globalchange  > 气候减缓与适应
DOI: 10.1038/s41561-017-0039-7
论文题名:
Massive collapse of two glaciers in western Tibet in 2016 after surge-like instability
作者: Kääb A.; Leinss S.; Gilbert A.; Bühler Y.; Gascoin S.; Evans S.G.; Bartelt P.; Berthier E.; Brun F.; Chao W.-A.; Farinotti D.; Gimbert F.; Guo W.; Huggel C.; Kargel J.S.; Leonard G.J.; Tian L.; Treichler D.; Yao T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2018
卷: 11, 期:2
起始页码: 114
结束页码: 120
语种: 英语
Scopus关键词: avalanche ; bottom friction ; catastrophic event ; climate forcing ; collapse ; field survey ; glacier dynamics ; glacier surge ; instability ; mobility ; numerical model ; remote sensing ; satellite data ; weather ; Caucasus ; China ; Xizang
英文摘要: Surges and glacier avalanches are expressions of glacier instability, and among the most dramatic phenomena in the mountain cryosphere. Until now, the catastrophic collapse of a glacier, combining the large volume of surges and mobility of ice avalanches, has been reported only for the 2002 130 × 106 m3 detachment of Kolka Glacier (Caucasus Mountains), which has been considered a globally singular event. Here, we report on the similar detachment of the entire lower parts of two adjacent glaciers in western Tibet in July and September 2016, leading to an unprecedented pair of giant low-angle ice avalanches with volumes of 68 ± 2 × 106 m3 and 83 ± 2 × 106 m3. On the basis of satellite remote sensing, numerical modelling and field investigations, we find that the twin collapses were caused by climate- and weather-driven external forcing, acting on specific polythermal and soft-bed glacier properties. These factors converged to produce surge-like enhancement of driving stresses and massively reduced basal friction connected to subglacial water and fine-grained bed lithology, to eventually exceed collapse thresholds in resisting forces of the tongues frozen to their bed. Our findings show that large catastrophic instabilities of low-angle glaciers can happen under rare circumstances without historical precedent. © 2018 The Authors 2017, under exclusive licence to Macmillan Publishers Limited, part of Springer Nature.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105617
Appears in Collections:气候减缓与适应
科学计划与规划

Files in This Item:

There are no files associated with this item.


作者单位: Department of Geosciences, University of Oslo, Oslo, Norway; Institute of Environmental Engineering, ETH Zurich, Zurich, Switzerland; WSL Institute for Snow and Avalanche Research SLF, Davos Dorf, Switzerland; CESBIO, CNES, CNRS, IRD, UPS, Université de Toulouse, Toulouse, France; Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON, Canada; LEGOS, CNES, CNRS, IRD, UPS, Université de Toulouse, Toulouse, France; CNRS, IRD, Grenoble INP, IGE, Univ. Grenoble Alpes, Grenoble, France; Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan; Laboratory of Hydraulics, Hydrology and Glaciology, ETH Zurich, Zurich, Switzerland; Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland; Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu, China; Department of Geography, University of Zurich, Zurich, Switzerland; Department of Hydrology and Atmospheric Sciences, Planetary Science Institute, University of Arizona, Tucson, AZ, United States; Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Institute of Tibetan Research, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Kääb A.,Leinss S.,Gilbert A.,et al. Massive collapse of two glaciers in western Tibet in 2016 after surge-like instability[J]. Nature Geoscience,2018-01-01,11(2)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Kääb A.]'s Articles
[Leinss S.]'s Articles
[Gilbert A.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Kääb A.]'s Articles
[Leinss S.]'s Articles
[Gilbert A.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Kääb A.]‘s Articles
[Leinss S.]‘s Articles
[Gilbert A.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.