气候变化领域集成服务门户(CCPortal): A long-term study of cloud residuals from low-level Arctic clouds

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DOI	10.5194/acp-21-8933-2021
	A long-term study of cloud residuals from low-level Arctic clouds
	Karlsson L.; Krejci R.; Koike M.; Ebell K.; Zieger P.
发表日期	2021
ISSN	1680-7316
起始页码	8933
结束页码	8959
卷号	21 期号:11
英文摘要	To constrain uncertainties in radiative forcings associated with aerosol-cloud interactions, improved understanding of Arctic cloud formation is required, yet long-term measurements of the relevant cloud and aerosol properties remain sparse. We present the first long-term study of cloud residuals, i.e. particles that were involved in cloud formation and cloud processes, in Arctic low-level clouds measured at Zeppelin Observatory, Svalbard. To continuously sample cloud droplets and ice crystals and separate them from non-activated aerosol, a ground-based counter-flow virtual impactor inlet system (GCVI) was used. A detailed evaluation of the GCVI measurements, using concurrent cloud particle size distributions, meteorological parameters, and aerosol measurements, is presented for both warm and cold clouds, and the potential contribution of sampling artefacts is discussed in detail. We find an excellent agreement of the GCVI sampling efficiency of liquid clouds using two independent approaches. The 2-year data set of cloud residual size distributions and number concentrations reveals that the cloud residuals follow the typical seasonal cycle of Arctic aerosol, with a maximum concentration in spring and summer and a minimum concentration in the late autumn and winter months. We observed average activation diameters in the range of 58-78ĝ€nm for updraught velocities below 1ĝ€ms-1. A cluster analysis also revealed cloud residual size distributions that were dominated by Aitken mode particles down to around 20-30ĝ€nm. During the winter months, some of these small particles may be the result of ice, snow, or ice crystal shattering artefacts in the GCVI inlet; however, cloud residuals down to 20ĝ€nm in size were also observed during conditions when artefacts are less likely. © Copyright:
语种	英语
scopus关键词	aerosol property; arctic environment; cloud microphysics; cluster analysis; concentration (composition); observatory; particle size; Arctic; Svalbard; Svalbard and Jan Mayen
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/246811
作者单位	Department of Environmental Science, Stockholm University, Stockholm, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Earth and Planetary Science, University of Tokyo, Tokyo, Japan; Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany
推荐引用方式 GB/T 7714	Karlsson L.,Krejci R.,Koike M.,et al. A long-term study of cloud residuals from low-level Arctic clouds[J],2021,21(11).
APA	Karlsson L.,Krejci R.,Koike M.,Ebell K.,&Zieger P..(2021).A long-term study of cloud residuals from low-level Arctic clouds.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Karlsson L.,et al."A long-term study of cloud residuals from low-level Arctic clouds".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).