小都市における市内外の拡散係数 : 都市における大気の拡散係数に関する測定(その1)

概要

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Daily variations of sensible heat fluxes and vertical eddy diffusivities were obtained in early summer in Utsunomiya, 100km north of Tokyo. Observing sites were at 15m and 25m in hight above the surface in urban area and at 13m and 25m in hight above the surface in residential area. Vertical eddy diffusivities, Dz were measured with two different methods, which are the measure- ment with autocorrelation function and the measurement derived with relationship between heat flux and temperature difference between zl and z2 in hight. The values of Dz at higher places and lower places in residential area are equal : yet the values of Dz in urban area are not equal due to the effects of surrounding environment. Daily variations of Dz in urban and rural area are 0.1-1.0 (m^2/s).
社団法人日本建築学会の論文
1997-11-30