昆明热岛效应对降雨量的影响分析

Analysis on the Influence of Urban Heat Island on Rainfall in Kunming City

城市热岛效应对建筑能耗、人居环境的影响日益突出,本文利用昆明气象站和呈贡气象站1998—2018年逐日降雨观测数据,分析了空气温度、热岛强度、城镇化率对昆明市近20年来降雨的影响。结果表明昆明市热岛范围有进一步扩张和连片发展的趋势,改变了昆明和呈贡之间热力环流的形式,降雨量呈现小幅下降的趋势,下降幅度约为82.38 mm/10年;2008—2018年间发生极端天气大暴雨概率比1998—2007年翻了1倍。本研究可为城市环境研究和城市气象灾害预警提供参考。

The influence of urban heat island effect on building energy comsuption and living environment has become increasingly prominent.In this paper,based on the daily rainfall observation data of Meteorological Station in Kunming and Chenggong from 1998 to 2018,the effects of air temperature,heat island intensity and urbanization rate on rainfall in Kunming in recent 20 years are analyzed.The research shows that the scope of heat island in Kunming will expand further and develop continuously,which can change the form of thermal circulation between Kunming and Chenggong,and cause a slight decline in rainfall that is about 82.38 mm/10 years;The probsbility of extreme weather and torrential rain from 2008 to 2018 is twice as much as that from 1998 to 2007.In conclusion,this paper can provide reference for urban environmental research and meteorological disaster early warning.