| DOI: | 10.1007/s00382-015-2862-0
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| Scopus记录号: | 2-s2.0-84944557094
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| 论文题名: | Global patterns of solar influence on high cloud cover |
| 作者: | Dima M.; Voiculescu M.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2016
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| 卷: | 47, 期:2017-01-02 | | 起始页码: | 667
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| 结束页码: | 678
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| 语种: | 英语
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| 英文关键词: | Convection
; High clouds
; Pacific Ocean
; Solar forcing
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| 英文摘要: | One of the main sources of uncertainty in climate projections is represented by clouds, which have a profound influence on the Earth’s radiation budget through the feedbacks in which they are involved. The improvement of clouds representation in General Circulation Models relies largely on constraints derived from observations and on correct identification of processes that influence cloud formation or lifetime. Here we identify solar forced high cloud cover (HCC) patterns in reanalysis and observed data extending over the 1871–2009 period, based on their associations with known fingerprints of the same forcing on surface air temperature, sea surface temperature (SST) and sea level pressure fields. The solar influence on HCC has maximum amplitudes over the Pacific basin, where HCC anomalies are distributed in bands of alternating polarities. The colocation of the HCC and SST anomalies bands indicates a thermal influence on high clouds through convection and an amplification of the HCC anomalies by a positive feedback of long-wave fluxes, which increases the solar signal. Consistent with numerical simulations, the solar forced HCC pattern appears to be generated through a constructive interference between the so-called “top-down” and “bottom-up” mechanisms of solar influence on climate and is amplified by ocean–atmosphere positive feedbacks. © 2015, 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/53629
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Faculty of Physics, University of Bucharest, Bucharest, Romania; University “Dunărea de Jos” of Galaţi, Galaţi, Romania
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| Recommended Citation: | |
Dima M.,Voiculescu M.. Global patterns of solar influence on high cloud cover[J]. Climate Dynamics,2016-01-01,47(2017-01-02)
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