DRY DEPOSITION OF SULFUR-DIOXIDE TO LAND AND WATER SURFACES

The direct absorption of sulphur dioxide has been measured in the field by the concentration gradient method and by using **3**5S as a tracer. Laboratory experiments showed that the rate of deposition to soil increased with soil pH. Deposition to calcareous soil, water and short grass was largely controlled by the rate of turbulent mixing, while diffusion into the leaf or the rate of sorption controlled deposition to taller vegetation.