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| Titel |
Local and regional oxidant levels (OX = O3 + NO2) measured in a polluted area in central-southern of Iberian Peninsula |
| VerfasserIn |
A. Notario, I. Bravo, J. A. Adame, Y. Díaz-de-Mera, A. Aranda, A. Rodriguez, D. Rodriguez |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250061292
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| Zusammenfassung |
| The relationship between ambient concentrations of O3, NO, NO2, NOx and oxidant (OX = O3 + NO2) was investigated for the first time in central-southern of the Iberian Peninsula. This is the area with the highest concentration of heavy industry in central Spain, which experiences frequent photochemical pollution events. A detailed air pollution database was observed from two monitoring stations, over a 24-month period (around 210000 data, during 2008 and 2009). For the purpose of this analysis, the concentration of OX was calculated using the sum of a NOx -independent ‘regional’ contribution (i.e. the O3 background), and a linearly NOx -dependent ‘local’ contribution. First, monthly dependence of regional and local OX concentration was observed to determine when the maximum values may be expected. The variation of OX concentrations with levels of NOx was then measured, in order to pinpoint the atmospheric sources of OX in the polluted areas. The ratios [NO2]/[OX] and [NO2]/[NOx]vs[NOx]were analyzed in order to firstly, find the fraction of OX which is in the form of NO2 and secondly, the possible source of the local NOx-dependent contribution. Finally, a surface plot study of annual variation of the daily mean oxidant levels, the first of its kind for this polluted area, was completed. This plot may be used to improve the atmospheric photochemical dynamic in this region of the Iberian Peninsula, where there are undeniable air quality problems. |
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