DOI: 10.1016/j.atmosenv.2014.09.061
Scopus记录号: 2-s2.0-84908003721
论文题名: Urban influence on increasing ozone concentrations in a characteristic Mediterranean agglomeration
作者: Escudero M ; , Lozano A ; , Hierro J ; , Valle J ; D ; , Mantilla E
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 99 起始页码: 322
结束页码: 332
语种: 英语
英文关键词: Emission reductions
; NOx
; Ozone
; Urban areas
; Weekend effect
Scopus关键词: Emission reduction
; Ozone concentration
; Urban areas
; Weekend effects
; Ozone
; nitrogen oxide
; ozone
; air quality
; concentration (composition)
; Mediterranean environment
; ozone
; particulate matter
; pollution control
; pollution policy
; urban ecosystem
; air pollution
; air pollution control
; air quality
; ambient air
; Article
; exhaust gas
; meteorology
; particulate matter
; population density
; population exposure
; rural area
; Southern Europe
; urban area
; Aragon
; Spain
; Zaragoza
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: Air quality in cities has been extensively studied due to the high population density potentially exposed to high levels of pollutants. The main problems in urban areas have been related to particulate matter (PM) and NO2. Less attention has been directed towards O3 because urban levels are generally lower than those recorded in rural areas. The implementation of air quality plans, together with technological improvements, have resulted in reductions of PM and NO2 levels in many European cities. In contrast, urban O3 levels have experimented increases which may respond to declining NOx emission trends. It is therefore necessary to intensify the study of urban O3 and its potential relation with NOx variations. In the agglomeration of Zaragoza (NE Spain), traffic circulation through the centre has dropped by 28.3% since 2008 due to several factors such as the implementation of a mobility plan, the completion of major construction projects and the economic crisis in Spain. The study of this case offers a unique opportunity to evaluate the impact of reductions in NOx emissions on the levels of O3 in a characteristic Mediterranean city. This work analyses the variability and trends of ambient air levels of O3 and NOx in Zaragoza and the Ebro valley from 2007 to 2012. Results demonstrate that, although the main factor explaining O3 variability is still linked to meteorology, changes in NOx emissions strongly influence O3 variability and trends, mainly due to interaction with fresh NO. Specific analysis of the O3 "weekend effect" show a significant correlation (r2=0.81) between the drop of NO concentrations (associated to emissions) and the increment of O3 levels during weekends. Moreover, trend analyses reveal that the decline in NOx emissions in Zaragoza from 2007 to 2012 can be associated with significant increments in O3 levels. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80500
Appears in Collections: 气候变化事实与影响
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作者单位: Centro Universitario de la Defensa (CUD) de Zaragoza, Academia General Militar, Ctra. de Huesca s/n, Zaragoza, Spain; Instituto Universitario Centro de Estudios Ambientales del Mediterráneo (CEAM-UMH), Parque Tecnológico C/Charles R. Darwin 14, Paterna, Spain
Recommended Citation:
Escudero M,, Lozano A,, Hierro J,et al. Urban influence on increasing ozone concentrations in a characteristic Mediterranean agglomeration[J]. Atmospheric Environment,2014-01-01,99