ENSO signal in total ozone over Tibet

Based on the analysis of satellite ozone observation and atmospheric circul ation data, this study discusses the ENSO signal in the inter-annual variat ion of Tibet total ozone, comparing with the tropics and non-mountain zone at the same latitudes of Tibet. It is shown that the Tibet ozone increases in El Nino events and decreases in La Nina events, with weakened amplitudes compared with the Southern Hemisphere. In addition this article discusses the mass transportation related to the ozone variations.