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DOI	10.5194/acp-19-1665-2019
	Characterisation and source identification of biofluorescent aerosol emissions over winter and summer periods in the United Kingdom
	Forde E.; Gallagher M.; Foot V.; Sarda-Esteve R.; Crawford I.; Kaye P.; Stanley W.; Topping D.
发表日期	2019
ISSN	16807316
起始页码	1665
结束页码	1684
卷号	19 期号:3
英文摘要	Primary biological aerosol particles (PBAPs) are an abundant subset of atmospheric aerosol particles which comprise viruses, bacteria, fungal spores, pollen, and fragments such as plant and animal debris. The abundance and diversity of these particles remain poorly constrained, causing significant uncertainties for modelling scenarios and for understanding the potential implications of these particles in different environments. PBAP concentrations were studied at four different sites in the United Kingdom (Weybourne, Davidstow, Capel Dewi, and Chilbolton) using an ultraviolet light-induced fluorescence (UV-LIF) instrument, the Wideband Integrated Bioaerosol Spectrometer (WIBS), versions 3 and 4. Using hierarchical agglomerative cluster (HAC) analysis, particles were statistically discriminated. Fluorescent particles and clusters were then analysed by comparing to laboratory data of known particle types, assessing their diurnal variation and examining their relationship to the meteorological variables temperature, relative humidity, wind speed, and wind direction. Using local land cover types, sources of the suspected fluorescent particles and clusters were then identified. Most sites exhibited a wet discharged fungal spore dominance, with the exception of one site, Davidstow, which had higher concentrations of bacteria, suggested to result from the presence of a local dairy factory and farm. Differences were identified as to the sources of wet discharged fungal spores, with particles originating from arable and horticultural land at Chilbolton, and improved grassland areas at Weybourne. Total fluorescent particles at Capel Dewi were inferred to comprise two sources, with bacteria originating from the broadleaf and coniferous woodland and wet discharged fungal spores from nearby improved grassland areas, similar to Weybourne. The use of the HAC method and a higher fluorescence threshold (9 standard deviations instead of 3) produced clusters which were considered to be biological following the complete analysis. More published data and information on the reaction of different speciated biological particle types to fluctuations in meteorological conditions, such as relative humidity and temperature, would aid particle type characterisation in studies such as this. © 2019 Author(s).
语种	英语
scopus关键词	aerosol; bacterium; fluorescence spectroscopy; particulate matter; pollen; source identification; spore; summer; virus; winter; United Kingdom; Animalia
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/144654
作者单位	Centre for Atmospheric Science, School of Earth and Environmental Science, University of Manchester, Manchester, United Kingdom; Defence Science and Technology Laboratory, Porton Down, Salisbury, United Kingdom; Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette, France; Particle Instruments Research Group, University of Hertfordshire, Hatfield, Hertfordshire, United Kingdom
推荐引用方式 GB/T 7714	Forde E.,Gallagher M.,Foot V.,et al. Characterisation and source identification of biofluorescent aerosol emissions over winter and summer periods in the United Kingdom[J],2019,19(3).
APA	Forde E..,Gallagher M..,Foot V..,Sarda-Esteve R..,Crawford I..,...&Topping D..(2019).Characterisation and source identification of biofluorescent aerosol emissions over winter and summer periods in the United Kingdom.Atmospheric Chemistry and Physics,19(3).
MLA	Forde E.,et al."Characterisation and source identification of biofluorescent aerosol emissions over winter and summer periods in the United Kingdom".Atmospheric Chemistry and Physics 19.3(2019).