| DOI: | 10.1002/2016GL069330
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| 论文题名: | Melt onset over Arctic sea ice controlled by atmospheric moisture transport |
| 作者: | Mortin J.; Svensson G.; Graversen R.G.; Kapsch M.-L.; Stroeve J.C.; Boisvert L.N.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9691
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| EISSN: | 1944-9422
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| 出版年: | 2016
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| 卷: | 43, 期:12 | | 起始页码: | 6636
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| 结束页码: | 6642
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| 语种: | 英语
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| 英文关键词: | Arctic sea ice
; climate variability
; melt onset
; polar meteorology
; remote sensing
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| Scopus关键词: | Atmospheric movements
; Climate change
; Moisture control
; Remote sensing
; Sea ice
; Anomalies of waters
; Arctic sea ice
; Atmospheric moisture
; Atmospheric process
; Climate variability
; Interannual variability
; Long-wave radiation
; Short-wave radiation
; Ice
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| 英文摘要: | The timing of melt onset affects the surface energy uptake throughout the melt season. Yet the processes triggering melt and causing its large interannual variability are not well understood. Here we show that melt onset over Arctic sea ice is initiated by positive anomalies of water vapor, clouds, and air temperatures that increase the downwelling longwave radiation (LWD) to the surface. The earlier melt onset occurs; the stronger are these anomalies. Downwelling shortwave radiation (SWD) is smaller than usual at melt onset, indicating that melt is not triggered by SWD. When melt occurs early, an anomalously opaque atmosphere with positive LWD anomalies preconditions the surface for weeks preceding melt. In contrast, when melt begins late, clearer than usual conditions are evident prior to melt. Hence, atmospheric processes are imperative for melt onset. It is also found that spring LWD increased during recent decades, consistent with trends toward an earlier melt onset. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977521594&doi=10.1002%2f2016GL069330&partnerID=40&md5=b15be0ec4e91e847542cc2316e293c44
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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/10654
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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: | Department of Meteorology and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
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| Recommended Citation: | |
Mortin J.,Svensson G.,Graversen R.G.,et al. Melt onset over Arctic sea ice controlled by atmospheric moisture transport[J]. Geophysical Research Letters,2016-01-01,43(12).
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