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[B-5.2 Modeling of Material Transport in the Troposphere]

[Contact Person]

Masayasu Hayashi
Head, Interspheric Environment Section
Environment Assessment Division
National Institute for Resources and Environment
16-3 Onogawa, Tsukuba, Ibaraki, 305 JAPAN
Phone +81-298-58-8380, Fax +81-298-58-8358
E-mail p1620@nire.go.jp

[Total Budget for FY1991-1993]

23,323,000 Yen (FY 1993 8,456,000 Yen)

[Abstract]

　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.

[Key Words]

Troposphere, Chemical Transport, Semi-Lagrangian, GCM