1. Haze Aerosol Pattern over the Pannonia Air Basin Presentation prepared for Joseph Pinto and the US - Hungarian Aerosol Workgroup by Rudolf B. Husar and Janja D. Husar CAPITA, Washington University, St. Louis, MO April 14, 1999

2. Purpose of presentation Strengthening the collaboration in atmospheric aerosol research Illustration of CAPITA research relevant to Hungary Presentation of aerosol pattern over the Panonian Air Basin based on surface visibility data

3. Topography of the Panonia Basin Data point are proportional to BEXT (1.9/Visibility) (Click on the images to see larger version)

4. SeaWiFS Image (truecolor, blue-0.4 micron) Note the mountains sticking out of the shallow winter haze

5. Seasonal maps of light extinction coefficient (1) The winter season has the highest BEXT. (2) The Po River Basin is always hazy (3) The Panonian Air Basin is relatively haze-free, except in the winter

6. Temporal Pattern of Haze at Specific Sites Long-term data (1982-97) shows trends and year-to-year variability Seasonal pattern illustrates the role of weather(precipitation, fog) Diurnal pattern is most influenced by humidity and aerosol sources

7. Long-term pattern

8. Seasonal Pattern

9. Diurnal Pattern

10. Long-term, seasonal and diurnal pattern for Bratislava, Budapest and Vienna

11. Long-term, seasonal, and diurnal pattern for Debrecen and Nagykanizsa

12. Long-term, seasonal, and diurnal pattern for Vienna, Siofok and Satu Mare

13. Long-term, seasonal, and diurnal pattern for Graz and Zagreb