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UP: Umweltphysik
UP 5: Atmosph
ärische Spurengase und Aerosole: Instrumentelles
UP 5.1: Invited Talk
Tuesday, March 14, 2006, 10:00–10:30, E
SCIAMACHY global carbon gas measurements: methane, carbon dioxide, and carbon monoxide — •Michael Buchwitz, Rüdiger de Beek, Stefan Noel, Heinrich Bovensmann, and John Burrows — Institute of Environmental Physics (IUP), University of Bremen FB1, Otto Hahn Allee 1, 28334 Bremen, Germany
The near-infrared nadir spectra of reflected solar radiation measured by SCIAMACHY on-board ENVISAT contain information on the vertical columns of important atmospheric trace gases such as the greenhouse gases carbon dioxide (CO2) and methane (CH4) and the air pollutant carbon monoxide (CO). The scientific algorithm WFM-DOAS has been used to retrieve this information. For CH4 and CO2 our main data products are column averaged mixing ratios (XCH4 and XCO2) determined by simultaneous measurements of the dry air mass (obtained from, e.g., O2). Our CO data product is the CO vertical column. The SCIAMACHY data set is unique because of the high sensitivity of the near-infrared measurements with respect to concentration changes in the atmospheric boundary layer. This is a pre-requisite to get detailed information on regional surface sources and sinks which are currently poorly constrained on the global scale. In this context SCIAMACHY can be regarded as a predecessor of future dedicated satellite carbon missions such as OCO (USA) and GOSAT (Japan). We present the latest results of the data products for CO2, CO, and CH4.