气候变化领域集成服务门户(CCPortal): Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia

CCPortal

DOI	10.1038/s41561-018-0271-9
	Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia
	Dehecq A.; Gourmelen N.; Gardner A.S.; Brun F.; Goldberg D.; Nienow P.W.; Berthier E.; Vincent C.; Wagnon P.; Trouvé E.
发表日期	2019
ISSN	17520894
卷号	12 期号:1
英文摘要	Glaciers in High Mountain Asia have experienced heterogeneous rates of loss since the 1970s. Yet, the associated changes in ice flow that lead to mass redistribution and modify the glacier sensitivity to climate are poorly constrained. Here we present observations of changes in ice flow for all glaciers in High Mountain Asia over the period 2000–2017, based on one million pairs of optical satellite images. Trend analysis reveals that in 9 of the 11 surveyed regions, glaciers show sustained slowdown concomitant with ice thinning. In contrast, the stable or thickening glaciers of the Karakoram and West Kunlun regions experience slightly accelerated glacier flow. Up to 94% of the variability in velocity change between regions can be explained by changes in gravitational driving stress, which in turn is largely controlled by changes in ice thickness. We conclude that, despite the complexities of individual glacier behaviour, decadal and regional changes in ice flow are largely insensitive to changes in conditions at the bed of the glacier and can be well estimated from ice thickness change and slope alone. © 2018, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	flow velocity; glacier; glacier mass balance; ice flow; ice thickness; mountain region; satellite imagery; trend analysis; twenty first century; Asia; China; Karakoram; Kunlun Mountains
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124743
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Université Savoie Mont Blanc, LISTIC, Annecy, France; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; IPGS UMR 7516, Université de Strasbourg, CNRS, Strasbourg, France; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France; LEGOS, Université de Toulouse, CNES, CNRS, IRD, UPS, Toulouse, France
推荐引用方式 GB/T 7714	Dehecq A.,Gourmelen N.,Gardner A.S.,et al. Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia[J],2019,12(1).
APA	Dehecq A..,Gourmelen N..,Gardner A.S..,Brun F..,Goldberg D..,...&Trouvé E..(2019).Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia.Nature Geoscience,12(1).
MLA	Dehecq A.,et al."Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia".Nature Geoscience 12.1(2019).