1. Atmospheric Science Conference, ESA-ESRIN, 2006 Spatial and temporal distributions of water vapour in the UTLS as observed with MIPAS/Envisat M.Milz for the IMK/IAA-MIPAS- Team

2. Atmospheric Science Conference, ESA-ESRIN, 2006 Outline  IMK water vapour products  Seasonal distributions  Interannual differences  Timeseries  Conclusion

3. Atmospheric Science Conference, ESA-ESRIN, 2006 IMK/IAA Retrievals  Scientific processor, independent from ESA level 2 processing  Different retrieval approach  Fixed altitude grid, finer than tangent altitude spacing - Regularization (Tikhonov-Phillips)  Retrieval of additional parameters beyond ESA standard products

4. Atmospheric Science Conference, ESA-ESRIN, 2006 IMK/IAA Retrievals  Presented results are based on reprocessed Level 1b data (improved spectra quality)  sophisticated retrieval baselines, based on experience gained with NRT spectra.  baselines consistent for all results  consistent data from Sep 2002 until March 2004  approximately 1 complete day processed ever 10 days.

5. Atmospheric Science Conference, ESA-ESRIN, 2006 Water Vapour Baseline version H2O_11 –Improved microwindow set –Relaxed regularization than previous products (increased vertical resolution) –Consistent pre-retrieved shift and temperature products

6. Atmospheric Science Conference, ESA-ESRIN, 2006 Seasonal distributions January 2003 July 2003 April 2003 September 2003 6 ppmv 2 ppmv

7. Atmospheric Science Conference, ESA-ESRIN, 2006 Seasonal distributions September 2003 April 2003 July 2003 January 2003 10 ppmv 0 ppmv

8. Atmospheric Science Conference, ESA-ESRIN, 2006 July 2003

9. Atmospheric Science Conference, ESA-ESRIN, 2006 Interannual differences Split Vortex 2002! H 2 O, September 2002H 2 O, September 2003 2 ppmv 6 ppmv

10. Atmospheric Science Conference, ESA-ESRIN, 2006 Interannual differences II T, September 2002 T, September 2003 180 K 230 K

11. Atmospheric Science Conference, ESA-ESRIN, 2006 Interannual differences II

12. Atmospheric Science Conference, ESA-ESRIN, 2006 Timeseries Oct. 02 Mar. 04

13. Atmospheric Science Conference, ESA-ESRIN, 2006 Timeseries Dehydration Mesospheric Air

14. Atmospheric Science Conference, ESA-ESRIN, 2006 Timeseries Split Vortex 2002

15. Atmospheric Science Conference, ESA-ESRIN, 2006 Conclusion  Seasonal differences and peculiarities in water vapour distributions were observed  Increased H2O vmr around 30-40° N during July can be attributed to the Indian Monsoon region  Interannual differences for September (2002 vs. 2003) are clearly visible  Temporal evolution of water vapour fields show a clear tape-recorder signal in the tropics and subsidence over South Pole  The IMK/IAA water vapour data set provides accurate data for analysis of initial 18 months of MIPAS measurements