气候变化领域集成服务门户(CCPortal): Measured Constraints on Cloud Top Entrainment to Reduce Uncertainty of Nonprecipitating Stratocumulus Shortwave Radiative Forcing in the Southern Ocean

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DOI	10.1029/2020GL090513
	Measured Constraints on Cloud Top Entrainment to Reduce Uncertainty of Nonprecipitating Stratocumulus Shortwave Radiative Forcing in the Southern Ocean
	Sanchez K.J.; Roberts G.C.; Diao M.; Russell L.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Stratocumulus cloud top entrainment has a significant effect on cloud properties, but there are few observations quantifying its impact. Using explicit 0-D parcel model simulations, initialized with below-cloud in situ measurements, and validated with in situ measurements of cloud properties, the shortwave cloud radiative forcing (SWCF) was reduced by up to 100 W m−2 by cloud top entrainment in the Southern Ocean. The impact of entrainment-corrected SWCF is between 2 and 20 times that of changes in the aerosol particle concentration or updraft at cloud base. The variability in entrainment-corrected SWCF accounts for up to 50 W m−2 uncertainty in estimating cloud forcing. Measurements necessary for estimating the impact of entrainment on cloud properties can be constrained from existing airborne platforms and provide a first-order approximation for cloud radiative properties of nonprecipitating stratocumulus clouds. These measurement-derived estimates of entrainment can be used to validate and improve parameterizations of entrainment in Global Climate Models. ©2020. The Authors.
英文关键词	Atmospheric radiation; Climate models; Clouds; Aerosol particle concentrations; Airborne platforms; Cloud radiative forcing; Cloud radiative properties; First-order approximations; Global climate model; In-situ measurement; Stratocumulus clouds; Uncertainty analysis; atmospheric forcing; climate modeling; cloud radiative forcing; entrainment; global climate; precipitation assessment; shortwave radiation; stratocumulus; Southern Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169530
作者单位	Scripps Institution of Oceanography, University of California, San Diego, CA, United States; Now at Universities Space Research Association, Columbia, MD, United States; Now at NASA Langley Research Center, Hampton, VA, United States; Centre National de Recherches Météorologiques, Météo-France, CNRS, Toulouse, France; Department of Meteorology and Climate Science, San Jose State University, San Jose, CA, United States
推荐引用方式 GB/T 7714	Sanchez K.J.,Roberts G.C.,Diao M.,et al. Measured Constraints on Cloud Top Entrainment to Reduce Uncertainty of Nonprecipitating Stratocumulus Shortwave Radiative Forcing in the Southern Ocean[J],2020,47(21).
APA	Sanchez K.J.,Roberts G.C.,Diao M.,&Russell L.M..(2020).Measured Constraints on Cloud Top Entrainment to Reduce Uncertainty of Nonprecipitating Stratocumulus Shortwave Radiative Forcing in the Southern Ocean.Geophysical Research Letters,47(21).
MLA	Sanchez K.J.,et al."Measured Constraints on Cloud Top Entrainment to Reduce Uncertainty of Nonprecipitating Stratocumulus Shortwave Radiative Forcing in the Southern Ocean".Geophysical Research Letters 47.21(2020).