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| Titel |
Spatially resolved measurements of nitrogen dioxide in an urban environment using concurrent multi-axis differential optical absorption spectroscopy |
| VerfasserIn |
R. J. Leigh, G. K. Corlett, U. Frieß, P. S. Monks |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 18 ; Nr. 7, no. 18 (2007-09-18), S.4751-4762 |
| Datensatznummer |
250005195
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| Publikation (Nr.) |
 copernicus.org/acp-7-4751-2007.pdf |
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| Zusammenfassung |
| A novel system using the technique of concurrent multi-axis
differential optical absorption spectroscopy system has been
developed and applied to the measurement of nitrogen dioxide in an
urban environment. Using five fixed telescopes, slant columns of
nitrogen dioxide, ozone, water vapour, and the oxygen dimer,
O4, are simultaneously retrieved in five vertically separated
viewing directions. The application of this remote sensing technique
in the urban environment is explored. Through the application of
several simplifying assumptions a tropospheric concentration of
NO2 is derived and compared with an urban background
in-situ chemiluminescence detector. Trends derived from
remote sensing and in-situ techniques show agreement to
within 15 to 40% depending on conditions. Owing to the high time
resolution of the measurements, the ability to image and quantify
plumes within the urban environment is demonstrated. The CMAX-DOAS
measurements provide a useful measure of overall NO2
concentrations on a city-wide scale. |
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