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| Titel |
Weekend effect of O3, NO, NO2, CO and PM10 concentrations in the south of Spain during 2003-2008 |
| VerfasserIn |
Jose Antonio Adame Carnero, Antonio Lozano, Mar Sorribas, Juan Contreras, Miguel Angel Hernández-Ceballos, Francisca Godoy, Mercedes Fernández-León, Juan Pedro Bolívar, Benito A. De la Morena |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250038563
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| Zusammenfassung |
| The weekly evolutions and the difference between labour and non-labour days for O3, NO,
NO2, CO and PM10 concentrations have been analysed in the south of Spain (Andalusia).
The hourly data have been collected in 70 stations (urban, suburban and rural) belong to the
Air Quality Network of Andalusia. The data period used was 2003-2008. The study has been
focused in order to identify the weekend effect for those pollutants. The weekly patterns has
been evaluated using daily mean of O3 and CO and 90th percentile daily values of NO, NO2
and PM10. The mean daily ozone concentrations show similar values during the week days
with a maximum increase of the concentrations during weekend days of 5 μg m-3 in urban
stations. The NO and NO2 levels present in general a decrease of 90th percentile
daily values during weekend days. The maximum decrease observed was of 50
and 25 μg m-3 for NO and NO2 respectively. The most of stations show similar
concentrations for the mean daily CO levels during the week. In the event of PM10 while
some stations present an increase of the concentrations during the weekdays others
have similar values during all days with 90th percentile of 45 μg m-3. The daily
pollutants variation between week and weekend days has been evaluated from the
hourly differences between weekend and week concentrations. The ozone daily
evolution show negative differences from 00:00 to 5:00 local time (LT) while during
the rest of the day the differences are positives. The maximum differences were
registered early in the morning ranging between 4 μg m-3 for rural stations to 14 μg
m-3 for urban stations. The NO and NO2 show positive differences between 00:00
to 7:00 (LT) with negative values within the next hours. The higher differences
could reach 80 μg m-3 for NO and 25 μg m-3 for NO2, both in urban stations,
with values lower than 10 μg m-3and 5 μg m-3 in suburban and rural stations
respectively. The CO daily evolution show similar values in week and weekend days.
The behaviour of the PM10 daily differences is similar to the observed for NO
and NO2, with higher differences between 10:00 to 14:00 and values between 5
to 20 μg m-3. The results obtained in this work point out a weak or absence for
weekend effect of O3 and CO concentrations over the study area. Nevertheless, for
NO, NO2 and PM10 concentrations present a decrease during the weekend. This
phenomenon has been observed with more intensity over the metropolitan areas,
mainly in urban stations. The results obtained in this study are being used to define
the air quality plans in the south of Spain. These plans will start to apply during
2010 with the purpose to reduce the levels of these air pollutants in Andalusia. |
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