大气中硫污染物的干沉降模式

Dry Deposition Model for Sulfur Pollutants.

建立了计算ＳＯ２和硫酸盐气溶胶干沉降速度的数值模式，模式中考虑了气象条件、下垫面特征等因素对不同污染物干沉降速度的影响．并利用该模式计算了典型下垫面上ＳＯ２和ＳＯ２－４的干沉降速度，其变化范围分别为０．２—１．０ｃｍ／ｓ和０．１—０．８ｃｍ／ｓ，与文献给出的结果对比表明，该模式用于计算硫污染物的干沉降速度是可行的。最后给出了包括我国大部分地区白天和夜晚的硫污染物干沉降速度的区域分布．

A dry deposition model for sulfur pollutants is developed,in which the effects of atmospheric conditions and surface types on the dry deposition velocity are considered.The dry deposition velocities of SO 2 and SO 2- 4 are calculated over several typical land categories.The dry deposition velocities of SO 2and SO 2- 4 vary from 0.2-1.0cm/s and 0.1-0.8cm/s respectively.This dry deposition model is one of the bases of the study of Sulfur Deposition Model .