Studies on Transport of Acid Substance in China and East Asia. Part II: Spatial Distribution of Sulfur and its Seasonal Variation
关于我国和东亚酸性物质的输送研究II. 硫化物浓度空间分布特征及季节变化

The spatial distribution and seasonal variation are analyzed for sulfur oxidate and sulfate in East Asia and China with the 3-D Euler Model for sulfur transport. The content of sulfur in air and seasonal vertical profile of sulfur for four land types are also discussed in the paper. It shows that SO 2 concentration is very sensible to the distribution of emissions' intensity on lower layers. Its high value areas locate in Shandong Peninsula, parts of the eastern China and Sichuan basin. Some small high-value-areas live scattered around large cities such as Shanghai, Taian, Seoul and Tokyo. The concentration of SO 2 on surface is higher in winter more than in summer. The pattern of distributions are different between higher and lower layer, changing from southwest-northeast pattern to west-east. But sulfate distributes smoother and smaller with a few high-value centers, especially for summer. The content of sulfur in air is crammed into the middle and lower reaches of the Changjiang River with a long nose to the East China Sea. The vertical profile of sulfur among four land types shows the different contribution of transport for various seasons.