本文针对稳定和不稳定层结二种情况,求出了大气边界层中在输送、扩散和化学转换、衰减的共同作用下的次生污染物浓度分布的解析解,同时也完善了初生污染物的浓度分布公式。由于化学转换和衰减的作用,初生污染物随着下风距离而较快地减少,特别是在10公里以后的中距离上更加明显;相应地,一个较高的次生污染物浓度将稳定地维持在一个较长的下风距离上。

In this paper, for both the steady and the unsteady stratifications, a set of analytical solutions of secondary Pollutant is obtained under the joint effects of transport, diffusion and chemical conversion and decay in the atmospheric boundary layer.The concentration distribution of the primary pollutant is improved, too. As a result of chemical conversion and decay,the primary pollutant decreases with the downwind distance more rapidly,especially as the mesoscale distance further than 10 km.Appropriately,a higher concentration of the secondary pollutant is stably held for a longer downwind distance.