我国东部地区硫沉降模拟研究──模式应用

Sulfuric deposition modeling research in the east part of China──model application

利用作者研究的统计箱模式，模拟分析了１９９０年的硫沉降及其来源。结果表明，ＳＯ２浓度分布与排放源有着密切的关系，而ＳＯ２－４浓度分布受气象场的影响较明显；干沉降作用对大气中的ＳＯ２是一个重要的清除过程，ＳＯ２－４在大气中的清除主要通过湿沉降过程实现；硫沉降污染主要集中在华北大部，长江中下游的江浙地区、川贵部分地区和华中地区的武汉、长沙等地附近；直辖市的排硫大部分传输沉降到相邻的省份，其它省份的排硫一半左右沉降在本省，大约三分之一的排硫输送到相邻的省份。

Using the model discussed in the article I, sulfuric deposition in the east part of China for the year of 1990 was computed. The results indicated that the distribution of yearly averaged SO2 concentration has close relationship with the emission source, but the distribution of SO_2￣(-4) is significantly influeced by the meteorological field. Dry deposition and wet deposition are major removal factors for airborne SO2 and SO2-4 respectively. The areas where high sulfuric deposition happened are most parts of North China, lower reaches of Changjiang River, some parts of Sichuan and Guizhou provinces and the cities of Wuhan , Yichang and Changsha in Middle China.Most SO, emission of the three municipalities directly under central government deposit in adjacent provinces. About 50% SO2 emission of the modeled provinces deposites in themselves, with about one-third deposited in their adjacent provines.