| DOI: | 10.1002/2015GL066712
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| 论文题名: | Albedo feedback enhanced by smoother Arctic sea ice |
| 作者: | Landy J.C.; Ehn J.K.; Barber D.G.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8323
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| EISSN: | 1944-8054
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| 出版年: | 2015
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| 卷: | 42, 期:24 | | 起始页码: | 10714
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| 结束页码: | 10720
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| 语种: | 英语
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| 英文关键词: | ice-albedo feedback
; ICESat
; melt ponds
; sea ice roughness
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| Scopus关键词: | Advanced very high resolution radiometers (AVHRR)
; Lakes
; Sea ice
; Solar radiation
; Surface roughness
; Surface topography
; Albedo feedbacks
; Arctic sea ice
; Ice albedo feedback
; Ice surface roughness
; ICESat
; Melt ponds
; Operational periods
; Winter sea ices
; Ice
; albedo
; AVHRR
; feedback mechanism
; heating
; ice cover
; ICESat
; melting
; quantitative analysis
; sea ice
; solar radiation
; spatiotemporal analysis
; surface roughness
; topographic effect
; variance analysis
; Arctic
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| 英文摘要: | The ICESat operational period 2003-2008 coincided with a dramatic decline in Arctic sea ice - linked to prolonged melt season duration and enhanced melt pond coverage. Although melt ponds evolve in stages, sea ice with smoother surface topography typically allows the pond water to spread over a wider area, reducing the ice-albedo and accelerating further melt. Here we develop this theory into a quantitative relationship between premelt sea ice surface roughness and summer melt pond coverage. Our method, applied to ICESat observations of the end-of-winter sea ice roughness, can account for 85% of the variance in advanced very high resolution radiometer (AVHRR) observations of the summer ice-albedo. An Arctic-wide reduction in sea ice roughness from 2003 to 2008 explains a drop in ice-albedo that resulted in a 16% increase in solar heat input to the sea ice cover, which represents ten times the heat input contributed by earlier melt onset timing over the same period. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955211626&doi=10.1002%2f2015GL066712&partnerID=40&md5=41ee5b2f10ee17a80e30b146528573c3
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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/7939
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Centre for Earth Observation Science, Riddell Faculty of Environment Earth and Resources, University of Manitoba, Winnipeg, MB, Canada
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| Recommended Citation: | |
Landy J.C.,Ehn J.K.,Barber D.G.. Albedo feedback enhanced by smoother Arctic sea ice[J]. Geophysical Research Letters,2015-01-01,42(24).
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