论城市热岛效应的地貌成因

ON GEOMORPHOLOGICAL CONTRIBUTION TO URBAN "HEAT ISL AND"

从能量平衡的角度,分析了城市地貌储热方式和城市地表反射率偏低、蒸发微弱的地貌原因,认为城市地貌物质组成的“双层结构”、城市垂直墙面以及由垂直墙面和街面组成的城市“峡谷”等城市人工地貌的形成是引起城市热岛效应的主要因素。

The urban landform effects in reflection, evapotranspiration and storage heat form are analysed in this paper in view of energy balance. According to detail field data, following results are demonstrated. 'Honeycomb' structure of urban anthropogenic landforms is a key influence factor of surface reflection; the 'double layer' structure consisting of surface anthropogenic material and subsurface natural substrate is the important storage heat structure of urban landform; urban vertical walls and urban 'canyon' composing of flanking walls, not only decrease level dismission, but also increase exchanging heat flux. Urban landform plays a important role in contributing to urban 'Heat Island'.