抄録
Daily variations of sensible heat fluxes and vertical eddy diffusivities were obtained in summer and autumn in Tokyo. Observing sites were at 17m and 46m in hight above the surface in center of Tokyo and at 6m and 14m in hight above the surface in residential area. Vertical eddy diffusivities, Dz were measured with two different methods, which are the measurement with autocorrelation function and the measurement derived with relationship between heat flux and temperature difference between z1 and z2 in hight. The values of Dz at higher places and lower places are equal. Daily variations of Dz in urban area are 1.0〜2.0 (m^2/s) and in rural area are 0.1〜1.0 (m^2/s).
