气候变化领域集成服务门户(CCPortal): Response of downstream lakes to Aru glacier collapses on the western Tibetan Plateau

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DOI	10.5194/tc-15-199-2021
	Response of downstream lakes to Aru glacier collapses on the western Tibetan Plateau
	Lei Y.; Yao T.; Tian L.; Sheng Y.; Lazhu; Liao J.; Zhao H.; Yang W.; Yang K.; Berthier E.; Brun F.; Gao Y.; Zhu M.; Wu G.
发表日期	2021
ISSN	19940416
起始页码	199
结束页码	214
卷号	15 期号:1
英文摘要	The lower parts of two glaciers in the Aru range on the western Tibetan Plateau (TP) collapsed on 17 July and 21 September 2016, respectively, causing fatal damage to local people and their livestock. The giant ice avalanches, with a total volume of 150 classCombining double low lineinline-formula× 10 classCombining double low lineinline-formula6 m classCombining double low lineinline-formula3, had almost melted by September 2019 (about 30 % of the second ice avalanche remained). The impact of these extreme disasters on downstream lakes has not been investigated yet. Based on in situ observation, bathymetry survey and satellite data, we explore the impact of the ice avalanches on the two downstream lakes (i.e., Aru Co and Memar Co) in terms of lake morphology, water level and water temperature in the subsequent 4 years (2016-2019). After the first glacier collapse, the ice avalanche slid into Aru Co along with a large amount of debris, which generated great impact waves in Aru Co and significantly modified the lake's shoreline and underwater topography. An ice volume of at least 7.1 classCombining double low lineinline-formula× 10 classCombining double low lineinline-formula6 m classCombining double low lineinline-formula3 was discharged into Aru Co, spread over the lake surface and considerably lowered its surface temperature by 2-4 classCombining double low lineinline-formulag C in the first 2 weeks after the first glacier collapse. Due to the large amount of meltwater input, Memar Co exhibited more rapid expansion after the glacier collapses (2016-2019) than before (2003-2014), in particular during the warm season. The melting of ice avalanches was found to contribute to about 23 % of the increase in lake storage between 2016 and 2019. Our results indicate that the Aru glacier collapses had both short-term and long-term impacts on the downstream lakes and provide a baseline in understanding the future lake response to glacier melting on the TP under a warming climate. © 2021 The Author(s). Published by Cambridge University Press.
英文关键词	avalanche; bathymetric survey; damage; glacial lake; glacier dynamics; ice flow; natural hazard; numerical model; satellite data; topographic effect; Aru Basin; China; Qinghai-Xizang Plateau; Xizang
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202361
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Cas Center for Excellence in Tibetan Plateau Earth System Sciences, Beijing, 100101, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming, China; Department of Geography, University of California, Los Angeles (UCLA), Los Angeles, CA 90095-1524, United States; National Tibetan Plateau Data Center, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China; Department of Earth System Science, Tsinghua University, Beijing, 10084, China; Legos, Cnes, Cnrs, Ird, Ups, Université de Toulouse, Toulouse, France; Université Grenoble Alpes, Cnrs, Ird, Grenoble Inp, Ige, Grenoble, 38000, France; Ngari Station for Desert Environment Observation and Res...
推荐引用方式 GB/T 7714	Lei Y.,Yao T.,Tian L.,et al. Response of downstream lakes to Aru glacier collapses on the western Tibetan Plateau[J],2021,15(1).
APA	Lei Y..,Yao T..,Tian L..,Sheng Y..,Lazhu.,...&Wu G..(2021).Response of downstream lakes to Aru glacier collapses on the western Tibetan Plateau.Cryosphere,15(1).
MLA	Lei Y.,et al."Response of downstream lakes to Aru glacier collapses on the western Tibetan Plateau".Cryosphere 15.1(2021).