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KMID : 1024519940030010017
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Journal of the Environmental Sciences
1994 Volume.3 No. 1 p.17 ~ p.29
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Numerical modeling of Atmosphere - Surface interaction considering Vegetation Canopy
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Lee Hwa-Woon
Lee Soon-Hwan
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Abstract
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An one dimensional atmosphere-vegetation interaction model is developed to discuss of the effect of vegetation on heat flux in mesoscale planetary boundary layer. The canopy model was a coupled system of three balance equations of energy, moisture at ground surface and energy state of canopy with three independent variables of (foliage temperature), (ground temperature) and (ground specific humidity). The model was verified by comparative study with OSUID(Oregon State University One Dimensional Model) proved in HYPEX-MOBHLY experiment. As the result, both vegetation and soil characteristics can be emphasized as an important factor iii the analysis of heat flux in the boundary layer. From the numerical experiments, following heat flux characteristics are clearly founded simulation. The larger shielding factor(vegetation) increase of while decrease . because vegetation cut solar radiation to ground. Vegetation, the increase of roughness and resistance, increase of sensible heat flux in foliage while decrease the latent heat flux in the foliage. Key Word : numerical simulation, vegetation, canopy model, planetary boundary layer
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KEYWORD
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numerical simulation, vegetation, canopy model, planetary boundary layer
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