Study on the Sensitivity of Summer Ozone Density to the Enhanced Aerosol Loading over the Tibetan Plateau

Abstract

The existence of the Asian tropopause aerosol layer (ATAL) and the influence of the heterogeneous chemistry of aerosols on the summer ozone valley over the Tibetan Plateau have received continuous attention. In this paper, based on the established box model of the heterogeneous chemical reactions of stratospheric ozone and comparative simulation and sensitivity tests, the influence of heterogeneous chemical reactions of possible aerosols over the Tibetan Plateau on the ozone valley is analyzed and evaluated. The preliminary results show that from May to August, the change in the temperature and pressure field has little effect on the ozone valley, and the lower the temperature is, the higher the ozone concentration. The temperature itself has a negative correlation with ozone chemistry. The influence ratio of heterogeneous chemical reactions on the ozone valley from May to August is approximately 0.5–17%, and the maximum in June is approximately 5%. With the decrease in monsoon convection, the influence ratio of heterogeneous chemical reactions increases.