气候变化领域集成服务门户(CCPortal): Simulating Observations of Southern Ocean Clouds and Implications for Climate

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DOI	10.1029/2020JD032619
	Simulating Observations of Southern Ocean Clouds and Implications for Climate
	Gettelman A.; Bardeen C.G.; McCluskey C.S.; Järvinen E.; Stith J.; Bretherton C.; McFarquhar G.; Twohy C.; D'Alessandro J.; Wu W.
发表日期	2020
ISSN	2169897X
卷号	125 期号:21
英文摘要	Southern Ocean (S. Ocean) clouds are important for climate prediction. Yet previous global climate models failed to accurately represent cloud phase distributions in this observation-sparse region. In this study, data from the Southern Ocean Clouds, Radiation, Aerosol, Transport Experimental Study (SOCRATES) experiment is compared to constrained simulations from a global climate model (the Community Atmosphere Model, CAM). Nudged versions of CAM are found to reproduce many of the features of detailed in situ observations, such as cloud location, cloud phase, and boundary layer structure. The simulation in CAM6 has improved its representation of S. Ocean clouds with adjustments to the ice nucleation and cloud microphysics schemes that permit more supercooled liquid. Comparisons between modeled and observed hydrometeor size distributions suggest that the modeled hydrometeor size distributions represent the dual peaked shape and form of observed distributions, which is remarkable given the scale difference between model and observations. Comparison to satellite observations of cloud physics is difficult due to model assumptions that do not match retrieval assumptions. Some biases in the model's representation of S. Ocean clouds and aerosols remain, but the detailed cloud physical parameterization provides a basis for process level improvement and direct comparisons to observations. This is crucial because cloud feedbacks and climate sensitivity are sensitive to the representation of S. Ocean clouds. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	clouds; observations; Southern Ocean; supercooled water
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185670
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States; NorthWest Research Associates, Redmond, WA, United States
推荐引用方式 GB/T 7714	Gettelman A.,Bardeen C.G.,McCluskey C.S.,et al. Simulating Observations of Southern Ocean Clouds and Implications for Climate[J],2020,125(21).
APA	Gettelman A..,Bardeen C.G..,McCluskey C.S..,Järvinen E..,Stith J..,...&Wu W..(2020).Simulating Observations of Southern Ocean Clouds and Implications for Climate.Journal of Geophysical Research: Atmospheres,125(21).
MLA	Gettelman A.,et al."Simulating Observations of Southern Ocean Clouds and Implications for Climate".Journal of Geophysical Research: Atmospheres 125.21(2020).