我国对流层大气臭氧的数值模拟

本文建立了一个用于对流层大气臭氧模拟的三维欧拉模式,针对影响臭氧光化学转化的各种因素及我国城市光化学污染的特点,模式中简化了光化学项的计算。根据实际观测资料,提出了模拟云雾对臭氧影响的参数化方法,并确定了云雾作用系数,通过模式的数值模拟,得出了我国对流层大气臭氧,特别是近地面层大气臭氧的分布状况、我国城市光化学污染的分布特征以及它们的季节变化规律.

Numerical Simulation of Tropospheric Ozone over China

A three - dimensional Eulerian model for tropospheric ozone simulation was developed. Considered all factors that affect ozone photochemical transformation and characteristics of photochemical pollution in China, a coupling method of photochemical reactions in model was proposed to avoid the calculating complexity caused by chemical dynamic equations. According to ozone observation results, parameterization of influence of clouds on tropospheric ozone was studied and a cloud consuming rate of ozone is specified by numerical tests. Through numerical simulation the averaged distribution of tropospheric ozone (especially surface layer ozone) over China, its seasonal changes and some characteristics of distribution of Chinese urban photochemical pollution were studied.