NUMERICAL SIMULATION OF THE FORMATION MECHANISM OF THE ANTARCTIC OZONE HOLE

The global zonally averaged atmospheric chemistry model is developed in this paper.Theformation mechanism of the Antarctic ozone hole is numerically simulated using the model to checkthe viewpoints on the formation mechanism.The results show that:(1)The Antarctic ozone hole is a special phenomenon resulting from the heterogeneousreactions on the surface of the polar stratospheric cloud particles,under the special conditions oftemperature and circulation in Antarctic spring.The heterogeneous reactions reduce the NO_2concentration,resulting in the decrease of ozone production rate.The ozone content decreaseswhen its production is less than its destruction.This is the direct cause for the formation of theAntarctic ozone hole.(2)The impact of the polar vortex on the transport of trace species is not the determinativefactor in the formation of the Antarctic ozone hole.but makes the intensity of the ozone holechanged.(3)The solar cycles have negligible influence on the intensity of the Antarctic ozone holethrough photochemical reactions.

NUMERICAL SIMULATION OF THE FORMATION MECHANISM OF THE ANTARCTIC OZONE HOLE

The global zonally averaged atmospheric chemistry model is developed in this paper.The formation mechanism of the Antarctic ozone hole is numerically simulated using the model to check the viewpoints on the formation mechanism.The results show that: (1)The Antarctic ozone hole is a special phenomenon resulting from the heterogeneous reactions on the surface of the polar stratospheric cloud particles,under the special conditions of temperature and circulation in Antarctic spring.The heterogeneous reactions reduce the NO_2 concentration,resulting in the decrease of ozone production rate.The ozone content decreases when its production is less than its destruction.This is the direct cause for the formation of the Antarctic ozone hole. (2)The impact of the polar vortex on the transport of trace species is not the determinative factor in the formation of the Antarctic ozone hole.but makes the intensity of the ozone hole changed. (3)The solar cycles have negligible influence on the intensity of the Antarctic ozone hole through photochemical reactions.