广州市不同绿地冬季温湿度差异性研究

Heterogeneity of Air Temperature and Humidity under Different Green Spaces in Winter,Guangzhou

热岛效应是城市化进程中不可忽视的一个环境问题,而城市绿地能够有效地缓解此效应。文章研究了绿化天桥、屋顶、住宅小区、道路、森林、公园等6种绿地类型的温湿度特征,分析了6种绿地类型对城市微气候的影响。分析表明,绿化天桥和屋顶的温度显著高于绿化小区、道路、森林和公园,而相对湿度则显著低于其他绿化类型的;森林的温度显著低于其他绿化类型的,森林的相对湿度则显著高于其他绿化类型的。除公园外,其他绿地类型的全日温差都较小。

Urban heat islands are caused by urbanization, but urban green belts can offset or even reverse the heat island effect by transpiring water and shading surfaces. Air temperature and relative humidity measurements of 21 sites were observed in winter, including overbridges, rooftops, residential areas, roads, forests and parks. The results showed that, the air temperature values of overbridges and rooftops green belts were significant higher than other belts, and the air relative humidity values of the former were significant lower than other belts. Meanwhile, the air temperature values of forests were significant higher than other green belts, and the relative humidity values of forests were significant lower than other green belts. Except parks, the range in air temperature of other green belts during day and night was small.