Regional acceleration in ice mass loss from Greenland and Antarctica using GRACE time-variable gravity data
Regional acceleration in ice mass loss from Greenland and Antarctica using GRACE time-variable gravity data
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DOI：
10.1002/2014gl061052
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发表时间：
2014-11-28
影响因子：
5.2
通讯作者：
van den Broeke, M. R.
中科院分区：
文献类型：
--
作者：
Velicogna, I.;Sutterley, T. C.;van den Broeke, M. R.
我们使用重力恢复和气候实验（GRACE）的月重力场，以确定在格陵兰岛和南极洲的冰质量损失的区域加速2003-2013。我们发现，总的质量损失是由几个区域控制。在格陵兰岛，东南部和西北部产生了70%的损失（28058 Gt/yr），主要来自冰动力学，西南部占总损失加速（25.41.2 Gt/yr（2））的54%，来自表面质量平衡（SMB）的减少，其次是西北部（34%），我们发现东北部没有明显的加速。在南极洲，阿蒙森海（AS）部门和南极半岛分别占64%和17%，总损失（18010 Gt/yr）主要来自冰动力。AS部门贡献了大部分的加速损失（114 Gt/yr（2）），东南极洲的毛德皇后地是唯一一个由于SMB（63 +/- 5 Gt/yr）的局部增加而显著增加的部门。
We use Gravity Recovery and Climate Experiment (GRACE) monthly gravity fields to determine the regional acceleration in ice mass loss in Greenland and Antarctica for 2003-2013. We find that the total mass loss is controlled by only a few regions. In Greenland, the southeast and northwest generate 70% of the loss (28058 Gt/yr) mostly from ice dynamics, the southwest accounts for 54% of the total acceleration in loss (25.41.2 Gt/yr(2)) from a decrease in surface mass balance (SMB), followed by the northwest (34%), and we find no significant acceleration in the northeast. In Antarctica, the Amundsen Sea (AS) sector and the Antarctic Peninsula account for 64% and 17%, respectively, of the total loss (18010 Gt/yr) mainly from ice dynamics. The AS sector contributes most of the acceleration in loss (114 Gt/yr(2)), and Queen Maud Land, East Antarctica, is the only sector with a significant mass gain due to a local increase in SMB (63 +/- 5 Gt/yr).