复杂辐射场对城市微气候的影响
Impact of complex radiation field on urban microclimate
摘要：
太阳辐射是影响城市微气候的关键要素。为分析辐射场对微气候的影响机制，提出了城市复杂辐射场的概念并分析了其特性。采用模拟方法研究了下垫面、空间围合方式与城市辐射场的关系及辐射场对微气候的影响。研究发现：下垫面热物性参数对城市辐射场影响显著，建筑围合空间下垫面对辐射场的影响比开敞空间更显著；长波辐射发射率大的下垫面对微气候影响更显著；辐射场对气温的影响强于对相对湿度的影响。
Abstract：
Solar radiation is a key factor affecting the urban microclimate. In order to analyse the influence mechanism of radiation field on the microclimate, proposes the concept of urban complex radiation field and analyses its characteristics. Adopts the simulation method to study the relationship between the underlying surface, the enclosed space and the urban radiation field, and the influence of radiation field on the microclimate. The research finds that the thermal parameters of the underlying surface of enclosed spaces have a more significant impact on the urban radiation field than those of open spaces. The underlying surface with a large long-wave radiation emissivity has a more significant impact on the microclimate. The influence of radiation field on air temperature is stronger than the influence on relative humidity.
Keywords:complex radiation field, urban microclimate, enclosed space, reflected radiation, long-wave radiation