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| Titel |
Megacity Trends in NO2 from Space and Surface Measurements in the Greater London Area |
| VerfasserIn |
Erika von Schneidemesser, Andreas Hillbol, Paul Monks, Andreas Richter, John Burrows |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053428
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| Zusammenfassung |
| Megacities are increasingly important in terms of human health, climate, and regional air
quality, owing to their high population densities and concentrated emission sources. Nitrogen
dioxide (NO2) is an important tropospheric air pollutant that has anthropogenic and natural
sources, in large part dominated by fossil fuel combustion from industry and vehicles in
urban areas. NO2 plays an important role in the formation of ozone and the oxidizing
capacity of the atmosphere. With this work data from an extensive set of surface-level
monitoring stations, as well as from four satellites, were used to investigate the sensitivity of
satellites to capture NO2 trends on an urban scale.
Data from over 100 NO2 monitoring sites in and around the Greater London megacity area
were examined for trends during the 1996 to 2010 period. NO2 data from the GOME,
SCIAMACHY, GOME2, and OMI satellite instruments were also analyzed for trends.
Monitoring data were filtered by increasingly limiting filters to facilitate comparison with
satellite data, including year, date, and overpass time corresponding to available satellite data.
Data and trends were also investigated for seasonal patterns and weekday versus weekend
trends. Classification of monitoring sites were taken into account, to see if satellite data were
more representative of e.g. roadside or urban background monitoring site data. Spatial
patterns in the data were analyzed and compared to spatial distributions of emission inventory
data. |
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