- 12/03-06/04 : Post Doc, Max Planck Institute for Nuclear Physics, Atmospheric Physics Group, Heidelberg, Germany
- 08/04-12/04 : Visiting Scientist at the Dalhousie University, Dept. Physics & Atm. Science, Halifax, Canada
- 01/05-05/05 : Visiting Scientist at at the Max Planck Institute for Meteorology, Aerosol, Chemistry & Climate Group, Hamburg, Germany
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