1 / 15

Spatial and temporal distributions of water vapour in the UTLS as observed with MIPAS/Envisat

Spatial and temporal distributions of water vapour in the UTLS as observed with MIPAS/Envisat. M.Milz for the IMK/IAA-MIPAS-Team. Outline. IMK water vapour products Seasonal distributions Interannual differences Timeseries Conclusion. IMK/IAA Retrievals.

caldwell-whitfield
Download Presentation

Spatial and temporal distributions of water vapour in the UTLS as observed with MIPAS/Envisat

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

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

  3. 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 Atmospheric Science Conference, ESA-ESRIN, 2006

  4. 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. Atmospheric Science Conference, ESA-ESRIN, 2006

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

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

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

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

  9. Interannual differences H2O, September 2002 H2O, September 2003 6 ppmv Split Vortex 2002! 2 ppmv Atmospheric Science Conference, ESA-ESRIN, 2006

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

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

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

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

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

  15. 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 Atmospheric Science Conference, ESA-ESRIN, 2006

More Related