气候变化领域集成服务门户(CCPortal): Complex plant-derived organic aerosol as ice-nucleating particles-more than the sums of their parts?

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DOI	10.5194/acp-20-11387-2020
	Complex plant-derived organic aerosol as ice-nucleating particles-more than the sums of their parts?
	Steinke I.; Hiranuma N.; Funk R.; Höhler K.; Tüllmann N.; Silas Umo N.; Weidler P.G.; Möhler O.; Leisner T.
发表日期	2020
ISSN	1680-7316
起始页码	11387
结束页码	11397
卷号	20 期号:19
英文摘要	Quantifying the impact of complex organic particles on the formation of ice crystals in clouds remains challenging, mostly due to the vast number of different sources ranging from sea spray to agricultural areas. In particular, there are many open questions regarding the ice nucleation properties of organic particles released from terrestrial sources such as decaying plant material. In this work, we present results from laboratory studies investigating the immersion freezing properties of individual organic compounds commonly found in plant tissue and complex organic aerosol particles from vegetated environments, without specifically investigating the contribution from biological particles, which may contribute to the overall ice nucleation efficiency observed at high temperatures. To characterize the ice nucleation properties of plant-related aerosol samples for temperatures between 242 and 267 K, we used the Aerosol Interaction and Dynamics in the Atmosphere (AIDA) cloud chamber and the Ice Nucleation SpEctrometer of the Karlsruhe Institute of Technology (INSEKT), which is a droplet freezing assay. Individual plant components (polysaccharides, lignin, soy and rice protein) were mostly less ice active, or similarly ice active, compared to microcrystalline cellulose, which has been suggested by recent studies to be a proxy for quantifying the primary cloud ice formation caused by particles originating from vegetation. In contrast, samples from ambient sources with a complex organic matter composition (agricultural soils and leaf litter) were either similarly ice active or up to 2 orders of magnitude more ice active than cellulose. Of all individual organic plant components, only carnauba wax (i.e., lipids) showed a similarly high ice nucleation activity as that of the samples from vegetated environments over a temperature range between 245 and 252 K. Hence, based on our experimental results, we suggest considering cellulose as being representative for the average ice nucleation activity of plant-derived particles, whereas lignin and plant proteins tend to provide a lower limit. In contrast, complex biogenic particles may exhibit ice nucleation activities which are up to 2 orders of magnitude higher than observed for cellulose, making ambient plant-derived particles a potentially important contributor to the population of ice-nucleating particles in the troposphere, even though major uncertainties regarding their transport to cloud altitude remain. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; cloud; ice crystal; nucleation; particle size; troposphere
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/247491
作者单位	Institute of Meteorology and Climate Research-Atmospheric Aerosol Research (IMK-AAF), Karlsruhe Institute of Technology, Karlsruhe, Germany; Department of Life Earth, and Environmental Sciences, West Texas AandM University, Canyon, TX, United States; Working Group Landscape Pedology, Leibniz Centre for Agricultural Landscape Research (ZALF, Müncheberg, Germany; Institute of Functional Interfaces, Karlsruhe Institute of Technology, Karlsruhe, Germany
推荐引用方式 GB/T 7714	Steinke I.,Hiranuma N.,Funk R.,et al. Complex plant-derived organic aerosol as ice-nucleating particles-more than the sums of their parts?[J],2020,20(19).
APA	Steinke I..,Hiranuma N..,Funk R..,Höhler K..,Tüllmann N..,...&Leisner T..(2020).Complex plant-derived organic aerosol as ice-nucleating particles-more than the sums of their parts?.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(19).
MLA	Steinke I.,et al."Complex plant-derived organic aerosol as ice-nucleating particles-more than the sums of their parts?".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.19(2020).