Evaluation of glacier changes in high‐mountain Asia based on 10 year GRACE RL05 models
Evaluation of glacier changes in high‐mountain Asia based on 10 year GRACE RL05 models
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DOI：
10.1002/2013jb010860
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发表时间：
2013-12
影响因子：
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通讯作者：
S. Yi;Wenke Sun
中科院分区：
文献类型：
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作者：
S. Yi;Wenke Sun
本文利用重力恢复与气候实验Release 05的10年时变重力资料，采用一种新的计算方案，即：空间域反演方法我们发现，在HMA地区，有三种不同的信号源，应该一起处理。两个普遍接受的来源，冰川融化和印度地下水枯竭，估计分别以−35.0 ± 5.8 Gt/yr（0.09 mm/yr海平面上升）和−30.6 ± 5.0 Gt/yr的速度变化。第三个来源是青藏高原内部显著的正信号（+30 Gt/yr），这很难解释。此外，我们还发现帕米尔和喀喇昆仑存在着5年的波动，这可以解释以往对这里冰川融化速率研究的争议。这5年信号可以用北极涛动和厄尔尼诺-南方涛动的影响来解释。
In this paper, 10 years of time-variable gravity data from the Gravity Recovery and Climate Experiment Release 05 have been used to evaluate the glacier melting rate in high-mountain Asia (HMA) using a new computing scheme, i.e., the Space Domain Inverse method. We find that in HMA area, there are three different kinds of signal sources that should be treated together. The two generally accepted sources, glacier melting and India underground water depletion, are estimated to change at the rate of −35.0 ± 5.8 Gt/yr (0.09 mm/yr sea level rising) and −30.6 ± 5.0 Gt/yr, respectively. The third source is the remarkable positive signal (+30 Gt/yr) in the inner Tibetan Plateau, which is challenging to explain. Further, we have found that there is a 5 year undulation in Pamir and Karakoram, which can explain the controversies of the previous studies on the glacier melting rate here. This 5 year signal can be explained by the influence of Arctic Oscillation and El Nino–Southern Oscillation.