAND FROM GRACE, ICESAT AND CRYOSAT

机译:来自Grace,Icesat和Cryosat的格陵兰大众损失

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CryoSat data over the Greenland Ice Sheet are used to continue elevation height change data over the Greenland ice sheet, following a decade of detailed monitoring of ice sheet changes with GRACE and IceSat. The combination and validation of the different data for measuring changes is quantified by using available airborne lidar data from IceBridge and CryoVEx. There is a special challenge of using CryoSat as fill-in between EnviSat and Sentinel-3 for the longterm measurements of surface elevation changes, a key essential climate variable in the ESA Climate Change Initiative. Another challenge is the joint utilization of both altimetry and gravity field change measurements for consistent estimates of regional change patterns. In the paper we analyze GRACE, IceSat and CryoSat data since 2003, and present consistent estimates of overall mass changes with average values around -220 GT/year, showing large variations from year to year, with 2012 being another record melt year for the Greenland ice sheet. Sources of the changes are mainly melt of the marginal ice zones in SE and NW Greenland, as well as changes in the major outlet glaciers.
机译:在Grace和Icesat的详细监测十年之下,格陵兰冰板上的低温数据用于继续格陵兰冰板上的高度改变数据。通过使用来自IneBridge和Cryovex的可用空气传播的LIDAR数据来量化用于测量变化的不同数据的组合和验证。在Envisat和Sentinel-3之间使用CryoSat作为填充物的填充,对于Leave Expation的Longterm测量,在ESA气候变化倡议中的关键基本气候变量,存在特别挑战。另一个挑战是,用于区域变化模式的一致估计,Altimetry和重力场的联合利用率进行了变化测量。在论文中,我们自2003年以来分析了恩典,ICESAT和低温数据,并呈现出总体质量变化的一致估计,平均值为-220 GT /年,显示年度到年份的大变化,2012年是格陵兰岛的另一个记录融化年冰盖。这些变化的来源主要是SE和NW格陵兰的边缘冰区的融化,以及主要出口冰川的变化。

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