气候变化领域集成服务门户(CCPortal): Fluorescent biological aerosol particles over the central Pacific Ocean: Covariation with ocean surface biological activity indicators

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DOI	10.5194/acp-21-15969-2021
	Fluorescent biological aerosol particles over the central Pacific Ocean: Covariation with ocean surface biological activity indicators
	Kawana K.; Matsumoto K.; Taketani F.; Miyakawa T.; Kanaya Y.
发表日期	2021
ISSN	1680-7316
起始页码	15969
结束页码	15983
卷号	21 期号:20
英文摘要	Combining wideband integrated bioaerosol sensors and DNA-staining techniques, online and offline shipboard observations of fluorescent aerosol particles in the atmosphere were carried out over the central Pacific Ocean during March 2019 to identify bioaerosols and determine their spatiotemporal distribution. To understand the origins of and processes associated with bioaerosols, we conducted correlation analyses of fluorescent particle number concentration, wind speed, and a variety of chemical and biological indicators, including concentrations of chlorophyll a, bacteria, and marine organic gel particles such as transparent exopolymer particles (TEPs) and Coomassie stainable particles (CSPs). Five-day backward trajectory analysis indicated that oceanic air masses were dominant between 6 and 18 March, after which the influence of long-range transport from the continent of Asia was prominent. For the first period, we identified certain types of fluorescent particles as bioaerosols with marine origins, because their number concentrations were highly correlated with concentrations of TEPs and bacteria (R: 0.80-0.92) after considering the wind speed effect. For the second period, there was strong correlation between another type of fluorescent particles and CSPs irrespective of wind speed, implying that the fluorescent particles advected from land were mixed with those of marine origins. From the results of our correlation analysis, we developed equations to derive atmospheric bioaerosol number density in the marine atmosphere over the central Pacific Ocean from a combination of biogenic proxy quantities (chlorophyll a, TEPs, and bacteria) and wind speed. We conclude that it is likely that TEPs were transported from the sea surface to the atmosphere together with bacteria to form fluorescent bioaerosols. © Author(s) 2021.
语种	英语
scopus关键词	aerosol; long range transport; sea surface; spatial distribution; temporal distribution; wind velocity; Asia; Pacific Ocean; Pacific Ocean (Central)
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/246473
作者单位	Earth Surface System Research Center, Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, 2360001, Japan
推荐引用方式 GB/T 7714	Kawana K.,Matsumoto K.,Taketani F.,et al. Fluorescent biological aerosol particles over the central Pacific Ocean: Covariation with ocean surface biological activity indicators[J],2021,21(20).
APA	Kawana K.,Matsumoto K.,Taketani F.,Miyakawa T.,&Kanaya Y..(2021).Fluorescent biological aerosol particles over the central Pacific Ocean: Covariation with ocean surface biological activity indicators.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(20).
MLA	Kawana K.,et al."Fluorescent biological aerosol particles over the central Pacific Ocean: Covariation with ocean surface biological activity indicators".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.20(2021).