DEVELOPMENT OF THE 2-D COUPLED STRATOSPHERIC-TROPOSPHERIC DYNAMICAL-RADIATIVE-CHEMICAL MODEL-PART Ⅲ:BUDGET OF TROPOSPHERIC OZONE^*

On the basis of original 2-D coupled model,36 species and 83 reactions about NMHCs are added.By using this model,the budgets of ozone,carbon monoxide and methane in the troposphere are analyzed.The results show that the amount of ozone transported from the stratosphere to the troposphere is about 1340 Tg/a,its producing rate in troposphere is about 1190 Tg/a and the amount of ozone cleared by the dry deposition in troposphere is 1700Tg/a.In troposphere,the ozone is mainly produced at lower level in middle latitudes of the Northern Hemisphere and at upper levels in tropics.