都市キャノピーにおける温位・CO_2・H_2Oの鉛直分布と拡散係数(乱流熱物質拡散・伝達(2),一般講演)

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  • Vertical Profile and Turbulent Diffusivity of Air Temperature, CO_2, H_2O Within and Above a Suburban Canopy

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This paper shows the seasonality of vertical profile of air temperature, CO_2, and H_2O within and above a suburban canopy and the turbulent diffusivity of the scalars. The results were derived from field measurements of the vertical profiles and fluxes, which were conducted in a residential area (the mean height of canopy is 7.3m) of Tokyo, Japan. The normalized turbulent diffusivity of air temperature and CO_2 depended on height and atmospheric stability, which is similar to that for vegetated canopies. In contrast, turbulent diffusivity of H_2O was relatively smaller than that of heat and CO_2. H_2O is not efficiently transferred probably because the source of H_2O is localized at the lowest level of urban canopy.

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