城市热岛研究进展

URBAN HEAT ISLAND: PROGRESS OF THE FIELD

概述了城市热岛研究方法的进展.地面观测方法的资料易于获取,积累时间长,但空间代表性不足;遥感监测方法具有实时直观,覆盖范围广的优点,但城市地表的异常复杂及地表城市热岛与大气热岛的本质差异,使其进展缓慢;边界层数值模式模拟是最具物理意义的方法,但模型本身和城市边界层的特殊复杂以及验证的困难均影响了它的精度及广泛应用.因此,必须在充分了解3种方法的研究进展基础上,相互结合,取长补短,才能进一步推进城市热岛的研究.

In this paper,three methods often used in urban heat island research are reviewed.Ground measurement data can be easily obtained and accumulated,but its spatial representative is poor.Remote sensing investigation is in real-time,straightforward and can cover large areas,but extremely complex urban surface and essential difference of urban heat island and surface heat island makes the field difficult and evolving very slowly.Boundary-layer numerical model has the most physical significance,but the model itself and urban boundary-layer is complex,while model validation is a problem too,which restricts its wide-spread use.The progress of our research on urban heat island requires incorporating these methods based on sufficient comprehension of their merits and disadvantages.