In order to fully understand the relationship between atmospheric ozone in the mid-high latitude over the Northern Hemisphere (NH) and the polar vortex intensity (PVI) in winter, according to the correlation method and E-P flux method, the relationship between them are analyzed (the four key regions included Arctic, East Asia, North America and Western Europe are taken as samples) and their influence mechanism have been studied based on ECMWF reanalysis data during January 1979 to December 2011. The results show as following. Firstly, there was a significant negative correlation between the total amount of ozone and PVI in the stratosphere of the Arctic in winter. Secondly, in the years whose average PVI values were bigger (smaller), the total amount of ozone in the polar and North America area decreased (increased) significantly. Thirdly, when PVI was weaker, the vortex-motion heat flux to the stratosphere was stronger, and there was an enhanced convergence of E-P flux divergence in the mid-high latitude, which resulted in residual circulation increasing and led to shifting high concentration ozone from the mid-low latitude areas to mid-high latitude areas, as a result, the ozone increased in high latitude areas. Finally, the vortex-motion heat flux in the stratosphere over the mid-high latitude areas had an increasing trend form 1979 to 2011, leading to the increase of temperature in the north pole, which resulted in the inhibition of heterogeneous reaction to increase the total amount of ozone in north pole region in the end.
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