Heidelberg 2006 – wissenschaftliches Programm

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UP: Umweltphysik

UP 5: Atmosph
ärische Spurengase und Aerosole: Instrumentelles

UP 5.1: Hauptvortrag

Dienstag, 14. März 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.