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DOI	10.1007/s11430-021-9844-0
	The joint driving effects of climate and weather changes caused the Chamoli glacier-rock avalanche in the high altitudes of the India Himalaya
	Zhou, Yushan; Li, Xin; Zheng, Donghai; Li, Zhiwei; An, Baosheng; Wang, Yingzheng; Jiang, Decai; Su, Jianbin; Cao, Bin
通讯作者	Li, X ; Zheng, DH (通讯作者)，Chinese Acad Sci, Natl Tibetan Plateau Data Ctr, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst & Resour, Beijing 100101, Peoples R China.
发表日期	2021
ISSN	1674-7313
EISSN	1869-1897
起始页码	1909
结束页码	1921
卷号	64 期号:11
英文摘要	Ice avalanches are one of the most devastating mountain hazards, and can pose a great risk to the security of the surrounding area. Although ice avalanches have been widely observed in mountainous regions around the world, only a few ice avalanche events have been studied comprehensively, due to the lack of available data. In this study, in response to the recent catastrophic rock-ice avalanche (7 February 2021) at Chamoli in the India Himalaya, we used high-resolution satellite images and found that this event was actually a glacier-rock landslide, where the collapse of the rock-ice body was caused by the sliding of the bedrock beneath the glacier, for which the source area and volume loss were about 2.89x10(5) m(2) and 2.46x10(7) m(3), respectively, corresponding to an average elevation change of about -85 m. Furthermore, visual analysis of the dense time-series satellite images shows that the overall downward sliding of the collapsed rock-ice body initiated around the summer of 2017, and thereafter exhibited clear seasonality (mainly in summer). Meteorological analysis reveals a strong rainfall anomaly in the initiation period of the sliding and a remarkable winter warming anomaly in the 40 days before the collapse. Comparisons of multi-temporal digital elevation models (DEMs) further suggest that the glacier geometry in the collapsed areas was likely changing (i.e., accelerated surface thinning in the lower part of the glaciers and insignificant change in the upper part), which is consistent with the region-wide climate warming. Finally, by combining the above findings and a geomorphic analysis, we conclude that the rock-ice avalanche event was mainly caused by the joint effects of climate and weather changes acting on a steeply sloping and fracture-prone geological condition. The findings of this study provide new and valuable evidence for the study of slope/glacier instability at high altitudes. This study also highlights that, for the Himalaya and other high mountain ranges, there is an urgent need to identify the glaciers that have a high risk of ice avalanches.
关键词	ICE AVALANCHES MASS-BALANCE SLOPE FAILURES PERMAFROST MOUNTAINS TIBET KH-9 DETACHMENTS MECHANISMS COLLAPSE
英文关键词	Rock-ice avalanche; Himalaya; Mountain hazards; Climate change; Remote sensing
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000707954300001
来源期刊	SCIENCE CHINA-EARTH SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254925
作者单位	[Zhou, Yushan; Li, Xin; Zheng, Donghai; An, Baosheng; Su, Jianbin; Cao, Bin] Chinese Acad Sci, Natl Tibetan Plateau Data Ctr, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst & Resour, Beijing 100101, Peoples R China; [Li, Zhiwei] Cent South Univ, Sch Geosci & Info Phys, Changsha 410083, Peoples R China; [Wang, Yingzheng] Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China; [Jiang, Decai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Jiang, Decai] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Yushan,Li, Xin,Zheng, Donghai,et al. The joint driving effects of climate and weather changes caused the Chamoli glacier-rock avalanche in the high altitudes of the India Himalaya[J]. 中国科学院西北生态环境资源研究院,2021,64(11).
APA	Zhou, Yushan.,Li, Xin.,Zheng, Donghai.,Li, Zhiwei.,An, Baosheng.,...&Cao, Bin.(2021).The joint driving effects of climate and weather changes caused the Chamoli glacier-rock avalanche in the high altitudes of the India Himalaya.SCIENCE CHINA-EARTH SCIENCES,64(11).
MLA	Zhou, Yushan,et al."The joint driving effects of climate and weather changes caused the Chamoli glacier-rock avalanche in the high altitudes of the India Himalaya".SCIENCE CHINA-EARTH SCIENCES 64.11(2021).