一个新的干沉积速度型及其在高分辨区域酸沉积模式中的应用

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

为研究区域尺度干沉积过程，发展了一新的干沉积速度型（ＮＤＤＶＰ）。ＮＤＤＶＰ与１０２２次于沉积速度（Ｖｄ）实测资料之间平均比值为１．０６±０．８２，表明ＮＤＤＶＰ与实测资料有好的一致性。用分别具有ＮＤＤＶＰ和原Ｖｄ型的高分进区域酸沉积模式（ＥＭ３）作实例预测，发现仅由Ｖｄ型的不同所引起的ＳＯ＝４中心浓度之间最大比值可达２．４，用ＮＤＤＶＰ预测的物质浓度和干沉积量比用原Ｖｄ型有明显的改善。

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 velocity Vd 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 SO=4 can reach 2. 4 only due to different Vd pattern. 3-D distributinns of spotes concentrations and dry deposition are forecasted by NDDVP better than by the old Vd Pattern.