| DOI: | 10.1007/s00382-013-1774-0
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| Scopus记录号: | 2-s2.0-84891631434
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| 论文题名: | On the persistent spread in snow-albedo feedback |
| 作者: | Qu X.; Hall A.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2014
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| 卷: | 42, 期:2017-01-02 | | 起始页码: | 69
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| 结束页码: | 81
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| 语种: | 英语
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| 英文关键词: | Seasonal cycle
; Snow-albedo feedback
; Spread
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| 英文摘要: | Snow-albedo feedback (SAF) is examined in 25 climate change simulations participating in the Coupled Model Intercomparison Project version 5 (CMIP5). SAF behavior is compared to the feedback's behavior in the previous (CMIP3) generation of global models. SAF strength exhibits a fivefold spread across CMIP5 models, ranging from 0.03 to 0.16 W m-2 K-1 (ensemble-mean = 0.08 W m-2 K-1). This accounts for much of the spread in 21st century warming of Northern Hemisphere land masses, and is very similar to the spread found in CMIP3 models. As with the CMIP3 models, there is a high degree of correspondence between the magnitudes of seasonal cycle and climate change versions of the feedback. Here we also show that their geographical footprint is similar. The ensemble-mean SAF strength is close to an observed estimate of the real climate's seasonal cycle feedback strength. SAF strength is strongly correlated with the climatological surface albedo when the ground is covered by snow. The inter-model variation in this quantity is surprisingly large, ranging from 0.39 to 0.75. Models with large surface albedo when these regions are snow-covered will also have a large surface albedo contrast between snow-covered and snow-free regions, and therefore a correspondingly large SAF. Widely-varying treatments of vegetation masking of snow-covered surfaces are probably responsible for the spread in surface albedo where snow occurs, and the persistent spread in SAF in global climate models. © 2013 Springer-Verlag Berlin Heidelberg. |
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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/54681
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, 90095-1565, United States
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| Recommended Citation: | |
Qu X.,Hall A.. On the persistent spread in snow-albedo feedback[J]. Climate Dynamics,2014-01-01,42(2017-01-02)
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