摘要
An updated version of the Regional Acid Deposition Model(RADM)driven by meteorological fields derived from Chinese Regional Climate Model(CRegCM)is used to simulate seasonal variation of tropospheric ozone over the eastern China.The results show that: (1)Peak O_3 concentration moves from south China to north China responding to the changing of solar perpendicular incidence point from south to north.When solar perpendicular incidence point moves from north to south,so does the peak O_3 concentration. (2)In the eastern China.the highest O_3 month-average concentration appears in July.the lowest in January and the medium in April and October.The pattern mainly depends on the solar radiation,the concentration of O_3 precursors NO_x and NMHC and the ratio of NMHC/NO_x. (3)Daily variations of O_3 over the eastern China are clear.Namely,O_3 concentrations rise with the sun rising and the maximums appear at noon.then O_3 concentrations decrease.The highest daily variation range of O_3 appears in summer(40×10^(-9) in volume fraction)and the lowest in winter(20× 10^(-9) in volume fraction). (4)Daily variations of O_3 over the western China are not clear.The daily variation range of O_3 is less than 10×10^(-9) in volume fraction.
An updated version of the Regional Acid Deposition Model(RADM)driven by meteorological fields derived from Chinese Regional Climate Model(CRegCM)is used to simulate seasonal variation of tropospheric ozone over the eastern China.The results show that: (1)Peak O_3 concentration moves from south China to north China responding to the changing of solar perpendicular incidence point from south to north.When solar perpendicular incidence point moves from north to south,so does the peak O_3 concentration. (2)In the eastern China.the highest O_3 month-average concentration appears in July.the lowest in January and the medium in April and October.The pattern mainly depends on the solar radiation,the concentration of O_3 precursors NO_x and NMHC and the ratio of NMHC/NO_x. (3)Daily variations of O_3 over the eastern China are clear.Namely,O_3 concentrations rise with the sun rising and the maximums appear at noon.then O_3 concentrations decrease.The highest daily variation range of O_3 appears in summer(40×10^(-9) in volume fraction)and the lowest in winter(20× 10^(-9) in volume fraction). (4)Daily variations of O_3 over the western China are not clear.The daily variation range of O_3 is less than 10×10^(-9) in volume fraction.
