000131280 001__ 131280
000131280 005__ 20240207154753.0
000131280 0247_ $$2doi$$a10.1016/j.atmosenv.2014.09.061
000131280 0248_ $$2sideral$$a87942
000131280 037__ $$aART-2014-87942
000131280 041__ $$aeng
000131280 100__ $$0(orcid)0000-0001-8227-5689$$aEscudero, M.
000131280 245__ $$aUrban influence on increasing ozone concentrations in a characteristic Mediterranean agglomeration
000131280 260__ $$c2014
000131280 5060_ $$aAccess copy available to the general public$$fUnrestricted
000131280 5203_ $$aAir quality in cities has been extensively studied due to the high population density potentially exposed to high levels of pollutants. The main problems in urban areas have been related to particulate matter (PM) and NO2. Less attention has been directed towards O3 because urban levels are generally lower than those recorded in rural areas. The implementation of air quality plans, together with technological improvements, have resulted in reductions of PM and NO2 levels in many European cities. In contrast, urban
O3 levels have experimented increases which may respond to declining NOx emission trends. It is therefore necessary to intensify the study of urban O3 and its potential relation with NOx variations. In the agglomeration of Zaragoza (NE Spain), traffic circulation through the centre has dropped by 28.3% since 2008 due to several factors such as the implementation of a mobility plan, the completion of major construction projects and the economic crisis in Spain. The study of this case offers a unique opportunity to evaluate the impact of reductions in NOx emissions on the levels of O3 in a characteristic Mediterranean city. This work analyses the variability and trends of ambient air levels of O3 and NOx in Zaragoza and the Ebro valley from 2007 to 2012. Results demonstrate that, although the main factor explaining O3 variability is still linked to meteorology, changes in NOx emissions strongly influence O3 variability and trends, mainly due to interaction with fresh NO. Specific analysis of the O3 “weekend effect” show a significant correlation (r2 ¼ 0.81) between the drop of NO concentrations (associated to emissions) and the increment of O3 levels during weekends. Moreover, trend analyses reveal that the decline in NOx emissions in Zaragoza from 2007 to 2012 can be associated with significant increments in O3 levels.
000131280 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000131280 590__ $$a3.281$$b2014
000131280 591__ $$aMETEOROLOGY & ATMOSPHERIC SCIENCES$$b15 / 76 = 0.197$$c2014$$dQ1$$eT1
000131280 591__ $$aENVIRONMENTAL SCIENCES$$b42 / 222 = 0.189$$c2014$$dQ1$$eT1
000131280 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/submittedVersion
000131280 700__ $$0(orcid)0000-0002-1184-5901$$aLozano, A.
000131280 700__ $$0(orcid)0000-0002-5821-1666$$aHierro, J.
000131280 700__ $$0(orcid)0000-0002-9414-4720$$aValle, J. D.
000131280 700__ $$aMantilla, E.
000131280 773__ $$g99 (2014), 322-332$$pAtmos. environ. (1994)$$tAtmospheric Environment$$x1352-2310
000131280 8564_ $$s9441576$$uhttps://zaguan.unizar.es/record/131280/files/texto_completo.pdf$$yPreprint
000131280 8564_ $$s1620148$$uhttps://zaguan.unizar.es/record/131280/files/texto_completo.jpg?subformat=icon$$xicon$$yPreprint
000131280 909CO $$ooai:zaguan.unizar.es:131280$$particulos$$pdriver
000131280 951__ $$a2024-02-07-14:36:53
000131280 980__ $$aARTICLE