| DOI: | 10.1002/2015GL065627
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| 论文题名: | Positive tropical marine low-cloud cover feedback inferred from cloud-controlling factors |
| 作者: | Qu X.; Hall A.; Klein S.A.; Deangelis A.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9505
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| EISSN: | 1944-9236
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| 出版年: | 2015
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| 卷: | 42, 期:18 | | 起始页码: | 7767
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| 结束页码: | 7775
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| 语种: | 英语
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| 英文关键词: | cover
; feedback
; low-cloud
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| Scopus关键词: | Atmospheric temperature
; Feedback
; Heat flux
; Latent heat
; Moisture
; Oceanography
; Sensitivity analysis
; Surface waters
; Tropics
; Absorption of solar radiation
; Anthropogenic forcing
; Controlling factors
; cover
; Inversion strength
; Sea surface temperature (SST)
; Surface latent heat fluxes
; Temperature response
; Climate models
; anthropogenic effect
; climate modeling
; cloud cover
; marine atmosphere
; radiative forcing
; sea surface temperature
; solar radiation
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| 英文摘要: | Differences in simulations of tropical marine low-cloud cover (LCC) feedback are sources of significant spread in temperature responses of climate models to anthropogenic forcing. Here we show that in models the feedback is mainly driven by three large-scale changes - a strengthening tropical inversion, increasing surface latent heat flux, and an increasing vertical moisture gradient. Variations in the LCC response to these changes alone account for most of the spread in model-projected 21st century LCC changes. A methodology is devised to constrain the LCC response observationally using sea surface temperature (SST) as a surrogate for the latent heat flux and moisture gradient. In models where the current climate's LCC sensitivities to inversion strength and SST variations are consistent with observed, LCC decreases systematically, which would increase absorption of solar radiation. These results support a positive LCC feedback. Correcting biases in the sensitivities will be an important step toward more credible simulation of cloud feedbacks. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945241933&doi=10.1002%2f2015GL065627&partnerID=40&md5=9ee265d41edaadfa7785fad358cbfefa
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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/9120
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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 Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
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| Recommended Citation: | |
Qu X.,Hall A.,Klein S.A.,et al. Positive tropical marine low-cloud cover feedback inferred from cloud-controlling factors[J]. Geophysical Research Letters,2015-01-01,42(18).
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