| The distribution of Atmospheric ozone which is a greenhouse gas affects the atmospheric temperature directly. The topography of the Tibet Plateau has significant influence on the climate. TOMS and OMI total ozone data, SCIAMACHY ozone profile data, and NCEP-DOE Reanalysis 2 air temperature and surface temperature data are used in this paper. The study focuses on the climatic features and variation of ozone distribution and vertical density of ozone over the Tibetan Plateau (24.5°N～42.5°N,69°E～104°E). The relationships between total ozone and surface temperature, ozone profile and air temperature are investigated. The results obtained are as follows:In the first instance, southern Tibetan Plateau (28.5°N, 87°E) has a closed low total ozone area and its total ozone has a low value in this area. The contour lines of total ozone are parallel to contour lines of the higher latitudes. From 1979 to 2009 the total ozone trend decreases in value. Most evidently with a sharp decrease is from 1993 to 2004 particularly in January, February, December with reduction of 12DU, 27DU and 12DU respectively. In the period of 2005 to 2009, the decrease of total ozone moderates or even replenishes in winter.Secondly, wavelet analysis of TOMS ozone data from 1979 to 1993 illustrates that the total ozone circle in the Tibetan Plateau does not only change yearly but also changes are recorded with every twenty, twenty-nine, forty-eight, one hundred and eight months in a circle basis.Thirdly, spatial correlation analysis of OMI ozone data in 2007 depicts that the low ozone center moves towards the southeast of Tibet after it retained a minimum value.Moreover, analysis of SCIAMACHY ozone vertical density data shows that the ozone vertical densities clearly change at about 14 to 21 kilometers especially in the 18km which is the strongest change. In 2003-2008 ozone vertical density shows an increasing trend below 25km and the most significant increase is at 18 km. It also shows a trend of decrease in the middle stratosphere (25 to 40 km) and the most significant decrease is near 33 km. In the top of stratosphere (40 to 50 km) it again shows a trend of increase.In addition, analysis of NCEP-DOE reanalysis 2 surface temperature data in Tibet shows that the contour lines of surface temperature are very similar with the plateau contour lines, indicating a close relationship between them. In 1979-2009, the average surface temperature over the plateau increased by 0.79˙C. It depicts that the surface temperature has increased in northwest and southeast of the plateau and decreased in northeast and southwest of the plateau. The increase of surface temperature is however very clear in the northwest of the plateau.Analysis of NCEP-DOE reanalysis 2 air temperature data shows that air temperature has decreased in the lower stratosphere and upper troposphere (250hPa~10hPa) and increased in the middle and lower troposphere (1000hPa~250hPa).The first space vector of EOF analysis shows that the total ozone anomalies is evident in northwest of the Tibetan Plateau; surface temperature anomalies are evident in the southwest of the plateau; ozone vertical density anomalies are evident near 18 km and 32 km; air temperature anomalies are evident near 300hPa and 70hPa.Finally, the first mode of SVD analysis illustrates that there are significant relationships between total ozone field and surface temperature field in the Tibetan Plateau and the center of the high correlation area was at 33°N / 99°E. It further indicates that the surface temperature has been increased along with decreased total ozone. It also has a close relationship between air temperature field and ozone vertical density field. Changes of air temperature in the 250~200hPa (11~13 km)/100~30hPa (18~25 km) and ozone vertical density in the 15~23 km /31~36 km has a very close relationship, and air temperature would increased (decreased) with increased (decreased) of ozone vertical density .The two factors are positively related fields.
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