南京市不同地点冬季热岛效应比较研究

A comparison of heat island effects at different urban lands in winter in Nanjing city

对南京市4个地点的小气候进行观测发现,冬天位于城区的悬铃木行道树下和位于城郊的马褂木林内的太阳辐射强度明显小于篮球场和草坪地;地面辐射强度和地表温度呈篮球场>草坪>悬铃木行道树下>马褂木林内;篮球场、草坪、行道树下和马褂木林内的全天24 h平均气温分别是6.2,6.2,6.5,6.0℃,表明4种类型城市用地之间的小气候存在差异,其中城区气温较高,具有一定的温室效应。

Four types of urban lands in Nanjing including urban forest, street trees, lawn and basketball court were selected to measure the mieroelimate in the winter. The results showed that the solar radiation intensity was lower under the street trees of platanus and the urban forest of liriodendron than that at the basketball court and the lawn. The ground radiation intensity and the land surface temperature were in the order of basketball court 〉 lawn 〉 street trees 〉 urban forest. The mean air temperature in twenty four hours at the basketball court, lawn, street trees and urban forest were 6. 2, 6. 2, 6. 5, 6. 0℃ , respectively. It was found that the mieroclimate was different between four types of urban land.