1. “Toward a More Efficient Transboundary Exchange of Air Quality Data” Rich PoirotVermont Cliff Michaelsen Maine

2. Acknowledgments n Paul Wishinski / State of Vermont DEC n Stefan Falke / CAPITA, Washington Univ. n Brett Schichtel / CAPITA, Washington Univ. n Rudy Husar / CAPITA, Washington Univ. n Jeff Brook / AES, Environment Canada n David Waugh / DOE, AESBED n Steve Beauchamp / DOE, AESBED n Ray Hoff / AES, Environment Canada Many Thanks to the Following Folks For Their Contributions to This Effort:

3. Arsenic Episodes of 1989 Ozone Episode of July 1994 Mixed Pollutants In August 1992

4. Atmospheric Flow Visualization: CAPITA Monte Carlo Model (see Movie: USFLW792.AVI, provided by Brett Schichtel, CAPITA)

8. Day 1 12/23/89 Yellow Day 2 11/04/89 Green Day 3 2/04/89 Red Sudbury Noranda HY-SPLIT / NGM Trajectories arriving at 3 PM for Underhill, Vermont

9. Back Trajectories from Ontario Sites on Days with High Arsenic/Selenium Ratios: 1988-92 Provided by Ray Hoff, Atmospheric Environment Service, Environment Canada

10. HY-SPLIT / NGM Trajectories arriving at 3 AM for Underhill, Vermont Day 1 12/23/89 Yellow Day 2 11/04/89 Green Day 3 2/04/89 Red Day 4 3/22/89 Purple Norand a Sudbury

16. US/Canadian Data Interface Airs (with Voyager) AESCanada AES Downsview transfers data Into EXCEL Decompile AIRS Data Decompile Manipulate in EXCEL Manipulate Merge in ACCESS ACCESS Re-compile into a Voyager file Re-compile into a Voyager file Ready to Use Canadian/USAData Canadian/USAData

17. Hourly Ozone and Surface Winds : 7/19-23/94 (see Movie SCOTIA3.AVI)

18. HY-SPLIT / NGM Trajectories arriving at 9 PM on July 21, 1994 at the following locations: North Cape, PEIGreen Acadia NP, Me.Red Cape Elizabeth, MePurple

19. HY-SPLIT / NGM Trajectories arriving at 3 PM on July 20, 1994 at the following locations : North Cape, PEIGreen Acadia NP, Me.Red Cape Elizabeth, MePurple

20. 3 PM Ozone, 24 hour PM-10 and Sulfate on August 28, 1992 (see Movie: PMOZSU92.AVI)

21. 6 Days earlier, on August 22, 1992, maximum concentrations of afternoon Ozone and daily PM-10 and Sulfate were centered in the Midwestern US

23. Windsor Toronto Montreal Kejimkujik Fine Particle Mass and Sulfate (blue) at 4 Canadian Sites on August 23 - 27, 1992 Data Provided by: Jeff Brook, AES Environment Canada

25. HY-SPLIT / NGM Trajectories arriving at 3 PM on the following dates for 4 sites: Red - Windsor8/23/92 Pink - Toronto8/24/92 Green - Montreal 8/25/92 Yellow - Keji8/26/92 Keji Montreal Toronto Windsor

26. HY-SPLIT / NGM Trajectories arriving at 3 PM at the following sites on 08/27/92: Windsor, Ont.Purple Toronto, Ont.Lt. Purple Montreal, Que.Red Kejimkujik, N.S.Green Toronto Windsor Montreal Keji

28. NEPART Fine Particle Mass, Sulfate and "Acidity" on 8/28/92 with Air Mass Histories from the CAPITA Monte Carlo Model

29. Conclusions n We Examined 3 Episodes of Transboundary Pollution Transport n Assumed We Understood These Episodes in Advance n Assumed it would be Easy To Merge US & Canadian Data Both Assumptions Were Wrong! We Efficiently Exchange Air Pollution Across our Border, Where it is Merged with Local Source Influences, but is Too Often Unobserved, Undocumented, and Uncontrolled We Need More Efficient Mechanisms to Exchange and Merge our Collective Air Quality Data!