| DOI: | 10.1002/2013GL058228
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| 论文题名: | Summer melt regulates winter glacier flow speeds throughout Alaska |
| 作者: | Burgess E.W.; Larsen C.F.; Forster R.R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8317
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| EISSN: | 1944-8048
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| 出版年: | 2013
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| 卷: | 40, 期:23 | | 起始页码: | 6160
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| 结束页码: | 6164
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| 语种: | 英语
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| 英文关键词: | Alaska
; ice dynamics
; mountain glaciers
; offset tracking
; subglacial hydrology
; winter
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| Scopus关键词: | Alaska
; Ice dynamics
; Mountain glaciers
; Offset tracking
; Subglacial hydrology
; winter
; Climate change
; Sea level
; Glaciers
; climate change
; forecasting method
; geometry
; glacial hydrology
; glacier flow
; ice sheet
; melting
; prediction
; sea level change
; summer
; velocity
; Alaska
; United States
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| 英文摘要: | Predicting how climate change will affect glacier and ice sheet flow speeds remains a large hurdle toward accurate sea level rise forecasting. Increases in surface melt rates are known to accelerate glacier flow in summer, whereas in winter, flow speeds are believed to be relatively invariant. Here we show that wintertime flow speeds on nearly all major glaciers throughout Alaska are not only variable but are inversely related to melt from preceding summers. For each additional meter of summertime melt, we observe an 11% decrease in wintertime velocity on glaciers of all sizes, geometries, climates, and bed types. This dynamic occurs because interannual differences in summertime melt affect how much water is retained in the subglacial system during winter. The ubiquity of the dynamic indicates it occurs globally on glaciers and ice sheets not frozen to their beds and thus constitutes a new mechanism affecting sea level rise projections. Key Points Winter flow speeds of glaciers slow 11% for each additional meter of summer melt The response occurs because melt modulates subglacial water storage in winter The dynamic is ubiquitous in Alaska and likely occurs globally in temperate ice ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84889831916&doi=10.1002%2f2013GL058228&partnerID=40&md5=e55f876c15e4e3a103700cb3e84262a3
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| Citation statistics: |
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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/5581
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775, United States
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| Recommended Citation: | |
Burgess E.W.,Larsen C.F.,Forster R.R.. Summer melt regulates winter glacier flow speeds throughout Alaska[J]. Geophysical Research Letters,2013-01-01,40(23).
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