气候变化领域集成服务门户(CCPortal): Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015

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DOI	10.5194/tc-11-407-2017
	Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015
	King O.; Quincey D.J.; Carrivick J.L.; Rowan A.V.
发表日期	2017
ISSN	19940416
卷号	11 期号:1
英文摘要	Region-wide averaging of Himalayan glacier mass change has masked any catchment or glacier-scale variability in glacier recession; thus the role of a number of glaciological processes in glacier wastage remains poorly understood. In this study, we quantify mass loss rates over the period 2000-2015 for 32 glaciers across the Everest region and assess how future ice loss is likely to differ depending on glacier hypsometry. The mean mass balance of all 32 glaciers in our sample was -0.52±0.22m water equivalent (w.e.)a-1. The mean mass balance of nine lacustrine-terminating glaciers (-0.70±0.26mw.e.a-1) was 32% more negative than land-terminating, debris-covered glaciers (-0.53±0.21mw.e.a-1). The mass balance of lacustrine-terminating glaciers is highly variable (-0.45±0.13 to -0.91±0.22mw.e.a-1), perhaps reflecting glacial lakes at different stages of development. To assess the importance of hypsometry on glacier response to future temperature increases, we calculated current (Dudh Koshi - 0.41, Tama Koshi - 0.43, Pumqu - 0.37) and prospective future glacier accumulation area Ratios (AARs). IPCC AR5 RCP 4.5 warming (0.9-2.3°C by 2100) could reduce AARs to 0.29 or 0.08 in the Tama Koshi catchment, 0.27 or 0.17 in the Dudh Koshi catchment and 0.29 or 0.18 in the Pumqu catchment. Our results suggest that glacial lake expansion across the Himalayas could expedite ice mass loss and the prediction of future contributions of glacial meltwater to river flow will be complicated by spatially variable glacier responses to climate change. © Author(s) 2017.
学科领域	catchment; geoaccumulation; glacial debris; glacial lake; glacier mass balance; hypsometry; mass wasting; spatial variation; spatiotemporal analysis; temperature; Himalayas; Khumbu Himal; Mount Everest
语种	英语
scopus关键词	catchment; geoaccumulation; glacial debris; glacial lake; glacier mass balance; hypsometry; mass wasting; spatial variation; spatiotemporal analysis; temperature; Himalayas; Khumbu Himal; Mount Everest
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/119445
作者单位	School of Geography and Waterleeds, University of Leeds, Leeds, LS2 9JT, United Kingdom; Department of Geography, University of Sheffield, Sheffield, S10 2TN, United Kingdom
推荐引用方式 GB/T 7714	King O.,Quincey D.J.,Carrivick J.L.,et al. Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015[J],2017,11(1).
APA	King O.,Quincey D.J.,Carrivick J.L.,&Rowan A.V..(2017).Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015.Cryosphere,11(1).
MLA	King O.,et al."Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015".Cryosphere 11.1(2017).