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标题：Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier
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作者：ETIENNE BERTHIER ; FANNY BRUN
期刊名称：Journal of Glaciology
印刷版ISSN：0022-1430
电子版ISSN：1727-5652
出版年度：2019
卷号：65
期号：251
页码：494-507
DOI：10.1017/jog.2019.32
出版社：Cambridge University Press
摘要：Karakoram glaciers experienced balanced or slightly positive mass budgets since at least the 1970s. Here, we provide an update on the state of balance of Central and Eastern Karakoram glaciers (12 000 km 2 ) between 2008 and 2016 by differencing DEMs derived from satellite optical images. The mass budget of Central Karakoram glaciers was slightly positive (0.12 ± 0.14 m w.e. a −1 ) while eastern Karakoram glaciers lost mass (−0.24 ± 0.12 m w.e. a −1 100 Mm 3 rock avalanche on Siachen Glacier ablation area in September 2010. It covered a 4 km 2 100 m deep 2 km 2 depression and contributed to 6% of the mass loss of Siachen Glacier from 2010 to 2016 (−0.39 m w.e. a −1 ). We hypothesize that sub- or englacial melt may be responsible for this intriguing behaviour. This study contributes to a better knowledge of the regional pattern of the Karakoram anomaly and of the influence of rock avalanches on glacier mass changes.
关键词：glacier mass balance;glacier surges;mountain glaciers;remote sensing