Abstract
AbstractTropospheric column ozone data during 1979 to 1992 over the Tibetan Plateau and solar flux F10.7 index data at the same period, are used to study the relationship between tropospheric ozone variation and solar flux change. It is shown that there exists a solar cycle changing trend in the tropospheric ozone at this region. The estimated changes in tropospheric and stratospheric and column total ozone over a solar cycle are respectively 1.31, 4.97 and 6.628 Dobson units (DU), or 4.07%, 2.04% and 2.28% from solar minimum to solar maximum. This is quite different from that trend over tropical Pacific region discovered by Chandra et al 1999. In the tropic Pacific region, a negative changing trend was found. There are at least two aspects should be put into consideration in explaining the difference. One is the different components of NOX and water vapor in the background atmosphere over those two regions. The other is the frequent exchange and transmission of stratosphere‐troposphere atmospheric substances over the Tibetan plateau, which may result in some ozone sent to troposphere from stratosphere.
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