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| Titel |
Effects of a sea breeze discontinuity on air quality in an industrial coastal environment of the North Sea |
| VerfasserIn |
Patrick Augustin, Anton Sokolov, Charles Talbot, Marc Fourmentin, Véronique Willart, Hervé Delbarre |
| 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 |
250034585
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| Zusammenfassung |
| The effects of interaction between the sea breeze and synoptic wind on air pollutants have
been studied in an industrial coastal environment of the North Sea. These effects have
been investigated, during one day, using ground-based remote sensing systems and
surface station data alongside with mesoscale modelling outputs. During a campaign
in the North of France, continuous lidar measurements documented the structure
and the evolution of the lower troposphere. The combination of lidar, sodar and
surface station observations showed that the atmospheric boundary layer is well
stratified during the night, with a stable double layer structure which slows the
growing process of the mixing layer, in the morning and before the sea-breeze
onset.
During the day, we observed discontinuity in meteorological measurements due to the
sea-breeze occurrences. We have found that these sudden changes were well correlated with
high concentrations of sulphur dioxide at ground level (up to 400 μg/m3). The
first sea breeze puff generates a change of the structure of the lower troposphere
with a coupling between the residual layer and the convective boundary layer. The
discontinuity of the sea-breeze gravity current is well observed by lidar signals and sodar
echo.
The analysis revealed that the impacts of the sea-breeze discontinuity have significant
implications on the local and the regional pollution above industrialized areas. This
phenomenon triggers important changes on the local and regional air quality, more
particularly in urban and industrial coastal localities. |
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