Iterative maximum a posteriori (IMAP)-DOAS for retrieval of strongly absorbing trace gases: Model studies for CH_4 and CO_2 retrieval from near infrared spectra of SCIAMACHY onboard ENVISAT
- Creators
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Frankenberg, C.
- Platt, U.
- Wagner, T.
Abstract
In the past, differential optical absorption spectroscopy (DOAS) has mostly been employed for atmospheric trace gas retrieval in the UV/Vis spectral region. New spectrometers such as SCIAMACHY onboard ENVISAT also provide near infrared channels and thus allow for the detection of greenhouse gases like CH_4, CO_2, or N_2O. However, modifications of the classical DOAS algorithm are necessary to account for the idiosyncrasies of this spectral region, i.e. the temperature and pressure dependence of the high resolution absorption lines. Furthermore, understanding the sensitivity of the measurement of these high resolution, strong absorption lines by means of a non-ideal device, i.e. having finite spectral resolution, is of special importance. This applies not only in the NIR, but can also prove to be an issue for the UV/Vis spectral region.
Additional Information
© 2005 Author(s). This work is licensed under a Creative Commons License. Received: 2 August 2004. Published in Atmos. Chem. Phys. Discuss.: 29 September 2004. Revised: 17 December 2004. Accepted: 23 December 2004. Published: 12 January 2005. Although this study has not yet focussed on actual results of the analysis of SCIAMACHY spectra, the authors wish to thank all people involved in the SCIAMACHY and ENVISAT mission, especially ESA/ESTEC, DLR, SRON and of course the IUP Bremen team of J. P. Burrows without whom SCIAMACHY would not have been possible. For very helpful comments we would like to thank G. C. Toon and H. Bösch from Jet Propulsion Laboratory as well as K. Pfeilsticker from IUP Heidelberg. Edited by: P. MonksAttached Files
Published - acp-5-9-2005.pdf
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Additional details
- Eprint ID
- 57418
- Resolver ID
- CaltechAUTHORS:20150511-131748768
- Created
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2015-05-11Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences