DOI: 10.5194/tc-11-407-2017
Scopus记录号: 2-s2.0-85011634481
论文题名: Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015
作者: King O ; , Quincey D ; J ; , Carrivick J ; L ; , Rowan A ; V
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 1 起始页码: 407
结束页码: 426
语种: 英语
英文关键词: catchment
; geoaccumulation
; glacial debris
; glacial lake
; glacier mass balance
; hypsometry
; mass wasting
; spatial variation
; spatiotemporal analysis
; temperature
; Himalayas
; Khumbu Himal
; Mount Everest
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75603
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: School of Geography and Waterleeds, University of Leeds, Leeds, United Kingdom; Department of Geography, University of Sheffield, Sheffield, United Kingdom
Recommended Citation:
King O,, Quincey D,J,et al. Spatial variability in mass loss of glaciers in the everest region, central Himalayas, between 2000 and 2015[J]. Cryosphere,2017-01-01,11(1)