MULTIPOINT MEASUREMENT ON THE TURBULENT CHARACTERISTICS WITHIN URBAN-LIKE CANOPY USING NUMEROUS FINE WIRE

The authors performed a field measurement on the turbulent characteristics of an urban canopy layer over a square array of concrete cubes using numerous fine thermocouples and nine ultrasonic anemometers. Measured data using both thermocouples and anemometers is recorded simultaneously with a frequency of 10 Hz. The time and spatially fluctuations of air temperature based were discussed comparing the instantaneous velocity under the unstable condition. The result clearly showed that the passage of the microfront of temperature around the canopy, which are correlate the sweep and ejection motions measured above the canopy