气候变化领域集成服务门户(CCPortal): Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic

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DOI	10.5194/acp-20-14741-2020
	Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic
	Wang Y.; Zheng X.; Dong X.; Xi B.; Wu P.; Logan T.; Yung Y.L.
发表日期	2020
ISSN	1680-7316
起始页码	14741
结束页码	14755
卷号	20 期号:23
英文摘要	Vertical profiles of aerosols are inadequately observed and poorly represented in climate models, contributing to the current large uncertainty associated with aerosol cloud interactions. The US Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Aerosol and Cloud Experiments in the Eastern North Atlantic (ACEENA) aircraft field campaign near the Azores islands provided ample observations of vertical distributions of aerosol and cloud properties. Here we utilize the in situ aircraft measurements from the ACE-ENA and ground-based remotesensing data along with an aerosol-Aware Weather Research and Forecast (WRF) model to characterize the aerosols due to long-range transport over a remote region and to assess their possible influence on marine-boundary-layer (MBL) clouds. The vertical profiles of aerosol and cloud properties measured via aircraft during the ACE-ENA campaign provide detailed information revealing the physical contact between transported aerosols and MBL clouds. The European Centre for Medium-Range Weather Forecasts Copernicus Atmosphere Monitoring Service (ECMWF-CAMS) aerosol reanalysis data can reproduce the key features of aerosol vertical profiles in the remote region. The cloud-resolving WRF sensitivity experiments with distinctive aerosol profiles suggest that the transported aerosols and MBL cloud interactions (ACIs) require not only aerosol plumes to get close to the marine-boundary-layer top but also large cloud top height variations. Based on those criteria, the observations show that the occurrence of ACIs involving the transport of aerosol over the eastern North Atlantic (ENA) is about 62% in summer. For the case with noticeable long-rangetransport aerosol effects on MBL clouds, the susceptibilities of droplet effective radius and liquid water content are 0.11 and C0.14, respectively. When varying by a similar magnitude, aerosols originating from the boundary layer exert larger microphysical influence on MBL clouds than those entrained from the free troposphere. © 2020 BMJ Publishing Group. All rights reserved.
英文关键词	aerosol; boundary layer; cloud; long range transport; marine atmosphere; troposphere; vertical profile; Atlantic Ocean; Atlantic Ocean (North)
语种	英语
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/168927
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Department of Atmospheric Sciences, Texas AandM University, College Station, TX, United States
推荐引用方式 GB/T 7714	Wang Y.,Zheng X.,Dong X.,et al. Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic[J],2020,20(23).
APA	Wang Y..,Zheng X..,Dong X..,Xi B..,Wu P..,...&Yung Y.L..(2020).Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic.Atmospheric Chemistry and Physics,20(23).
MLA	Wang Y.,et al."Impacts of long-range transport of aerosols on marine-boundary-layer clouds in the eastern North Atlantic".Atmospheric Chemistry and Physics 20.23(2020).