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| Titel |
NO2 Profile retrieval using airborne multi axis UV-visible skylight absorption measurements over central Europe |
| VerfasserIn |
M. Bruns, S. A. Buehler, J. P. Burrows, A. Richter, A. Rozanov, P. Wang, K. P. Heue, U. Platt, I. Pundt, T. Wagner |
| 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 ; 6, no. 10 ; Nr. 6, no. 10 (2006-07-24), S.3049-3058 |
| Datensatznummer |
250004015
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| Publikation (Nr.) |
 copernicus.org/acp-6-3049-2006.pdf |
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| Zusammenfassung |
| A recent development in ground-based remote sensing of atmospheric
constituents by UV/visible absorption measurements of scattered
light is the simultaneous use of several directions with small
elevation angles in addition to the traditional zenith-sky
pointing. The different light paths through the atmosphere enable
the vertical distribution of some atmospheric absorbers such as
NO2, BrO or O3 to be retrieved.
In this study, the amount of profile information that can be
retrieved from such measurements on aircraft is investigated for
the trace gas NO2. A Sensitivity study on synthetic data is
performed for a combination of four lines of sight (LOS)
(0°(nadir), 88°, 92°, and
180° (zenith)) and three wavelength regions [center
wavelengths: 362.5 nm, 437.5 nm, and 485.0 nm]. The method used in
this work is a combination of two previously established methods
described in Petritoli et al. (2002) and Wang et al. (2004). The
investigation presented here demonstrates the potential of this
LOS/wavelengths setup to retrieve a significant amount of profile
information from airborne multiax is
differential optical absorption
spectrometer (AMAXDOAS) measurements with a vertical
resolution of 3.0 to 4.5 km in the lower troposphere and 2.0 to
3.5 km near flight altitude. Above 13 km the profile information
content of AMAXDOAS measurements is sparse. The retrieval
algorithm used in this work is the AMAXDOAS
profile retrievalalgorithm (APROVAL).
Further, retrieved profiles with a significant amount (up to
3.2 ppbv) of NO2 in the boundary layer over the Po-valley
(Italy) are presented. Airborne multiaxis measurements are thus a
promising tool for atmospheric studies in the troposphere. |
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