气候变化领域集成服务门户(CCPortal): Aerosol impacts on warm-cloud microphysics and drizzle in a moderately polluted environment

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DOI	10.5194/acp-21-4487-2021
	Aerosol impacts on warm-cloud microphysics and drizzle in a moderately polluted environment
	Chen Y.-C.; Wang S.-H.; Min Q.; Lu S.; Lin P.-L.; Lin N.-H.; Chung K.-S.; Joseph E.
发表日期	2021
ISSN	1680-7316
起始页码	4487
结束页码	4502
卷号	21 期号:6
英文摘要	Climate is critically affected by aerosols, which alter cloud lifecycles and precipitation distribution through radiative and microphysical effects. In this study, aerosol and cloud property datasets from MODIS (Moderate Resolution Imaging Spectroradiometer), onboard the Aqua satellite, and surface observations, including aerosol concentrations, raindrop size distribution, and meteorological parameters, were used to statistically quantify the effects of aerosols on low-level warm-cloud microphysics and drizzle over northern Taiwan during multiple fall seasons (from 15 October to 30 November of 2005-2017). Our results indicated that northwestern Taiwan, which has several densely populated cities, is dominated by low-level clouds (e.g., warm, thin, and broken clouds) during the fall season. The observed effects of aerosols on warm clouds indicated aerosol indirect effects (i.e., increased aerosol loading caused a decrease in cloud effective radius (CER)), an increase in cloud optical thickness, an increase in cloud fraction, and a decrease in cloud-top temperature under a fixed cloud water path. Quantitatively, aerosol-cloud interactions (ACI = - σ lnCER/σlnα \|CWP, changes in CER relative to changes in aerosol amounts) were 0.07 for our research domain and varied between 0.09 and 0.06 in the surrounding remote (i.e., ocean) and polluted (i.e., land) areas, respectively, indicating aerosol indirect effects were stronger in the remote area. From the raindrop size distribution analysis, high aerosol loading resulted in a decreased frequency of drizzle events, redistribution of cloud water to more numerous and smaller droplets, and reduced collision-coalescence rates. However, during light rain (≤1 mm h-1), high aerosol concentrations drove raindrops towards smaller droplet sizes and increased the appearance of drizzle drops. This study used long-term surface and satellite data to determine aerosol variations in northern Taiwan, effects on clouds and precipitation, and observational strategies for future research on aerosol-cloud-precipitation interactions. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; cloud microphysics; cloud water; drizzle; MODIS; optical property; precipitation (climatology); raindrop; size distribution; Taiwan
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247037
作者单位	Department of Atmospheric Sciences, National Central University, Taoyuan, Taiwan; Center for Environmental Monitoring and Technology, National Central University, Taoyuan, Taiwan; Atmospheric Sciences Research Center, University at Albany, State University of New York, Albany, NY, United States; Joint Center for Satellite Data Assimilation, Boulder, CO, United States; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Chen Y.-C.,Wang S.-H.,Min Q.,et al. Aerosol impacts on warm-cloud microphysics and drizzle in a moderately polluted environment[J],2021,21(6).
APA	Chen Y.-C..,Wang S.-H..,Min Q..,Lu S..,Lin P.-L..,...&Joseph E..(2021).Aerosol impacts on warm-cloud microphysics and drizzle in a moderately polluted environment.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(6).
MLA	Chen Y.-C.,et al."Aerosol impacts on warm-cloud microphysics and drizzle in a moderately polluted environment".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.6(2021).