A NEW DRY DEPOSITION VELOCITY PATTERN AND ITS PRACTICAL APPLICATION IN HIGH RESOLUTION REGIONAL ACID DEPOSITION MODEL

A new dry deposition velocity pattern(NDDVP) for the study of regional scale dry deposition processes is developed. The mean ratio between NDDVP and 1022 experimental data of dry deposition velocityVd is 1.06±0.82. The result shows that NDDVP consist well with experimental data. Practical cases are forecasted by the high resolution regional acid deposition model(EM3).with both NDDVP and old Vd pattern. The maximum ratio between the central concentrations for SO4-;can reach 2.4 only due to different Vd pattern. 3-D distributions of species concentrations and dry deposition are forecasted by NDDVP better than by the old Vd pattern.