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| Titel |
Shipborne solar absorption measurements of CO2, CH4, N2O and CO and comparison with SCIAMACHY WFM-DOAS retrievals |
| VerfasserIn |
T. Warneke, R. Beek, M. Buchwitz, J. Notholt, A. Schulz, V. Velazco, O. Schrems |
| 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 ; 5, no. 8 ; Nr. 5, no. 8 (2005-08-05), S.2029-2034 |
| Datensatznummer |
250003022
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| Publikation (Nr.) |
 copernicus.org/acp-5-2029-2005.pdf |
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| Zusammenfassung |
| CO, CH4, N2O and CO2 were retrieved from high resolution
solar absorption spectra obtained during a ship cruise from Capetown to
Bremerhaven in January/February 2003 by Fourier Transform Infrared (FTIR)
spectroscopy. Precisions of better than 0.5% for the column averaged
volume mixing ratios (VMR) of CH4 and CO2 are achieved using of
O2 as a reference gas. Shipborne FTIR-measurements of CO and data from
SCIAMACHY/ENVISAT retrieved by the Weighting Function Modified Differential
Optical Absorption Spectroscopy (WFM-DOAS) retrieval algorithm show
qualitatively the same latitudinal variations. WFM-DOAS data of CH4,
N2O and CO2 measured over sea exhibit a great spread. The spread
is significantly reduced for satellite measurements over land and a
reasonable agreement can be obtained if the shipborne data are compared with
the closest SCIAMACHY measurements over land. The number of comparisons is
too small to draw conclusions. However, by including only WFM-DOAS data with
small errors the shipborne and WFM-DOAS data compare within 5% for
CH4 and CO2 and within 30% for N2O. |
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