Methane columns from SCIAMACHY

Methane columns from SCIAMACHY

The SCIAMACHY/ENVISAT near-infrared / short wave infrared (NIR/SWIR) nadir spectra of reflected and backscattered solar radiation contain information on the column-averaged dry air mole fraction of methane (CH₄), denoted XCH4. At the University of Bremen we retrieve this information using a modified DOAS algorithm called WFM-DOAS. The latest version of our XCH4 retrieval algorithm is WFM-DOAS version 1.0. So far we have processed three years of data (2003-2005).

Latest results

XCH4 SCIAMACHY Aug 2003	XCH4 SCIAMACHY Sep 2003

Archives

Documentation

Product:

• Link to product specification document: PDF file
• Link to format description: PDF file
• Link to University of Bremen WFM-DOAS main page: WFM-DOAS main page
• Links to other relevant documents: List of publications

Validation

• Dils, B., De Maziere, M., Blumenstock, T., Hase, F., Kramer, I., Mahieu, E., Demoulin, P., Duchatelet, P., Mellqvist, J., Strandberg, A., Buchwitz, M., Khlystova, I., Schneising, O., Velazco, V., Notholt, J., Sussmann, R., and Stremme, W., Validation of WFM-DOAS v0.6 CO and v1.0 CH4 scientific products using European ground-based FTIR measurements, proceedings of the Third Workshop on the Atmospheric Chemistry Validation of ENVISAT (ACVE-3), 4-7 Dec. 2006, ESA/ESRIN, Frascati, Italy, ESA Publications Division Special Publication SP-642 (CD), 2006. (PDF file )
• Schneising, O., M. Buchwitz, J. P. Burrows, et al., Three years of greenhouse gas column-averaged dry air mole fractions retrieved from satellite - Part 2: Methane, manuscript in preparation, 2007b.
• Previous version: Dils et al., Comparison between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2, and N2O, Atmos. Chem. Phys., 6, 1953-1976, 2006. ( PDF file )
• See also: List of publications

Background information

Main references:

Buchwitz, M., I. Khlystova, O. Schneising, H. Bovensmann, J. P. Burrows, SCIAMACHY/WFM-DOAS tropospheric CO, CH4, and CO2 scientific data products: Validation and recent developments, proceedings of the Third Workshop on the Atmospheric Chemistry Validation of ENVISAT (ACVE-3), 4-7 Dec. 2006, ESA/ESRIN, Frascati, Italy, ESA Publications Division Special Publication SP-642 (CD), 2006. (PDF file )

Buchwitz, M., R. de Beek, S. Noël, J. P. Burrows, H. Bovensmann, O. Schneising, I. Khlystova, M. Bruns, H. Bremer, P. Bergamaschi, S. Körner, M. Heimann, Atmospheric carbon gases retrieved from SCIAMACHY by WFM-DOAS: version 0.5 CO and CH4 and impact of calibration improvements on CO2 retrieval, Atmos. Chem. Phys., 6, 2727-2751, 2006. (PDF file )

Acknowledgements

  This work is being or has been funded by the BMBF (German "Bundesministerium für Bildung und Forschung") via DLR-Bonn, the State of Bremen and the University of Bremen, and ESA via GMES/PROMOTE.

Michael Buchwitz, last modification: 12 June 2007