München 2004 – scientific programme

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UP: Umweltphysik

UP 12: Poster: Satelliten und Anwendungen

UP 12.7: Poster

Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3

Water Vapour Column Retrieval from SCIAMACHY — •Stefan Noël, Michael Buchwitz, John P. Burrows, and Kai-Uwe Eichmann — Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany

Global water vapour column amounts have been derived from measurements of the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) on the European environmental satellite ENVISAT. For this purpose, the Air Mass Corrected Differential Absorption Spectroscopy (AMC-DOAS) approach, which was originally designed for GOME, has been applied to SCIAMACHY’s nadir measurements in the near-visible spectral region around 700 nm. The resulting SCIAMACHY total water vapour columns are compared with corresponding SSM/I and ECMWF water vapour data. Taking into account a systematic offset of about 10%, which may be related to the presence of clouds, the SCIAMACHY water vapour results agree well with these correlative data not only over ocean but also over land, thus showing the capability of SCIAMACHY to derive water vapour concentrations on the global scale.