1. Ozone Observations Analyses on Eastern Island La Serena, 22 Nov. 2004 Juan Quintana Dirección Meteorológica de Chile juaquin@meteochile.cl

2. Presentation: Introduction (Campaign 2003) Introduction (Campaign 2003) Typical ozone sounding at Eastern Island Typical ozone sounding at Eastern Island Relevant processes atmospheric observed Relevant processes atmospheric observed Conclusions Conclusions

3. 1 2 3 4

5. Anticiclonic Vorticity and Subsidence Climatological Aspects on Eastern Island Climatological Zonal Wind – Spring (Sep-Nov)

7. Ozone Soundings in Rapanui 1995-2001

8. Ozonosondes: Esatern Island Period: 1995-2001 1500m

9. Cluster groups 1, 2, 3 and 4 38 Soundings 15 Soundings 6 Soundings Ozonosondes: Esatern Island Period: 1995-2001

11. Campaign 2003: Eastern Island

12. Conditions Surface 08 to 13 Nov. 2003 Tº Max. Tº Min. Eastern Island

13. Day 08Day 10 Day 12 Day 09 Day 11 Day 13 Subtropical Jet Stream (m/s), 200 hPa (m/s)

14. Zonal Wind (27°S-109°W)

15. Satelital Image GOES 10 (IR)

16. Sinoptic Configuration 08 to 13 Nov. 2003 Geopotencial Height 500 hPa Day 08Día 10 Día 12 Día 09 Día 11 Día 13 Source: NCEP/NCAR

17. Potencial Vorticity (PV)

20. Wind: Zonal - Meridional

21. Temperature (°C)

22. Tropospheric Ozone 09-13 Nov 2003 Potencial Temperature 09—13 Nov. 2003

23. Eastern Island - Tropopause (hPa)

24. Conclusions Maximun Ozone Tropospheric is observed during Spring in low troposphere and high troposphere on Eastern Island. Maximun Ozone Tropospheric is observed during Spring in low troposphere and high troposphere on Eastern Island. Extratropical cyclones, troughs and Subtropical Jet Stream Intense (>25m/s) favor significant Stratosphere-troposphere exchange (STE). Extratropical cyclones, troughs and Subtropical Jet Stream Intense (>25m/s) favor significant Stratosphere-troposphere exchange (STE). Marine Boundary Layer (MBL) seems to play a role important in tropospheric ozone maximum. Marine Boundary Layer (MBL) seems to play a role important in tropospheric ozone maximum.