Vertical Ozone Profile over Tibet Using Sage I and II Data

This paper discusses the vertical ozone distribution over Tibet using SAGE I and SAGE II data. The annual and seasonal vertical ozone profiles in 10.5-50.5 km a.s.l. over Tibet are analyzed to understand the vertical structure of low ozone value in this region, Regarding to the local ozone deficit, these profiles are compared with the vertical ozone distribution in the non-mountain areas at the same latitudes. The summer low ozone and the May maximum ozone deficit are detected from the SAGE data. The largest ozone deficit in May is found in 15.5-20.5 km a.s.l. centered at 16.5 km over this region. This ozone deficit can be related to the upward mass transfer described by poten-tial temperature variation over Tibet.