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[B-1.9 A Study of Modeling of Local CO₂ Circulations]

[Contact Person]

Yasuo Sato
Head, First Research Laboratory
Meteorological Research Institute
Japan Meteorological Agency, Ministry of Transport
1-1 Nagamine, Tsukuba-city, Ibaraki 305, Japan
Tel:+81-298-53-8614 Fax:+81-298-55-7240
E-mail: ysato@mri-jma.go.jp

[Total Budget for FY1993-FY1995]

14,685,000 Yen(FY1995; 4,633,000 Yen)

[Abstract]

　A Biosphere-Atmosphere Interaction Model(BAIM) for use within physical climate models(two vegetation layers and three soil layers) was developed. In general, the fluxes simulated by the model agreed well with those observed. In particular, clear differences between the results using the parameters for C3 plants and those using the parameters for C4 plants appeared in the net carbon dioxide fluxes.
　CO₂ and H₂O fluxes were measured over an artificial grassland composed of 31 herbaceous species; eight among them belong to C4 plants of graminoid. Above-ground biomass was also measured. A multi-layer canopy model well simulated the observed daily and seasonal variations of CO₂ and H₂O fluxes over the grassland.

[Key Words]

Climate model, Biosphere model, CO₂ flux, C3 plants, C4 plants