江西省严重酸雨地带形成的影响因素

On the influent factors for the formation of severe acid rain band in Jiangxi Province

采用数字模拟技术,绘制了江西省降雨pH值曲面投影图及其等值线图,发现江西省在南昌(鹰潭(临川(吉安(赣州一线形成南北方向的“r”字形的严重酸雨带,并指出这条严重酸雨带的走向与信风环流圈和副热带高压带纬向环流一致.提出了矿山废石堆的硫化矿物是造成严重酸雨的主要致酸物质来源,揭示了江西省降雨pH值随副热带高压脊季节性南北推移而变化的规律.

A numerical simulation technique is adopted to draw the surface projection map and its isograms of the pH values in the precipitation over Jiangxi Province.It is found that a severe acid-rain band is formed along the southern-north direction of Nanchang-Yingtan-Linchuan-Jian-Ganzhou in the Province,taking a shape of “r”. It is discussed and pointed out that this direction of the formed acidrain band coincides with the atmospheric trade wind circulation and the latitudinal circulation of the subtropical high-pressure band. It is proposed that the sulfide minerals in the wasted ore piles in the mines over the Province are the main sources of the major acidifying substances of sever acidrain. Furthermore, it reveals a regular pattern that the pH value of the precipitation over the Province is varying with the seasonal southern north movement of the subtropical high-pressure ridge.