Long-term Response Of Total Ozone To Solar Activity And Its Impact On Tropical Tropopause Height Over The Tibetan Plateau

In terms of Interim reanalysis (ERA-interim) monthly data by the European Centre for Medium-Range Weather Forecasts (ECMWF) for the period 1979-2015(37-yr) and the combine of Total Ozone Mapping Spectrometer (TOMS) and Solar Backscatter Ultra-Violet radiometer (SBUV) from National Aeronautics and Space Administration (NASA) for the period 1979-2008 (30-yr), the 8-12-year evolution features of total ozone over the Tibetan Plateau and its depletion relative to the other regions on the same latitude of the plateau are analysed. Based on these, the impacts of the most recent solar flux on total ozone depletion are discussed, the daily data for 10.7 cm solar radio flux is taken from the official website of the US National Oceanic and Atmospheric Administration (NOAA) National Geophysical Data Center (NGDC), for the above-mentioned period. What's more, through analysing the effect of total ozone on temperature in the lower stratosphere and middle-upper troposphere, focal point for the relationship between total ozone and the tropical tropopause height over the Tibetan Plateau through quantitative analysis. The primary results are shown as follows:? As for the Plateau ozone, data by the ERA-interim is consistent with the combine of TOMS and SBUV during the period of 1979-2008, with differences usually less than 5%.? The Plateau ozone reduced with lesser extent in various seasons during the past 37 years (1979-2015), as compared to the period of 1979-2008, namely, the downward trend has slowed in recent years.The Plateau ozone has trended down over the past 37 years, more prominent in spring, that is, the downtrend over the plateau is more obvious than those over the non-plateau.? The Plateau ozone and its depletion exist an obvious 8?12-year oscillation cycle in each season. After dispelling the error caused by high-frequency signal, the Plateau ozone with the high or low index is corresponding to the solar radio flux with each ridge and valley, but the ozone depletion behind the solar radio flux. Compared to the plain on the same latitude, the Plateau has more intense response to solar activity.?Reduced ozone cooling the stratosphere while warming the troposphere.There is a better correlation between total ozone and the temperature over the Tibetan Plateau than that of at similar latitudes elsewhere, especially in spring.?The Plateau ozone reduction will be accompanied by rising tropical tropopause height. It is apparent that there exists a wide range of values between 6.7 to 9.9 meters per DU. The Plateau ozone contribute to the trend of tropical tropopause height during the period of 1979-2015, between 5.1% to 31.5%respectively.