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.
Highlights
Since scientists discovered the ozone hole in Antarctica [1], and the ozone depletion phenomenon in winter in the Arctic [2], the phenomenon of low ozone values has been found over the “ThirdPole” of the world over the Tibetan Plateau
Using a box model of the heterogeneous chemical reactions of stratospheric ozone, this paper simulates the variation in ozone concentration with time at the altitude of 18 km between the Tibetan
From May to August, with the increase in aerosol area index, is the increase in ozone brought about by the low temperature in summer offset, but the ozone curve over the Tibetan Plateau is lower than that over the same latitude region as a whole, which is much lower in summer
Summary
Since scientists discovered the ozone hole in Antarctica [1], and the ozone depletion phenomenon in winter in the Arctic [2], the phenomenon of low ozone values has been found over the “Third. The main idea is that the dynamic transport process plays the most important role in the formation of the ozone valley; the chemical process can not be ignored. ATAL undergoes obvious seasonal changes: it is high in summer and autumn and low in winter and spring, and the peak value is mainly in July and August after all the volcanic ash effects are eliminated. The heterogeneous chemical reactions on aerosols may influence the formation of the summer ozone valley over the Tibetan Plateau, but the influence ratio has not been quantitatively evaluated. In this paper, we use the established box model of the heterogeneous chemical reactions of ozone in the lower stratosphere and satellite observation data to conduct a preliminary study on the above issues
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