Abstract
Microclimatic observations about the thermal environment of vertical green screen out of wall were performed in summer. The ultrasonic anemometer thermometers and very fine thermocouples (diameter: 0.025mm) were used to avoid the radiation effect on the measurement of air temperature. The leaves surface temperature was higher than surrounding air temperature during midday. In addition, air temperature in the vicinity of the leaf was also higher than the ambient air. Therefore, the evidence of evaporative cooling effect of the green screen on surrounding air could not be found.
