Berlin 2005 – scientific programme

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UP: Umweltphysik

UP 6: Poster: Aerosole

UP 6.14: Poster

Tuesday, March 8, 2005, 10:15–12:15, Poster TU HTF

Validation of ENVISAT/SCIAMACHY scientific retrievals of CO by solar FTIR at the Ground Truthing Station Zugspitze — •Ralf Sussmann¹, Wolfgang Stremme¹, Alexander Rockmann¹, Markus Rettinger¹, Michael Buchwitz², and Rüdiger de Beek² — ¹Forschungszentrum Karlsruhe, IMK-IFU, Garmisch-Partenkirchen — ²Universität Bremen, Institut für Umweltphysik

CO profile retrievals from ground-based FTIR measurements at the Ground Truthing Station Zugspitze (47^∘ N, 11^∘ E, 2964 m asl.), Germany are used to validate columnar CO retrieved from SCIAMACHY spectra (WFM-DOAS v0.4). The WFM-DOAS retrievals of CO include an empirical column scaling factor of 0.5. Therefore, not absolute column levels are validated, but the response of the SCIAMACHY retrievals to the atmospheric inter-annual variability is quantitatively assessed in comparison to the Zugspitze FTIR results. Although CO WFM-DOAS data show a significant scatter, it is possible to retrieve information on the CO annual cycle (≈ 10 % amplitude) in a statistically significant fit. This can be achieved by averaging all SCIAMACHY pixels within a certain minimum radius around the Zugspitze for each day.