DOI: 10.1002/2014MS000355
Scopus记录号: 2-s2.0-85027950951
论文题名: Cloud feedbacks on greenhouse warming in the superparameterized climate model SP-CCSM4
作者: Bretherton C ; S ; , Blossey P ; N ; , Stan C
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2014
卷: 6, 期: 4 起始页码: 1185
结束页码: 1204
语种: 英语
英文关键词: Atmospheric temperature
; Carbon dioxide
; Clouds
; Feedback
; Greenhouses
; Oceanography
; Surface waters
; Atmospheric components
; Cloud feedbacks
; Cloud resolving model
; Community climate system model
; Global climate model
; Mid-latitude storms
; Sea surface temperature (SST)
; Superparameterization
; Climate models
; atmospheric convection
; carbon dioxide
; climate feedback
; climate modeling
; cloud cover
; cumulus
; global climate
; parameterization
; warming
英文摘要: Cloud feedbacks on greenhouse warming are studied in a superparameterized version of the Community Climate System Model (SP-CCSM4) in an atmospheric component SP-CAM4 that explicitly simulates cumulus convection. A 150 year simulation in an abrupt quadrupling of CO2 is branched from a control run. It develops moderate positive global cloud feedback and an implied climate sensitivity of 2.8 K comparable to the conventionally parameterized CCSM4 and the median of other modern climate models. All of SP-CCSM4's positive shortwave cloud feedback is due to a striking decrease in low cloud over land, which is much more pronounced than in most other climate models, including CCSM4. Four other cloud responses - decreased midlevel cloud, more Arctic water and ice cloud, a slight poleward shift of midlatitude storm track cloud, and an upward shift of high clouds - are also typical of conventional global climate models. SP-CCSM4 does not simulate the large warming-induced decrease in Southern Ocean cloud found in CCSM4. Two companion uncoupled SP-CAM4 simulations, one with a uniform 4 K sea-surface temperature increase and one with quadrupled CO2 but fixed SST, suggest that SP-CCSM4's global-scale cloud changes are primarily mediated by the warming, rather than by rapid adjustments to increased CO2. SP-CAM4 show spatial patterns of cloud response qualitatively similar to the previous-generation superparameterized SP-CAM3, but with systematically more positive low cloud feedbacks over low-latitude land and ocean. Key Points: The superparameterized SP-CCSM4 has moderate positive cloud feedbacks It simulates less low cloud over land as climate warms SP-CCSM4 rapid cloud adjustments associated with abrupt CO2 increase are weak © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76109
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; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA, United States
Recommended Citation:
Bretherton C,S,, Blossey P,et al. Cloud feedbacks on greenhouse warming in the superparameterized climate model SP-CCSM4[J]. Journal of Advances in Modeling Earth Systems,2014-01-01,6(4)