A Study of Using Look-up Table Method to Simulate Tropospheric Ozone and NOx Evolution and Their Distributions
应用查表法模拟区域对流层O3、Nox分布和演化的研究

Using STEM-II gas phase photochemistry model, the main physical/ chemical factors which influence the photochemical transformation of tropospheric O3 and NOx have been discussed. The results show that strength of solar radiation flux, temperature, the concentration of NOx and the concentration of initial O3 are important factors considering the features of photochemistry contamination in China. Then, the look-up tables of O3 and NOx are respectively constructed by calculating the rate of photochemical transformation of O3 and NOx in various conditions according to these factors. These tables are coupled with the dynamic frame of the STEM-II model to simulate the evolution and distribution of the tropospheric O3 and NOx over East Asia. The results by this method are in pretty good agreement with those directly by using the original STEM-II gas phase photochemistry model, and this model can highly save computation time and keep the basic features of strong non-linear processes in atmospheric chemical reactions.