Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain

This paper analyses surface ozone measurements at five stations in an urban area (Valladolid) in the upper Spanish plateau over the period 2002–2020. Temporal evolutions, the relationship between ozone and other pollutants such as nitrogen oxides, and the assessment of the ozone concentration trend...

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Autores principales:	M. Ángeles García, Javier Villanueva, Nuria Pardo, Isidro A. Pérez, M. Luisa Sánchez
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	atmospheric conditions long-range transport ozone concentration seasonal variation trend Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/d24a8c3516d94b8587644543be05cb0c
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id	oai:doaj.org-article:d24a8c3516d94b8587644543be05cb0c
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spelling	oai:doaj.org-article:d24a8c3516d94b8587644543be05cb0c2021-11-25T16:45:33ZAnalysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain10.3390/atmos121114952073-4433https://doaj.org/article/d24a8c3516d94b8587644543be05cb0c2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1495https://doaj.org/toc/2073-4433This paper analyses surface ozone measurements at five stations in an urban area (Valladolid) in the upper Spanish plateau over the period 2002–2020. Temporal evolutions, the relationship between ozone and other pollutants such as nitrogen oxides, and the assessment of the ozone concentration trend during the study period were analysed. Daily evolution of ozone at all the stations showed mean maximum concentrations in the afternoon, 15:00 GMT, with values ranging between 73.8 and 80.9 µg m<sup>−3</sup>, evidencing the influence of photochemical processes favoured by solar radiation in ozone formation. The lowest levels were recorded at night and in the early morning, 7:00 GMT, and were between 23.4 and 32.3 µg m<sup>−3</sup>, related with the reduction by NO reactions and deposition processes. A broad spring–summer peak between May and July was seen, with the highest values in the latter, with a mean value of up to 73.8 µg m<sup>−3</sup>. The variation in the monthly mean ozone concentrations of the different percentiles was analysed using a harmonic model. The empirical equation described the experimental values satisfactorily, with a confidence level of 95% and coefficients of determination above 80%, confirming the major decreasing trend in the ozone peak values over the study period.M. Ángeles GarcíaJavier VillanuevaNuria PardoIsidro A. PérezM. Luisa SánchezMDPI AGarticleatmospheric conditionslong-range transportozone concentrationseasonal variationtrendMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1495, p 1495 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	atmospheric conditions long-range transport ozone concentration seasonal variation trend Meteorology. Climatology QC851-999
spellingShingle	atmospheric conditions long-range transport ozone concentration seasonal variation trend Meteorology. Climatology QC851-999 M. Ángeles García Javier Villanueva Nuria Pardo Isidro A. Pérez M. Luisa Sánchez Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain
description	This paper analyses surface ozone measurements at five stations in an urban area (Valladolid) in the upper Spanish plateau over the period 2002–2020. Temporal evolutions, the relationship between ozone and other pollutants such as nitrogen oxides, and the assessment of the ozone concentration trend during the study period were analysed. Daily evolution of ozone at all the stations showed mean maximum concentrations in the afternoon, 15:00 GMT, with values ranging between 73.8 and 80.9 µg m<sup>−3</sup>, evidencing the influence of photochemical processes favoured by solar radiation in ozone formation. The lowest levels were recorded at night and in the early morning, 7:00 GMT, and were between 23.4 and 32.3 µg m<sup>−3</sup>, related with the reduction by NO reactions and deposition processes. A broad spring–summer peak between May and July was seen, with the highest values in the latter, with a mean value of up to 73.8 µg m<sup>−3</sup>. The variation in the monthly mean ozone concentrations of the different percentiles was analysed using a harmonic model. The empirical equation described the experimental values satisfactorily, with a confidence level of 95% and coefficients of determination above 80%, confirming the major decreasing trend in the ozone peak values over the study period.
format	article
author	M. Ángeles García Javier Villanueva Nuria Pardo Isidro A. Pérez M. Luisa Sánchez
author_facet	M. Ángeles García Javier Villanueva Nuria Pardo Isidro A. Pérez M. Luisa Sánchez
author_sort	M. Ángeles García
title	Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain
title_short	Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain
title_full	Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain
title_fullStr	Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain
title_full_unstemmed	Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain
title_sort	analysis of ozone concentrations between 2002–2020 in urban air in northern spain
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d24a8c3516d94b8587644543be05cb0c
work_keys_str_mv	AT mangelesgarcia analysisofozoneconcentrationsbetween20022020inurbanairinnorthernspain AT javiervillanueva analysisofozoneconcentrationsbetween20022020inurbanairinnorthernspain AT nuriapardo analysisofozoneconcentrationsbetween20022020inurbanairinnorthernspain AT isidroaperez analysisofozoneconcentrationsbetween20022020inurbanairinnorthernspain AT mluisasanchez analysisofozoneconcentrationsbetween20022020inurbanairinnorthernspain
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Analysis of Ozone Concentrations between 2002–2020 in Urban Air in Northern Spain

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