1. TM meeting, KNMI, 12 November 2003 EVERGREEN WP 4200: model intercomparison on transport and chemistry Peter Bergamaschi (JRC IES) Jan Fokke Meirink (KNMI) Stefan Körner / Martin Heimann (MPI) Jean Francois Muller (BIRA IASB)

2. TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – overview 222 Rn SF 6 OH (full chemistry runs) calibration of OH fields single-tracer forwards runs for CH 4 (CO, and CO 2 ?)

3. TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – atmospheric transport / chemistry models NCEP

4. TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – 222Rn protocol constant surface emissions of 1 atom cm -2 s -1 between -60 o S and 60 o N constant surface emissions of 0.5 atom cm -2 s -1 between 60 o N and 70 o N (except Greenland) no temporal variation

5. TM meeting, KNMI, 12 November 2003 222Rn surface June

6. TM meeting, KNMI, 12 November 2003 222Rn 750hPa June

7. TM meeting, KNMI, 12 November 2003 222Rn 500hPa June

8. TM meeting, KNMI, 12 November 2003 222Rn 250hPa June

9. TM meeting, KNMI, 12 November 2003 222Rn latitude vs. altitude June

10. TM meeting, KNMI, 12 November 2003 222Rn latitude vs. altitude December

11. TM meeting, KNMI, 12 November 2003 222Rn Freiburg

12. TM meeting, KNMI, 12 November 2003 222Rn Schauinsland

13. TM meeting, KNMI, 12 November 2003 222Rn Mauna Loa

14. TM meeting, KNMI, 12 November 2003 EVERGREEN WP4200 – SF6 protocol simulation 1994-2001 emissions EDGAR V3.2 SF 6 inventory for 1995 (atmospheric increase 1994-2001 approximately linear) initial field 1994 from MPI (TRANSCOM)

15. TM meeting, KNMI, 12 November 2003 SF6 surface June 2001

16. TM meeting, KNMI, 12 November 2003 SF6 latitude vs. altitude June 2001

17. TM meeting, KNMI, 12 November 2003 SF6 latitude vs. altitude December 2001

18. TM meeting, KNMI, 12 November 2003 SF6 stations

19. TM meeting, KNMI, 12 November 2003 Conclusions 222RN horizontal distribution similar for all 4 models synoptic variabiltity well reproduced by all TM models similar vertical mixing TM3(KNMI) and TM5 TM3(MPI): stronger vertical mixing (exception: TM3(KNMI) / TM5 stronger regional convection in the tropics) significant influence at monitoring stations SF6 significant difference in interhemispheric mixing: TM-models similar, but IMAGES stronger gradient significant difference in troposphere – stratosphere exchange: TM3(KNMI) and TM5(JRC) strongest gradient stratosphere

20. TM meeting, KNMI, 12 November 2003 Outlook Finalisation 222 Rn / SF 6 OH (full chemistry runs) calibration of OH fields single-tracer forwards runs for CH 4, (CO and CO 2 ?)