DEVELOPMENT OF STUDY ON OZONE VARIATION AND ITS CLIMATIC EFFECT

In this paper,the developments of study on characteristics and mechanism of ozone variation and its climate effect are reviewed.The amount of tropospheric O 3(in North Hemisphere)is increasing,that of stratospheric O 3 is decreasing and the total ozone amount also is decreasing which show the trend of global ozone variation.The main reason is that the O 3 precusors,such as NOx,NMHC,CO,CH 4,are increasing due to human activities and the species(NOx,H 2O,N 2O,CFCs)which can destroy stratospheric O 3 are increasing.The enhancement of tropospheric O 3 will warm the ground surface and the lower atmosphere and the depletion of stratospheric O 3 may warm or cool the ground surface and lower atmosphere.It is a very effective way to use the global or regional climate model coupled with a atmospheric chemistry model for study on ozone variation and its climate effect.