The global variation of CH4 and CO as seen by SCIAMACHY

The methane (CH4) and carbon monoxide (CO) total columns retrieved from SCIAMACHY’s near-infrared channel 8 have been compared to satellite measurements by the MOPITT instrument and chemistry transport model calculations (TM3). Results from the SRON retrieval algorithm IMLM (v5.1) are presented here for the month of February 2004. First results show that these monthly averaged data are in good agreement with TM3 model calculations and the measurements by the MOPITT instrument.