查表法在大气复合污染模拟中的应用研究

In this paper, look-up tables of main air pollutants were coupled in our self-developed regional air quality model RegSRRMS. With the aid of the model, tropospheric air quality over the typical city cluster in China were studied, and the capacity of look-up table method to predict air pollution complex episodes was evaluated. Firstly, based on the structure of WRF-CHEM, a new box model named WRFBOX that consists of new advanced gas phase chemical modules and aerosol modules was built. Secondly, the key physical and chemical factors that may affect tropospheric photochemistry and formation of aerosols were discussed based on WRFBOX. And then, by calculating the concentrations of pollutants with various combinations of these key factors, the look-up tables of ozone chemistry, formation of inorganic aerosols and formation of second organic aerosols were constructed. Finally, the look-up tables were applied in RegSRRMS to simulate the concentrations of trace gases and aerosols over Pearl River Delta Region and its surrounding areas during an episode of air pollution complex in Mar., 2000. The results showed that the used look-up table scheme could not only keep the basic features of atmospheric chemical reactions, but also significantly increase the computational efficiency by saving 35.8% operation time. In all, using look-up table scheme in regional air quality models can be propitious to the fast response of air pollution complex in city clusters.