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DOI	10.1016/j.atmosenv.2020.118144
	Spatiotemporal variability and sources of aerosol water-soluble organic nitrogen (WSON); in the Eastern Mediterranean
	Tsagkaraki M.; Theodosi C.; Grivas G.; Vargiakaki E.; Sciare J.; Savvides C.; Mihalopoulos N.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	This study aims to characterize the variability and sources of water-soluble organic nitrogen (WSON) in aerosol over Cyprus in the Eastern Mediterranean. Measurements of PM10 particles were conducted during the calendar year of 2011 at two sites, located at a roadside location in Nicosia (urban traffic) and in the rural area of Agia Marina Xyliatou (regional background). Filter samples were analyzed for water-soluble total nitrogen (WSTN), nitrate and ammonium, to determine WSON. Additional analyses were performed, for water-soluble organic carbon (WSOC), organic and elemental carbon (OC and EC), major ions and trace metals. Annual mean WSON concentrations of 0.20 and 0.16 μgN m−3 were determined at the urban traffic and regional background sites, respectively. The organic fraction of WSTN was about 20%, with limited inter-site and seasonal variability. Distinct seasonal patterns were observed at the two sites, with warm-period concentrations being significantly higher at the regional background site, while the enhanced local emissions during winter at the traffic site smoothed out the observed variability. Mean WSON/WSOC ratios of 0.09–0.12 were calculated at the two sites, with the two parameters being weakly correlated. A roadside WSON enhancement was verified, although moderate on an annual basis (9%). However, concentrations in Nicosia were more than one time higher than the background during winter. The observed temporal and inter-site variability highlighted the necessity of source apportionment, which was performed using Positive Matrix Factorization (PMF) modeling, utilizing the analytical datasets at the two sites. In this way, the estimated contribution of regional transport of processed aerosols was found to be more pronounced at the regional background site (59% vs. 38%), while a sizeable input (35%) was linked to vehicular emissions at the traffic site. An additional anthropogenic impact, probably related to biomass burning, was estimated at both sites (16%), while contributions of natural sources like mineral dust (4–8%) and marine aerosol (2–3%) were smaller. © 2020 Elsevier Ltd
英文关键词	Aerosols; Atmospheric movements; Factorization; Organic carbon; Roadsides; Trace elements; Anthropogenic impacts; Eastern Mediterranean; Organic and elemental carbon; Positive matrix factorization models; Seasonal variability; Source apportionment; Spatiotemporal variability; Water-soluble organic carbon; Urban growth; amino acid; ammonia; methylamine; nitrate; organic carbon; organic nitrogen; rain; trace metal; volatile organic compound; aboveground biomass; aerosol; ammonium; elemental carbon; mineral dust; nitrate; organic carbon; organic nitrogen; rural area; solubility; solubilization; spatiotemporal analysis; aerosol; Article; carbon footprint; climate change; comparative study; controlled study; geographic origin; inductively coupled plasma mass spectrometry; limit of detection; mineral dust; molecular weight; PM10 exposure; prevalence; priority journal; rural area; secondary organic aerosol; spatiotemporal analysis; urban area; Cyprus; Nicosia [Cyprus]
语种	英语
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/169066
作者单位	Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, Heraklion Crete, 71003, Greece; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, Athens, 15236, Greece; Climate and Atmospheric Research Center, The Cyprus Institute, Nicosia, 2121, Cyprus; Department of Labour Inspection (DLI), Ministry of Labour, Welfare and Social Insurance, Nicosia, 2121, Cyprus
推荐引用方式 GB/T 7714	Tsagkaraki M.,Theodosi C.,Grivas G.,et al. Spatiotemporal variability and sources of aerosol water-soluble organic nitrogen (WSON); in the Eastern Mediterranean[J],2021,246.
APA	Tsagkaraki M..,Theodosi C..,Grivas G..,Vargiakaki E..,Sciare J..,...&Mihalopoulos N..(2021).Spatiotemporal variability and sources of aerosol water-soluble organic nitrogen (WSON); in the Eastern Mediterranean.Atmospheric Environment,246.
MLA	Tsagkaraki M.,et al."Spatiotemporal variability and sources of aerosol water-soluble organic nitrogen (WSON); in the Eastern Mediterranean".Atmospheric Environment 246(2021).