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Sciamachy WFM-DOAS XCO2: Reduction of scattering related errors

Heymann, J.; Bovensmann, H.; Buchwitz, M.; Burrows, J. P.; Deutscher, N. M.; Notholt, J.; Rettinger, M.; Reuter, M.; Schneising, O.; Sussmann, R.; Warneke, T.

Abstract (englisch):
Abstract. Global observations of column-averaged dry air mole fractions of carbon dioxide (CO2), denoted by XCO2 , retrieved from SCIAMACHY on-board ENVISAT can provide important and missing global information on the distribution and magnitude of regional CO2 surface fluxes. This application has challenging precision and accuracy requirements.

In a previous publication (Heymann et al., 2012), it has been shown by analysing seven years of SCIAMACHY WFM-DOAS XCO2 (WFMDv2.1) that unaccounted thin cirrus clouds can result in significant errors.

In order to enhance the quality of the SCIAMACHY XCO2 data product, we have developed a new version of the retrieval algorithm (WFMDv2.2), which is described in this manuscript. It is based on an improved cloud filtering and correction method using the 1.4 μm strong water vapour absorption and 0.76 μm O2-A bands. The new algorithm has been used to generate a SCIAMACHY XCO2 data set covering the years 2003–2009.

The new XCO2 data set has been validated using ground-based observations from the Total Carbon Column Observing Network (TCCON). The validation shows a significant improvement of ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2012
Sprache Englisch
Identifikator DOI: 10.5194/amt-5-2375-2012
ISSN: 1867-1381
URN: urn:nbn:de:swb:90-603321
KITopen ID: 1000060332
HGF-Programm 12.03.01; LK 01
Erschienen in Atmospheric measurement techniques
Band 5
Heft 10
Seiten 2375-2390
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