| DOI: | 10.5194/tc-9-1183-2015
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| Scopus记录号: | 2-s2.0-84930943422
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| 论文题名: | Winter speed-up of quiescent surge-type glaciers in Yukon, Canada |
| 作者: | Abe T; , Furuya M
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2015
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| 卷: | 9, 期:3 | | 起始页码: | 1183
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| 结束页码: | 1190
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| 语种: | 英语
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| 英文关键词: | glacial hydrology
; glacier
; glacier dynamics
; meltwater
; sliding
; spatiotemporal analysis
; water storage
; Alaska
; Canada
; United States
; Yukon Territory
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| 英文摘要: | Glacier surges often initiate in winter, but the mechanism remains unclear in contrast to the well-known summer speed-up at normal glaciers. To better understand the mechanism, we used radar images to examine spatial-temporal changes in the ice velocity of surge-type glaciers near the border of Alaska and the Yukon, focusing on their quiescent phase. We found significant accelerations in the upstream region from autumn to winter, regardless of surging episodes. Moreover, the winter speed-up propagated from upstream to downstream. Given the absence of surface meltwater input in winter, we suggest the presence of water storage near the base that does not directly connect to the surface, yet can promote basal sliding through increased water pressure. Our findings have implications for the modelling of glacial hydrology in winter, which may help us better understand glacier dynamics. © Author(s) 2015. |
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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/75287
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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: | Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan
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| Recommended Citation: | |
Abe T,, Furuya M. Winter speed-up of quiescent surge-type glaciers in Yukon, Canada[J]. Cryosphere,2015-01-01,9(3)
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