气候变化领域集成服务门户(CCPortal): Satellite Retrieval of Cloud Condensation Nuclei Concentrations in Marine Stratocumulus by Using Clouds as CCN Chambers

CCPortal

DOI	10.1029/2020JD032409
	Satellite Retrieval of Cloud Condensation Nuclei Concentrations in Marine Stratocumulus by Using Clouds as CCN Chambers
	Efraim A.; Rosenfeld D.; Schmale J.; Zhu Y.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	A new methodology for the satellite retrieval of cloud condensation nuclei (CCN) in shallow marine boundary layer clouds is developed and validated in this study. The methodology is based on retrieving cloud base drop concentrations (Nd) and updrafts (Wb), which are used for calculating the supersaturation (S). The Nd is then defined as the CCN at that S. The accuracy of the satellite retrievals was validated against ship-borne measurements of CCN done in recent campaigns in the Southern Oceans (ACE-SPACE, MARCUS, & PEGASO [2015–2018]) and in the subtropics (MAGIC [2012–2013]). The satellite-retrieved Nd and S at cloud base were validated against the measured CCN at sea surface. The main findings show that (a) coupled clouds have good agreement between satellite retrievals and ship measurements of CCN; (b) the best agreement is achieved when using the brightest 10% of the clouds and accounting for their adiabatic fraction; (c) most of the decoupled clouds had much lower CCN than were present at the underlying surface. This means that most CCN in the coupled clouds originate from the surface and not from the free troposphere. This study validates the satellite retrievals of CCN and allows us to further quantify the relationships between CCN and cloud microphysical properties. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	CCN; clouds; droplet concentration; validation
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/185812
作者单位	Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel; School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Paul Scherrer Institute, Villigen, Switzerland; Meteorological Institute of Shaanxi Province, Xian, China
推荐引用方式 GB/T 7714	Efraim A.,Rosenfeld D.,Schmale J.,et al. Satellite Retrieval of Cloud Condensation Nuclei Concentrations in Marine Stratocumulus by Using Clouds as CCN Chambers[J],2020,125(16).
APA	Efraim A.,Rosenfeld D.,Schmale J.,&Zhu Y..(2020).Satellite Retrieval of Cloud Condensation Nuclei Concentrations in Marine Stratocumulus by Using Clouds as CCN Chambers.Journal of Geophysical Research: Atmospheres,125(16).
MLA	Efraim A.,et al."Satellite Retrieval of Cloud Condensation Nuclei Concentrations in Marine Stratocumulus by Using Clouds as CCN Chambers".Journal of Geophysical Research: Atmospheres 125.16(2020).