气候变化领域集成服务门户(CCPortal): Ice nucleating behavior of different tree pollen in the immersion mode

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DOI	10.1016/j.atmosenv.2020.117488
	Ice nucleating behavior of different tree pollen in the immersion mode
	Gute E.; Abbatt J.P.D.
发表日期	2020
ISSN	1352-2310
卷号	231
英文摘要	Biological particles, including pollen, are released into the atmosphere in large amounts and carry components which can initiate ice nucleation (IN) under cloud conditions. In this study, we investigate in immersion mode the ice nucleation ability of eleven different tree pollen from deciduous and evergreen trees. Droplet freezing experiments are conducted, where we find the IN ability of filtered tree pollen aqueous suspensions to vary over more than 10 °C and ice nucleation to be triggered by subpollen particles that are smaller than 0.45 μm in size. The presence of full pollen grains in the sample does not significantly change the median freezing temperature. The IN activity of the pollen samples is complemented by total organic carbon (TOC) analysis, which allows calculation of the number of ice nucleating particles per mass of carbon. Infrared analysis of the bulk samples does not clearly indicate whether specific functional groups are correlated to the ability of the subpollen particles to nucleate ice. © 2020 Elsevier Ltd
关键词	Cloud water Droplet freezing technique Ice nucleation Primary biological aerosol particles Subpollen particles
语种	英语
scopus关键词	Crystallization; Forestry; Freezing; Nucleation; Organic carbon; Particle size analysis; Suspensions (fluids); Aqueous suspensions; Biological particles; Evergreen trees; Freezing experiments; Freezing temperatures; Infrared analysis; Specific functional groups; Total Organic Carbon; Ice; carbon; ice; experimental study; pollen; temperature effect; total organic carbon; Alnus incana; aqueous solution; Article; calculation; evergreen; freezing; immersion; infrared spectroscopy; pollen; priority journal; suspension; temperature; total organic carbon
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249168
作者单位	Department of Chemistry, University of Toronto, Toronto, Canada
推荐引用方式 GB/T 7714	Gute E.,Abbatt J.P.D.. Ice nucleating behavior of different tree pollen in the immersion mode[J],2020,231.
APA	Gute E.,&Abbatt J.P.D..(2020).Ice nucleating behavior of different tree pollen in the immersion mode.ATMOSPHERIC ENVIRONMENT,231.
MLA	Gute E.,et al."Ice nucleating behavior of different tree pollen in the immersion mode".ATMOSPHERIC ENVIRONMENT 231(2020).