气候变化领域集成服务门户(CCPortal): Recognition of Inter-Cloud Versus Intra-Cloud Controls on Droplet Dispersion With Applications to Microphysics Parameterization

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DOI	10.1029/2021JD035180
	Recognition of Inter-Cloud Versus Intra-Cloud Controls on Droplet Dispersion With Applications to Microphysics Parameterization
	Hu A.Z.; Igel A.L.; Chuang P.Y.; Witte M.K.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	Aerosols in the atmosphere can have a large impact on weather and climate. One of its lesser-known impacts is the aerosol-dispersion effect, which refers to the feedback between the aerosol (or cloud droplet) concentration and the relative dispersion of the droplet size distribution. This study attempts to reconcile the inconsistent sign of the correlation between aerosol number and droplet dispersion found in past studies by distinguishing local correlation from cloud-mean correlation. We find that while the cloud-mean correlation between aerosol concentration and droplet size relative dispersion is largely nonexistent, in-cloud regions with high relative dispersion are typically associated with low local droplet concentration. Even stronger correlation is found with respect to the local activation fraction (the ratio of droplet concentration to total droplet and aerosol concentration). Based on this local correlation, we propose a new equation to diagnose the shape parameter in marine stratocumulus clouds for double moment bulk schemes in cloud-resolving or large-eddy simulations. This new equation is more physically realistic than many existing ones that are based on the weak cloud-mean correlation. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol-cloud interaction; bulk scheme parameterization; relative dispersion; stratocumulus
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/236992
作者单位	Atmospheric Science Graduate Group, University of California Davis, Davis, CA, United States; Department of Land, Air and Water Resources, University of California Davis, Davis, CA, United States; Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA, United States; Department of Meteorology, Naval Postgraduate School, Monterey, CA, United States
推荐引用方式 GB/T 7714	Hu A.Z.,Igel A.L.,Chuang P.Y.,et al. Recognition of Inter-Cloud Versus Intra-Cloud Controls on Droplet Dispersion With Applications to Microphysics Parameterization[J],2021,126(18).
APA	Hu A.Z.,Igel A.L.,Chuang P.Y.,&Witte M.K..(2021).Recognition of Inter-Cloud Versus Intra-Cloud Controls on Droplet Dispersion With Applications to Microphysics Parameterization.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Hu A.Z.,et al."Recognition of Inter-Cloud Versus Intra-Cloud Controls on Droplet Dispersion With Applications to Microphysics Parameterization".Journal of Geophysical Research: Atmospheres 126.18(2021).