气候变化领域集成服务门户(CCPortal): Dependence of Aerosol-Droplet Partitioning on Turbulence in a Laboratory Cloud

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DOI	10.1029/2020JD033799
	Dependence of Aerosol-Droplet Partitioning on Turbulence in a Laboratory Cloud
	Shawon A.S.M.; Prabhakaran P.; Kinney G.; Shaw R.A.; Cantrell W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	Activation is the first step in aerosol-cloud interactions, which have been identified as one of the principal uncertainties in Earth's climate system. Aerosol particles become cloud droplets, or activate, when the ambient saturation ratio exceeds a threshold, which depends on the particle's size and hygroscopicity. In the traditional formulation of the process, only average, uniform saturation ratios are considered. However, turbulent environments like clouds intrinsically have fluctuations around mean values in the scalar fields of temperature and water vapor concentration, which determine the saturation ratio. Through laboratory measurements, we show that these fluctuations are an important parameter that needs to be addressed to fully describe activation. Our results show, even for single-sized, chemically homogeneous aerosols, that fluctuations blur the correspondence between activation and a particle's size and chemical composition, that turbulence can increase the fraction of aerosol particles which activate, and that the activated fraction decreases monotonically as the concentration of aerosol increases. Taken together, our data demonstrate that fluctuations can have effects equivalent to the aerosol limited and updraft limited regimes, known from adiabatic parcel theory. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosol activation; aerosol-cloud interactions; fluctuations; scavenging; turbulence
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/185414
作者单位	Department of Physics, Michigan Technological University, Houghton, MI, United States
推荐引用方式 GB/T 7714	Shawon A.S.M.,Prabhakaran P.,Kinney G.,et al. Dependence of Aerosol-Droplet Partitioning on Turbulence in a Laboratory Cloud[J],2021,126(5).
APA	Shawon A.S.M.,Prabhakaran P.,Kinney G.,Shaw R.A.,&Cantrell W..(2021).Dependence of Aerosol-Droplet Partitioning on Turbulence in a Laboratory Cloud.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Shawon A.S.M.,et al."Dependence of Aerosol-Droplet Partitioning on Turbulence in a Laboratory Cloud".Journal of Geophysical Research: Atmospheres 126.5(2021).