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 region-scale dry deposition processes is developed. The mean ratio between NDDVP and 1022 experimental data of dry deposition velocity Vd is 1.06±0.82. The result shows that NDDVP is well consistent 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 patterns. 3-D distributions of species concentrations and dry depositions forecasted by NDDVP are better than those by the old Vd pattern.