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Long-term time series of water vapour total columns from GOME, SCIAMACHY and GOME-2

Stefan Noël(1), Sebastian Mieruch(1), Heinrich Bovensmann(1) and John P. Burrows(1)

(1) University of Bremen, P. O. Box 330440, D-28334 Bremen, Germany

Abstract

The Air Mass Corrected (AMC-)DOAS method uses the spectral region from 688 to 700 nm to derive water vapour total columns on the global scale. The method has already been successfully applied to measurements of GOME (on ERS-2, since 1995), SCIAMACHY (on ENVISAT, since 2002) and GOME-2 (on MetOp, since 2006). A main feature of the AMC-DOAS method is that it does not rely on external calibration sources (like radio sondes); thus the GOME-type instruments can provide a completely new and independent water vapour data set. Here we present water vapour retrieval results from the three GOME-type instruments, showing that they can be combined to result in a new and independent water vapour total column data base. The combined AMC-DOAS data set covers already now more than 13 years and has already been successfully used for climatological studies. With the planned extension of the SCIAMACHY/ENVISAT mission and the series of MetOp satellites the AMC-DOAS water vapour data set can even be extended until 2020.

 

Workshop presentation