| DOI: | 10.5194/tc-11-133-2017
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| Scopus记录号: | 2-s2.0-85010011103
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| 论文题名: | Brief communication: Thinning of debris-covered and debris-free glaciers in a warming climate |
| 作者: | Banerjee A
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2017
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| 卷: | 11, 期:1 | | 起始页码: | 133
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| 结束页码: | 138
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| 语种: | 英语
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| 英文关键词: | climate effect
; flow modeling
; geodetic datum
; glacial debris
; glacier
; glacier flow
; mass balance
; melting
; numerical model
; velocity profile
; warming
; Himalayas
; Karakoram
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| 英文摘要: | Recent geodetic mass-balance measurements reveal similar thinning rates on glaciers with or without debris cover in the Himalaya-Karakoram region. This comes as a surprise as a thick debris cover reduces the surface melting significantly due to its insulating effects. Here we present arguments, supported by results from numerical flowline model simulations of idealised glaciers, that a competition between the changes in the surface mass-balance forcing and that of the emergence/submergence velocities can lead to similar thinning rates on these two types of glaciers. As the climate starts warming, the thinning rate on a debris-covered glacier is initially smaller than that on a similar debris-free glacier. Subsequently, the rate on the debris-covered glacier becomes comparable to and then larger than that on the debris-free one. The time evolution of glacier-averaged thinning rates after an initial warming is strongly controlled by the time variation of the corresponding emergence velocity profile. © 2017 Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75619
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| 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: | Earth and Climate Science, Indian Institute of Science Education and Research, Pune, India
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| Recommended Citation: | |
Banerjee A. Brief communication: Thinning of debris-covered and debris-free glaciers in a warming climate[J]. Cryosphere,2017-01-01,11(1)
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