Experimental study of turbulence and vertical temperature profile in the urban boundary layer
by Hitoshi Kono; Satsuki Watanabe; Yoshinori Iwai; Yoshiki Ito; Tomokazu Aoki; Dai Tamura; Takashi Adachi
International Journal of Environment and Pollution (IJEP), Vol. 47, No. 1/2/3/4, 2011

Abstract: We observed the turbulence and vertical profile of temperature in and above the roughness sublayer (RS) using a tower, a tethered balloon and a Doppler sodar in Himeji City. A 3-D ultrasonic anemometer-thermometer was sited at a height of 54 m on the tower. The present results showed that in the RS, the ratio of friction velocity to wind speed, u* /u, observed under unstable conditions of −4.2 < z′/L < −0.5 were close to those under neutral conditions, where z′ = z − d; the displacement height of d = 2 m; L is the Monin-Obkhov stability length. In addition, σw/u* were lower than the universal function presented by Panofsky et al. (1977). The cross correlation coefficients for u′w′ and T′w′ under neutral and unstable conditions were also studied.

Online publication date: Thu, 30-Apr-2015

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