气候变化领域集成服务门户(CCPortal): The impact of biomass burning and aqueous-phase processing on air quality: A multi-year source apportionment study in the Po Valley, Italy

CCPortal

DOI	10.5194/acp-20-1233-2020
	The impact of biomass burning and aqueous-phase processing on air quality: A multi-year source apportionment study in the Po Valley, Italy
	Paglione M.; Gilardoni S.; Rinaldi M.; Decesari S.; Zanca N.; Sandrini S.; Giulianelli L.; Bacco D.; Ferrari S.; Poluzzi V.; Scotto F.; Trentini A.; Poulain L.; Herrmann H.; Wiedensohler A.; Canonaco F.; Prévôt A.S.H.; Massoli P.; Carbone C.; Facchini M.C.; Fuzzi S.
发表日期	2020
ISSN	1680-7316
起始页码	1233
结束页码	1254
卷号	20 期号:3
英文摘要	The Po Valley (Italy) is a well-known air quality hotspot characterized by particulate matter (PM) levels well above the limit set by the European Air Quality Directive and by the World Health Organization, especially during the colder season. In the framework of Emilia-Romagna regional project "Supersito", the southern Po Valley submicron aerosol chemical composition was characterized by means of high-resolution aerosol mass spectroscopy (HR-AMS) with the specific aim of organic aerosol (OA) characterization and source apportionment. Eight intensive observation periods (IOPs) were carried out over 4 years (from 2011 to 2014) at two different sites (Bologna, BO, urban background, and San Pietro Capofiume, SPC, rural background), to characterize the spatial variability and seasonality of the OA sources, with a special focus on the cold season. On the multi-year basis of the study, the AMS observations show that OA accounts for averages of 45 ± 8 % (ranging from 33 % to 58 %) and 46 ± 7 % (ranging from 36 % to 50 %) of the total non-refractory submicron particle mass (PM1-NR) at the urban and rural sites, respectively. Primary organic aerosol (POA) comprises biomass burning (23±13 % of OA) and fossil fuel (12±7 %) contributions with a marked seasonality in concentration. As expected, the biomass burning contribution to POA is more significant at the rural site (urban / rural concentration ratio of 0.67), but it is also an important source of POA at the urban site during the cold season, with contributions ranging from 14 % to 38 % of the total OA mass. Secondary organic aerosol (SOA) contributes to OA mass to a much larger extent than POA at both sites throughout the year (69 ± 16 % and 83 ± 16 % at the urban and rural sites, respectively), with important implications for public health. Within the secondary fraction of OA, the measurements highlight the importance of biomass burning aging products during the cold season, even at the urban background site. This biomass burning SOA fraction represents 14 %-44 % of the total OA mass in the cold season, indicating that in this region a major contribution of combustion sources to PM mass is mediated by environmental conditions and atmospheric reactivity. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; air quality; biomass burning; chemical composition; particulate matter; seasonality; source apportionment; spatial variation; Italy; Po Valley; Emilia
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/248010
作者单位	Italian National Research Council, Institute of Atmospheric Sciences and Climate (CNR-ISAC), Bologna, 40129, Italy; Regional Agency for Prevention Environment and Energy (ARPAE) of Emilia-Romagna, Bologna, Italy; Leibniz-Institut für Troposphärenforschung (TROPOS), Leipzig, 04318, Germany; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, 5232, Switzerland; Aerodyne Research Inc., Billerica, MA, United States; MultiSensor Scientific Inc., Greentown Labs, Sommerville, MA, United States; Proambiente S.c.r.l., CNR Research Area, Bologna, Italy; Department of Chemistry, Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, Helsinki, 00014, Finland
推荐引用方式 GB/T 7714	Paglione M.,Gilardoni S.,Rinaldi M.,et al. The impact of biomass burning and aqueous-phase processing on air quality: A multi-year source apportionment study in the Po Valley, Italy[J],2020,20(3).
APA	Paglione M..,Gilardoni S..,Rinaldi M..,Decesari S..,Zanca N..,...&Fuzzi S..(2020).The impact of biomass burning and aqueous-phase processing on air quality: A multi-year source apportionment study in the Po Valley, Italy.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(3).
MLA	Paglione M.,et al."The impact of biomass burning and aqueous-phase processing on air quality: A multi-year source apportionment study in the Po Valley, Italy".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.3(2020).