1. Recent developments in near- infrared retrievals of CH 4 and CO Christian Frankenberg, Annemieke Gloudemans, Jos de Laat, Hans Schrijver

2. 2 CH 4 from channel 6 New methane spectroscopic parameters in the NIR available New methane spectroscopic parameters in the NIR available Atmospheric water vapour detected to be a crucial error source Atmospheric water vapour detected to be a crucial error source   Seasonal bias over Australia resolved Tropical enhancements not as high as previous inversions suggested Tropical enhancements not as high as previous inversions suggested Inversions still point at underestimated tropical sources but are more consistent with the ground-based network Inversions still point at underestimated tropical sources but are more consistent with the ground-based network

3. 3 Methane spectroscopy, the 2ν 3 band Frankenberg et al, submitted to ACPD

4. 4 Multi-spectra fit, results for the Q-Branch Frankenberg et al, submitted to ACPD

5. 5 High resolution FTIR retrievals as a test-bed Frankenberg et al, submitted to ACPD

6. 6 Errors in water spectroscopy

7. 7 Atmospheric water vapor Implication on SCIA CH 4 retrievals Frankenberg et al, submitted to GRL About 20-40ppb difference Frankenberg et al, Science, 2005

8. 8 Implications on SCIAMACHY retrievals Frankenberg et al, submitted to ACPD Seasonal bias of about 1%

9. 9 Atmospheric water vapour Implication on SCIA CH 4 retrievals Frankenberg et al, submitted to GRL Optimised treatment of water absorptions

10. 10 CO retrievals (channel 8) ‏ Results from R branch (less interference from water lines) ‏ Results from R branch (less interference from water lines) ‏ Developments: Developments: Results extended to 2006 Results extended to 2006 2007 will be started soon; many pixels die in that year! 2007 will be started soon; many pixels die in that year! Improvements in spectroscopy of water and methane Improvements in spectroscopy of water and methane Coming improved correction for scattering by ice layer (?) ‏ Coming improved correction for scattering by ice layer (?) ‏

11. 11 Monthly averages April 2003 - 2006

12. 12 Improvements in spectroscopy (line broadening) ‏ HITRAN Janouvrier et al 2007 (H 2 O), Predoi-Cross et al 2006 (CH 4 ) ‏

13. 13 Improvement in error statistics Standard deviation SCIA – TM5 for old (blue) and new (black) spectroscopy Average difference (bias) SCIA – TM5 for old (blue) and new (black) spectroscopy