1. Welcome to the COST 723 Meeting! Bern, October 6-7, 2003

2. COST 723 WG1 Meeting 1, Common Session WG1 + MC Bern, October 6-7, 2003 Stefan Buehler University of Bremen sbuehler@uni-bremen.de

3. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 3 Overall Activities Delay due to COST move to ESF Web site and mailing lists at http://www.cost723.org http://www.cost723.org COST 723 splinter meeting at EGS/Nice –Opening Workshop planned at ESTEC –Date (to be reconfirmed at this meeting): March 11-13, 2004 –Collection of COST 723 related EGS presentations on cost723.org

4. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 4 WG1 Activities –Radiosonde Humidity Ozone –Aircraft MOZAIC MARSCHALS –Satellite AMSU Odin Envisat Champ Established contacts to data sources: We will learn about ongoing activities in these areas in the next two days (hopefully).

5. AMSU-B Humidity Data Stefan Buehler University of Bremen

6. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 6 Platform InstrumentLaunch DMSP F-13SSM-T2 March 95 DMSP F-14 SSM-T2 April 97 NOAA-15 (NOAA-K) AMSU-B May 1998 NOAA-16 (NOAA-L) AMSU-B September 2000 NOAA-17 (NOAA-M) AMSU-B June 2002 Aqua HSB May 2002 Operational Microwave Humidity Data

7. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 7 Figure by M. Kuvatov

8. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 8 AMSUBChannelsAMSUBChannels Figure by V. Oommen-John

9. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 9 Wettest day in 2002 (July 17) Driest day in 2002 (January 5) Peak altitude of Jacobians gives sounding altitude Figure by V. Oommen-John

10. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 10 Wettest day in 2002 (July 17) Driest day in 2002 (January 5) Lindenberg Radiosonde Data Solid: RH, dashed T, dotted RH_icesat Figure by M. Kuvatov

11. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 11 Match-up Procedure Problems: –Sonde drifts during ascent –Time difference between sonde launch and overpass  Pixel level comparison not possible Figure by V. Oommen-John

12. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 12 Solution: Look at a target area, we take a 50km circle. Striking: Atmospheric inhomogeneity can be a problem. Figure by M. Kuvatov

13. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 13 Number of Occurrences Standard deviation of brightness temperatures inside the target area. Vertical lines are from operational calibration. Figure by V. Oommen-John

14. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 14 Error Model The 50km inhomogeneity is the dominant error source. Error model:  i = C 0 +  50km C 0 is small, we take 0.5K.

15. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 15 Comparison Lindenberg radiosonde humidity vs. AMSU- B on NOAA15, time period 2002. Discrepancies in the UT for very dry conditions. Figure by M. Kuvatov

16. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 16 Radiosonde Stations in COST 723 Countries (from Met Office Archive) Figure by V. Oommen-John

17. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 17 Satellite Data as a Tool to Compare Different Stations Lindenberg / Germany (Vaisala RS80) Kem / Russia (Goldbeater skin) Figure by V. Oommen-John

18. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 18 Conclusions It is worthwhile to compare operational satellite humidity data and radiosondes. Comparison in radiance space avoids inverse problem. A good match-up methodology is crucial. Tests consistency of: RT Model Satellite Data Radiosonde Data

19. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 19 Draft Workshop Program, Day 1 Thu. March 11, 200414:00Welcome, agenda, etc. 14:30Session 1: UTLS Data sources 14:30Presentation 15:00Presentation 15:30Coffee break 16:00Presentation 16:30Presentation 17:00Presentation 17:30Close 19:00Joint dinner

20. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 20 Draft Workshop Program, Day 2 Fri. March 12, 200409:00Session 2: Data assimilation 09:00Presentation 09:30Presentation 10:00Coffee break 10:30Presentation 11:00Presentation 11:30Presentation 12:00Lunch 14:00Session 3: Data interpretation and scientific studies 14:00Presentation 14:30Presentation 15:00Presentation 15:30Coffee break 16:00Presentation 16:30Presentation 17:00Close

21. Bern, 6.-7. 10. 2003COST 723 WG1 Meeting 1Stefan Buehler 21 Draft Workshop Program, Day 3 Sat. March 13, 200409:00WG work in 3 parallel sessions WG 1 WG 2 WG 3 12:00Lunch 13:30Joint session, WG reports and discussion WG 1 WG 2 WG 3 16:00Close Do we also have to put in a short MC Meeting? When?