DOI: 10.1016/j.atmosenv.2015.06.044
Scopus记录号: 2-s2.0-84937026583
论文题名: Spatial, seasonal trends and transboundary transport of PM<inf>2.5</inf> inorganic ions in the Veneto region (Northeastern Italy)
作者: Masiol M ; , Benetello F ; , Harrison R ; M ; , Formenton G ; , De Gaspari F ; , Pavoni B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 117 起始页码: 19
结束页码: 31
语种: 英语
英文关键词: Ionic composition
; Long-range transport
; PM2.5
; Po valley
; Secondary inorganic aerosol
Scopus关键词: Aerosols
; Air quality
; Air quality standards
; Atmospheric movements
; Chemical analysis
; Cluster analysis
; Landforms
; Nitrates
; Particles (particulate matter)
; Pollution
; Scales (weighing instruments)
; Trajectories
; Chemical characteristic
; Ionic composition
; Long range transport
; Mitigation policies
; PO Valley
; Secondary inorganic aerosol
; Spatial variations
; Water soluble inorganic ions
; Ions
; ammonium nitrate
; ion
; sulfate
; aerosol
; air mass
; air quality
; ammonium
; atmospheric pollution
; concentration (composition)
; emission inventory
; inorganic salt
; ionic composition
; long range transport
; nitrate
; particulate matter
; policy development
; pollutant transport
; pollution monitoring
; pollution policy
; spatiotemporal analysis
; standard (regulation)
; sulfur
; trajectory
; transboundary pollution
; trend analysis
; aerosol
; air pollutant
; air quality
; Article
; city
; cluster analysis
; concentration (parameters)
; Italy
; particulate matter
; precursor
; priority journal
; seasonal variation
; trend study
; Italy
; Po Valley
; Veneto
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: The Veneto region lies in the eastern part of the Po Valley (Italy). This is one of the hotspots in Europe for air quality, where efforts to meet the European standard for PM2.5 according to current and future legislation have been generally unsuccessful. Recent data indicating that ammonium, nitrate and sulphate account for about one third of total PM2.5 mass show that secondary inorganic aerosol (SIA) plays a key role in the exceedence of the standards. A sampling campaign for PM2.5 was carried out simultaneously in six major cities (2012-2013). The water soluble inorganic ions were quantified and data processed to: (1) investigate the seasonal trends and the spatial variations of the ionic component of aerosol; (2) identify chemical characteristics at the regional-scale and (3) assess the potential effects of long-range transport using back-trajectory cluster analysis and concentration-weighted trajectory (CWT) models. Results indicated that PM2.5 and SIA ions have an increasing gradient in concentrations from North (mountain) to South (lowland) and from East (coastal) to West (more continental), whereas K+ and Ca2+ levels are quite uniformly distributed. Similar seasonal trends in PM2.5 and ions are seen across the region. Simultaneous daily changes were observed and interpreted as a consequence of similar emission sources, secondary pollutant generation and accumulation/removal processes. Sulphate and nitrate were not directly related to the concentrations of their precursor gases and were generally largely, but not completely, neutralised by ammonium. The clustering of back-trajectories and CWT demonstrate that the long-range movement of the air masses has a major impact upon PM2.5 and ion concentrations: an area spreading from Eastern to Central Europe was identified as a main potential source for most ions. The valley sites are also heavily influenced by local emissions in slow moving northerly air masses. Finally, two episodes of high nitrate levels were investigated to explain why some sites are experiencing much higher concentrations than others. This study identifies some key features in the generation of SIA in the Po Valley, demonstrating that SIA generation is a regional pollution phenomenon and mitigation policies are required at regional, national and even European scales. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81592
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom; Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari Venezia, Dorsoduro 2137, Venezia, Italy; Dipartimento Regionale Laboratori, Agenzia Regionale per la Prevenzione e Protezione Ambientale del Veneto (ARPAV), Via Ospedale 22, Padova, Italy; Department of Environmental Sciences/Center of Excellence in Environmental Studies, King Abdulaziz University, PO Box 80203, Jeddah, Saudi Arabia
Recommended Citation:
Masiol M,, Benetello F,, Harrison R,et al. Spatial, seasonal trends and transboundary transport of PM<inf>2.5</inf> inorganic ions in the Veneto region (Northeastern Italy)[J]. Atmospheric Environment,2015-01-01,117