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| Titel |
Aircraft imaging DOAS measurements of anthropogenic nitrogen dioxide |
| VerfasserIn |
Anja Schoenhardt, Andreas Richter, Patricia Altube, Konstantin Gerilowski, Sven Krautwurst, John P. Burrows |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078496
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| Zusammenfassung |
| Aircraft based observations of NO2 columns have been conducted using an imaging
spectrometer. NO2 column amounts below the aircraft are retrieved from scattered light
measurements by Differential Optical Absorption Spectroscopy (DOAS). These imaging
DOAS observations provide information about abundances and emissions of trace gases on a
fine spatial scale of around 100m, which is suitable for investigations of anthropogenic point
sources. With its wide angle entrance optics, the instrument is designed to yield simultaneous
observations for all viewing angles within a broad swath below the aircraft across flight
direction. In addition, the specific detector design allows gap free measurements
along flight direction. These instrument characteristics provide best conditions for
trace gas mapping. Source strengths and source distributions can be derived from
the measurements. In addition, such NO2 observational data is useful for model
input, model comparisons, satellite validation, and the investigation of sub-pixel
variability.
Instrumental performance has been analysed as well as the influences of aircraft positioning
angles, viewing geometry and ground surface albedo on the retrieval results. Results and
investigations from aircraft measurements above several anthropogenic source regions are
presented. |
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