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UP: Fachverband Umweltphysik

UP 4: Postersession

UP 4.15: Poster

Dienstag, 26. Februar 2013, 17:15–18:30, Poster EG

Tropospheric trace gas mapping by airborne imaging DOAS — •Anja Schönhardt, Patricia Altube, Andreas Richter, Sven Krautwurst, Konstantin Gerilowski, and John P. Burrows — Institut für Umweltphysik, Universität Bremen

Aircraft remote sensing measurements are a valuable tool for measurements and mapping of tropospheric trace gases. The presented imaging DOAS instrument is specifically built for airborne applications and is used for observations of anthropogenic nitrogen dioxide, NO₂.
Viewing in nadir geometry, tropospheric column amounts of the retrieved trace gases are determined. Radiation from within about 50 degrees opening angle across track is recorded simultaneously. Taking the aircraft position angles into account, the geolocation of each individual observed scene is corrected and thus determined with high accuracy. Spectral and spatial resolution of the instrument is of good quality and allows trace gas mapping on a spatial sale of 100m.
The determination of NO₂ emission fluxes from a power plant exhaust plume is performed based on the Gaussian plume model. Results from research flights covering different areas with anthropogenic pollution sources are presented.