Abstract:
Based on the NCEP/NCAR reanalyzed data of ozone mass mixing ratio and temperature data during 2005—2009 and ECMWF Geopotential Height in 2006,the influences of the cold wave activity on the tropospheric O3 over the Northern China have been studied in this paper.Firstly’ the results show that ,in upper troposphere,the high-concentration ozone air located in high latitude will be carried to the Northern China along the cold wave path;and in the middle-lower troposphere,the low-concentration ozone air will arrive to Northern China regions.Thus the cold wave activity will affect the ozone distribution of Northern China.Secondly,the cold wave can lead to ozone increase at 250hPa and decrease at 700hPa,and the influence time is 1—4d.Thirdly, with the differences of the seasons and intensity of the cold wave,the influences of the cold wave activity on the ozone distribution vary.