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| Titel |
Retrieval interval mapping: a tool to visualize the impact of the spectral retrieval range on differential optical absorption spectroscopy evaluations |
| VerfasserIn |
L. Vogel, H. Sihler, J. Lampel, T. Wagner, U. Platt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 2 ; Nr. 6, no. 2 (2013-02-07), S.275-299 |
| Datensatznummer |
250017389
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| Publikation (Nr.) |
 copernicus.org/amt-6-275-2013.pdf |
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| Zusammenfassung |
Remote sensing via differential optical absorption spectroscopy
(DOAS) has become a standard technique to identify and quantify trace gases
in the atmosphere. Due to the wide range of measurement conditions,
atmospheric compositions and instruments used, a specific challenge of a DOAS
retrieval is to optimize the retrieval parameters for each specific case and
particular trace gas of interest. Of these parameters, the retrieval
wavelength range is one of the most important ones.
Although for many trace gases the overall dependence of common DOAS retrieval on the
evaluation wavelength interval is known, a systematic approach for finding the optimal
retrieval wavelength range and quantitative assessment is missing. Here we present a
novel tool to visualize the effect of different evaluation wavelength ranges. It is
based on mapping retrieved column densities in the retrieval wavelength space and thus
visualizing the consequences of different choices of spectral retrieval ranges caused
by slightly erroneous absorption cross sections, cross correlations and instrumental
features. Based on the information gathered, an optimal retrieval wavelength range
may be determined systematically.
The technique is demonstrated using examples of a theoretical study of BrO
retrievals for stratospheric BrO and BrO measurements in volcanic plumes.
However, due to the general nature of the tool, it is applicable to any type
of DOAS retrieval (active or passive). |
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