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23,323,000 Yen (FY 1993 8,456,000 Yen)
A three dimensional global transport model was developed unsing semi-Lagrangian transport scheme and analyzed meteorological data. The model was equipped with non-local diffusion of planetary boundary layer and total mass fixer which adjust time change rate depending on the increase or decrease of total mass. The model has 2.5 degrees horizontal resolution, 15 vertical sigma levels and makes global distribution of the constituent for every 6 hours.
Inter-hemispheric exchange time w as about one year using ECMWF/TOGA advanced upper air data set of 1992 although vertical and horizontal diffusion associated with cumulus convection were not incorporated.Interhemispheric gradient of CFC-11 was simulated as 15 pptv which is consistent with ALE/GAGE observations.
Troposphere, Chemical Transport, Semi-Lagrangian, GCM