Abstract
Observations were carried out to investigate effects of greening on the climate of Tama New Town. It was found that greening areas have significantly reduced the intensity of urban heat island in the town. Effects of greening on the urban heat island intensity was strongest at noon and in the early afternoon with the air temperature inside the Tama New Town Central Park was more than 2°C lower than that at the surrounding commercial or parking areas. Soon after sunset, temperature of the vegetated surface in the park became lower than that of the air and the park became a cool island. At the same time, paved asphalt or concrete surface in the town remained hotter than the atmosphere even at night. The upward sensible heat flux from the ground surface to the atmosphere together with anthropogenic heat made the air temperature in the town higher than that in the park.A turbulent closure model had successfully simulated the heating and dynamical processes in the area. The simulation results revealed that evaporation from water and vegetated surface cooled down the surface in the park.
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