DOI: 10.1016/j.atmosenv.2018.04.027
Scopus记录号: 2-s2.0-85046169722
论文题名: Daily behavior of urban Fluorescing Aerosol Particles in northwest Spain
作者: Calvo A ; I ; , Baumgardner D ; , Castro A ; , Fernández-González D ; , Vega-Maray A ; M ; , Valencia-Barrera R ; M ; , Oduber F ; , Blanco-Alegre C ; , Fraile R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 184 起始页码: 262
结束页码: 277
语种: 英语
英文关键词: Biolibrary
; Fluorescing aerosol particles
; Primary biological aerosol particles
; UV-Induced fluorescence
; WIBS
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Measurements of ambient aerosol particles at the University of León, León, Spain, were made in May and June 2015 with a Wideband Integrated Bioaerosol Spectrometer (WIBS). The WIBS detects Fluorescing Aerosol Particles (FAP) in the size range from 0.5 to 20 μm. These measurements were complemented with an analysis of pollen concentrations assessed with optical microscopy of samples captured with a volumetric Hirst spore trap. The total particle, FAP and pollen concentrations show clear, daily cycles. Whereas the total particle concentrations maximize at 0800 and 2200 UTC, the FAP concentrations have peaks at midnight and 0800 UTC while the pollen has a broad peak between 1200 and 2000 UTC. The FAP larger than 2 μm represent 15–35% of the total particle population in this size range, maximizing at midnight UTC. Similar to what has been found by investigators at other locations, there is a strong positive correlation of the WIBS measured FAP with relative humidity; however, the pollen concentration is positively correlated with the temperature and anti-correlated with the relative humidity. Back trajectory analysis indicates that the largest FAP to total particle fractions are found in air masses arriving from the northeast with the second largest coming from the southwest. Given the location of the university in relation to the city and forested areas, this implies that the higher concentration FAP are coming from rural, probably natural, sources; however, more local, anthropogenic sources cannot be ruled out as a secondary source. The majority of the FAP that are identified from microscopy are fungal spores (Cladosporium, Aspergillus, Alternaria, Oidium) and pollen grains (mainly Poaceae, Quercus, Plantago, Rumex and Urticaceae). A comparison of the fluorescence fingerprints between laboratory generated FAP and the ambient particles showed some similarities; however, a significant fraction of the FAP are those whose fluorescence patterns do not match any of those that have been previously classified in the laboratory. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82838
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Physics, IMARENAB University of León, León, Spain; Droplet Measurement Technologies, Longmont, United States; Biodiversity and Environmental Management, University of León, Spain; Institute of Atmospheric Sciences and Climate-CNR, Bologna, Italy
Recommended Citation:
Calvo A,I,, Baumgardner D,et al. Daily behavior of urban Fluorescing Aerosol Particles in northwest Spain[J]. Atmospheric Environment,2018-01-01,184