globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000520
Scopus记录号: 2-s2.0-84959563799
论文题名:
On the influence of poleward jet shift on shortwave cloud feedback in global climate models
作者: Wall C; J; , Hartmann D; L
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期:4
起始页码: 2044
结束页码: 2059
语种: 英语
英文关键词: Feedback ; Atmospheric warming ; Cloud feedbacks ; Cloud microphysics ; Freezing temperatures ; Global climate model ; High Latitudes ; Shallow convection ; Thermodynamic mechanism ; Climate models ; cloud cover ; cloud microphysics ; condensate ; convection ; freezing ; global climate ; jet ; surface temperature ; thermodynamics ; warming
英文摘要: Experiments designed to separate the effect of atmospheric warming from the effect of shifts of the eddy-driven jet on shortwave (SW) cloud feedback are performed with three global climate models (GCMs). In each model a warming simulation produces a robust SW cloud feedback dipole, with a negative (positive) feedback in the high-latitudes (subtropics). The cloud brightening in high-latitudes that characterizes warming simulations is not produced by jet shifts alone in any of the models, but is highly sensitive to perturbations of freezing temperature seen by the cloud microphysics scheme, indicating that thermodynamic mechanisms involving the phase of cloud condensate dominate the SW feedback at high-latitudes. In one of the models a poleward jet shift causes significant cloud dimming throughout the midlatitudes, but in two models it does not. Differences in cloud response to jet shifts in two of the models are attributed to differences in the shallow convection parameterizations. © 2015. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75942
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Wall C,J,, Hartmann D,et al. On the influence of poleward jet shift on shortwave cloud feedback in global climate models[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(4)
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