Stability of the Hailuogou glacier during the "9.5" Luding Earthquake: a preliminary assessment based on multi-source observations
文献类型:期刊论文
作者 | Liu Qiaol4; Zhang Bo4; Zhao Bo4; Zhong Yan3; Lu Xue-yuan1,4; Zhou Jian-min2 |
刊名 | JOURNAL OF MOUNTAIN SCIENCE |
出版日期 | 2022-11-01 |
卷号 | 19期号:11页码:3037-3050 |
ISSN号 | 1672-6316 |
关键词 | Luding Earthquake Mt Gongga Glacier ice snow avalanche Cryosphere hazards |
DOI | 10.1007/s11629-022-7730-x |
英文摘要 | On 5th September 2022, a magnitude Ms-6.8 earthquake occurred nearby Mt. Gongga, western Sichuan. The stability of the glaciers in east Mt. Gongga close to the epicenter was widely concerned due to the strong shake triggered by the earthquake. Using multi-source observations (including in-situ photographs, remote sensing datasets before and after the event), we carried out a preliminary assessment of the stability and hazard risks of the Hailuogou (HLG) glacier. Triggered by the earthquake, a small block of fractured ice at the lowest part of icefall collapsed. The magnitude of the coseismic ice avalanche was relatively small, which is comparable in size to most ice avalanches over the past seven years, but much less than the previous mapped largest one (03 April 2018, runout similar to 699 m). One most recent large (runout similar to 608 m) ice avalanche occurred between 01 and 04 September, just before the earthquake, likely unloaded large amount of ice mass and made a larger ice avalanche avoided during the earthquake shake. Nevertheless, the momentum of collapsed snow-ice-rock mass could be safely unloaded over a wide and gentler-slope ice tongue area, limiting its mobility and the risk of a cascading hazard. Glacier-wide surface flow dynamics monitored by Sentinel-1 satellite SAR time series (12 September 2021-19 September 2022) show that HLG glacier velocity was generally consistent before and after the earthquake. The entire HLG glacier exhibited more stable than expected, with almost no abnormal features detected in its upper accumulation part, the lower ice tongue, and its lateral paraglacial slopes. Since the glacier valley has experienced remarkable downwasting and the paraglacial environment has been strongly disturbed and destabilized, we suggested that, to efficiently evaluate glacier-related cascading hazard risks, it is also necessary to systematically combine multi-source observations (e.g., high-resolution UAV survey, radar/Lidar scan, ground investigation, monitoring and warning systems) to continuously monitor the regional glacier anomalies in the post-earthquake seismic active areas. |
WOS关键词 | XIANSHUIHE FAULT ; SURFACE DEFORMATION ; TEMPERATE GLACIER ; SLOPE FAILURES ; SEGMENT ; GONGGA |
资助项目 | Natural Science Foundation of China[41871069] ; Natural Science Foundation of China[42071084] ; Outstanding Youth Scholars Foundation of Sichuan Province[2021JDJQ0009] |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | SCIENCE PRESS |
WOS记录号 | WOS:000886135800001 |
资助机构 | Natural Science Foundation of China ; Outstanding Youth Scholars Foundation of Sichuan Province |
源URL | [http://ir.imde.ac.cn/handle/131551/56988] |
专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
通讯作者 | Zhang Bo |
作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100094, Peoples R China 3.Univ Geneva, Inst Environm Sci, Climate Change Impacts & Risks Anthropocene C CIA, CH-1205 Geneva, Switzerland 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610299, Peoples R China |
推荐引用方式 GB/T 7714 | Liu Qiaol,Zhang Bo,Zhao Bo,et al. Stability of the Hailuogou glacier during the "9.5" Luding Earthquake: a preliminary assessment based on multi-source observations[J]. JOURNAL OF MOUNTAIN SCIENCE,2022,19(11):3037-3050. |
APA | Liu Qiaol,Zhang Bo,Zhao Bo,Zhong Yan,Lu Xue-yuan,&Zhou Jian-min.(2022).Stability of the Hailuogou glacier during the "9.5" Luding Earthquake: a preliminary assessment based on multi-source observations.JOURNAL OF MOUNTAIN SCIENCE,19(11),3037-3050. |
MLA | Liu Qiaol,et al."Stability of the Hailuogou glacier during the "9.5" Luding Earthquake: a preliminary assessment based on multi-source observations".JOURNAL OF MOUNTAIN SCIENCE 19.11(2022):3037-3050. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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