Atmospheric transport and transformation rate of sulfur dioxide

Pollutants immission episodes are monitored in a semi-rural area of Belgium. The responsibility for the episodes is attributed to more or less distant industrial zones. Sulfur dioxide to sulfate conversion is studied as a function of transfer duration between the industrial sources and the immission site. Ambient temperatures, mixing heights and deposition velocities seem to be the main parameters likely to influence the conversion rates which have been estimated at 0.020 h/sup -1/ at 0 degrees C up to 0.040 h/sup -1/ at 20 degrees C, with a global activation of 5.7 kcal. mole/sup -1/.