2003 Volume 68 Issue 572 Pages 1-7
In this research, the outdoor thermal environment around residential buildings with and without greens were measured in winter and summer, and the following results were obtained. 1) In summer and winter, outdoor air temperature is 1.5K lower in the green space than in the no green space. 2) In summer, ground surface temperature is 8.3K lower in the green space than in the no green space. 3) In summer, moisture ratio is 1.1g/kg' lower in the green space than in the no green space. The results show that greens are effective to moderate air temperature, ground surface temperature and humidity. Heat mitigation effect of trees extends to out of tree shade. According to this measurement, the optimal green plantation is about 4.5m in height and 4m away from the building.
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