Scopus记录号: 2-s2.0-85058142905
论文题名: Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia
作者: Dehecq A. ; Gourmelen N. ; Gardner A.S. ; Brun F. ; Goldberg D. ; Nienow P.W. ; Berthier E. ; Vincent C. ; Wagnon P. ; Trouvé E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2019
卷: 12, 期: 1 起始页码: 22
结束页码: 27
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
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. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122645
Appears in Collections: 气候变化事实与影响
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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
Recommended Citation:
Dehecq A.,Gourmelen N.,Gardner A.S.,et al. Twenty-first century glacier slowdown driven by mass loss in High Mountain Asia[J]. Nature Geoscience,2019-01-01,12(1)