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IV. Conclusion

In the present paper, we have reported and analysed a case study of horizontal transport cross the southern subtropical barrier. That tropical/mid-latitude mass exchange event has been detected through aerosol profiles obtained by LIDAR over Durban, South Africa, by the end of April 1999. Daily ECMWF analysis, high resolution PV advection model and water vapour Infrared satellite images agree and suggest that the observed aerosol loading event in the upper troposphere and lower stratosphere over Durban is a result of a latitudinal air mass exchange from tropics into extra-tropics.

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