气候变化领域集成服务门户(CCPortal): Dependence of cloud radiation on cloud overlap, horizontal inhomogeneity, and vertical alignment in stratiform and convective regions

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DOI	10.1016/j.atmosres.2020.105358
	Dependence of cloud radiation on cloud overlap, horizontal inhomogeneity, and vertical alignment in stratiform and convective regions
	Wang X.; Miao H.; Liu Y.; Bao Q.
发表日期	2021
ISSN	0169-8095
卷号	249
英文摘要	In this study, the dependence of cloud radiation on several cloud subgrid-scale structures that are unresolved by conventional climate models is explored, using datasets produced by a cloud-resolving model for both stratiform and convective clouds. These subgrid-scale structural parameters to be investigated are decorrelation length Lcf for overlapping of cloud fraction, Lcw for overlapping cloud condensate, and shape parameter v for measuring cloud inhomogeneity. It is found the decorrelation length Lcw has a similar role to the inhomogeneity parameter v in modulating cloud radiative effects (CREs), with increasing (decreasing) Lcw generally leading to a weakening (enhancing) of CREs, which is equivalent to increasing (decreasing) v in individual layers. However, the uncertainty of CREs caused by changes in Lcw is relatively smaller than that induced by changes in v, with the former about twice smaller than the latter. For fractional clouds with multiple layers, it is revealed that cloud overlap parameter Lcf exerts impacts on radiative transfer process first and foremost, and the inhomogeneity parameter v is of secondary importance, followed by the alignment parameter Lcw, which renders moderate modulation that can not be neglected. This study also highlights the importance of the vertically varying structure of v in cloud radiation. The simulated CREs and radiative heating fields can be significantly biased if these varying characteristics are missing, even if the obtained variability of cloud water path is close to reality. This calls for more attention to the vertical structure of v in parameterization development, which is however neglected or poorly represented in the literature. © 2020 The Authors
英文关键词	Cloud inhomogeneity; Cloud overlap; Cloud radiative effects (CREs); KWAJEX; M-PACE; Vertical alignment
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236901
作者单位	State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences (CAS), Beijing, China; College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Wang X.,Miao H.,Liu Y.,et al. Dependence of cloud radiation on cloud overlap, horizontal inhomogeneity, and vertical alignment in stratiform and convective regions[J],2021,249.
APA	Wang X.,Miao H.,Liu Y.,&Bao Q..(2021).Dependence of cloud radiation on cloud overlap, horizontal inhomogeneity, and vertical alignment in stratiform and convective regions.Atmospheric Research,249.
MLA	Wang X.,et al."Dependence of cloud radiation on cloud overlap, horizontal inhomogeneity, and vertical alignment in stratiform and convective regions".Atmospheric Research 249(2021).