Frankenberg, C. and Platt, U. and Wagner, T. (2005) Retrieval of CO from SCIAMACHY onboard ENVISAT: detection of strongly polluted areas and seasonal patterns in global CO abundances. Atmospheric Chemistry and Physics, 5 (6). pp. 1637-1644. ISSN 1680-7316. doi:10.5194/acp-5-1639-2005. https://resolver.caltech.edu/CaltechAUTHORS:20150508-161821318
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Abstract
SCIAMACHY onboard the European environmental research satellite ENVISAT is an UV/visible/near-infrared spectrometer providing 3 near infrared channels covering wavelengths from 1-1.75 µm, 1.94-2.04 µm and 2.26-2.38 µm with moderate spectral resolution (0.22-1.5nm). From their structured absorption in these spectral regions, we can quantitatively determine the total column densities of the greenhouse gases CO_2, CH_4, N_2O and H_2O as well as of CO. A modified DOAS algorithm based on optimal estimation (IMAP-DOAS) has been developed at the University of Heidelberg to account for the peculiarities of these absorbers. CO is a relatively weak absorber whose spectral signature is overlapped by strong CH_4 and H_2O absorptions. Hence, retrieval of CO from SCIAMACHY spectra (within 2.26-2.38 µm) is a challenging task. Therefore, the calibration of the raw spectra with respect to dark current issues and nonlinearity were analysed in detail and substantially improved to enable reasonable retrieval of CO. This paper focusses on first results of the CO retrieval where various sources like biomass burning events and their seasonal variability can be clearly identified.
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| Additional Information: | © Author(s) 2005. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. Received: 2 November 2004; Published in Atmos. Chem. Phys. Discuss.: 20 December 2004 Revised: 29 March 2005; Accepted: 9 May 2005; Published: 27 June 2005. The authors wish to thank all people involved in the SCIAMACHY and ENVISAT mission, especially ESA/ESTEC, DLR, SRON, KNMI and of course the IUP Bremen team, especially J. P. Burrows without whom SCIAMACHY would not have been possible. We are also very grateful to A. Piters and J. van de Vegte from KNMI for their immense help in handling SCIAMACHY data. | |||||||||
| Issue or Number: | 6 | |||||||||
| DOI: | 10.5194/acp-5-1639-2005 | |||||||||
| Record Number: | CaltechAUTHORS:20150508-161821318 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150508-161821318 | |||||||||
| Official Citation: | Frankenberg, C., Platt, U., and Wagner, T.: Retrieval of CO from SCIAMACHY onboard ENVISAT: detection of strongly polluted areas and seasonal patterns in global CO abundances, Atmos. Chem. Phys., 5, 1639-1644, doi:10.5194/acp-5-1639-2005, 2005. | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 57393 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | INVALID USER | |||||||||
| Deposited On: | 11 May 2015 21:29 | |||||||||
| Last Modified: | 10 Nov 2021 21:12 |
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