南京城市热岛效应研究

Study on Urban Heat Island Effect of Nanjing

利用4个气象站1961～2005年气温资料,对南京市的城市热岛效应进行了全面、细致的研究。结果表明:1)平均而言,南京市的热岛强度基本在0.5℃左右,热岛强度的高值体现在最低气温上,极端情况可能达到6℃左右;2)南京城市热岛效应具有明显的季节变化和日变化特征,夏半年要强于冬半年,夜间强于白天;3)随着城市规模的发展,南京市的城市热岛效应为增强趋势,用年平均气温计算获得的热岛强度增幅为0.109℃.(10a)-1。

Using air temperature data of four weather stations from 1961 to 2005, the urban heat island （UHI） effect of Nanjing was all-around investigated. The conclusion can be drawn as follows： The UHI intensity of Nanjing is about 0.5 ℃ generally, the high value of UHI intensity manifests in the lowest air temperature and its extreme may reach about 6 ℃. The UHI effect in Nanjing has obviously seasonal and daily change characteristics. UHI intensity of summer half year is higher than that of winter half year and that in nighttime is higher than in daytime. Along with the development of urban scale, the UHI intensity of Nanjing is increasing, and the rate is 0. 109 ℃·（10 a）^-1, which calculated by yearly averaged air temperature.