1. Boat experiment Aethalometer data analysis

2. Boat experiment Goals –To detect secondary aerosol originated from the interaction of urban and forest sources, using a movable detection system, to search the best place to measure the Manaus plume.

3. Boat experiment Logistic: 2 boats (measurement and generator boats)

4. Boat experiment General view Maintenance stop

5. Boat experiment Available systems –Gases monitors: NO, NO 2, O 3, H 2 O (v), CO 2 ; –CPC, nephelometer, aethalometer, PICAS-P; –Filter for organics aerosols and VOC’s; –AFG filters –Meteorological station

6. Boat experiment The crew Boat 1: –Scientists : 4 –A cooker, the captain, an electricity technician, and a “make everything” man. Boat 2: –Two mariners total: 10 people

7. Boat experiment Sites:

8. Boat experiment Criteria of these choices of sites –Numerical meteorological forecasting from IAG, CPTEC (and NOAA?): highest probability to find the Manaus plume

9. Boat experiment Results –1 st travel: site at the entrance of Manacapuru lake; –We found the plume.

10. Boat experiment Aethalometer data of site 1(Manacapuru lake)

11. Boat experiment 11-July-01 10-July-01 612 6 18 Local time Boats moving Contamination event

12. Boat experiment –2nd travel: site at the Anavilhanas islands and other points of Negro river; –We found the plume.

13. Boat experiment Aethalometer data of site 2:

14. Boat experiment 16/07/01 17/07/01 6 6 12 18 Local time

15. Boat experiment 18/07/01 19/07/01 6 6 12 18 Local time (hs)

16. Boat experiment 20/07/01 21/07/01 6 6 12 18 Local time

17. Boat experiment 3 rd travel: 26 and 27-July, again at Anavilhanas islands; Too many contaminated data. Despite it, the plume was found.

18. Boat experiment Aethalometer data of 3 rd travel Plume

19. Boat experiment Plume event Plume event?

20. Boat experiment Plume event Plume event?

21. Boat experiment Conclusions: –The plume was clearly found; –There is a need to wait the Max Planck analysis to elucidate the features of the plume.