福建省福州城市热岛效应与气象条件的关系研究

利用福州市2008年1~7月的气象资料分析了城市热岛变化特征以及降水量、风速和天气形势对热岛强度的影响。结果表明:1、2月份白天福州的城市热岛较强,3~7月份夜间的城市热岛强;有无降水的情况下福州的城市热岛都会存在,但降水对热岛有明显的负作用;风速在1 m/s左右时热岛强度最大,随着风速的加大,热岛开始减弱,风速一旦超过7 m/s热岛很难再维持;反气旋控制下福州的热岛强度强。

Study on the Relationship between Meteorological Condition and Urban Heat Island Effect in Fuzhou

Based on the meteorological data from January to July of 2008 of Fuzhou City of Fujian Province,the features of urban heat island effect(UHI) and the effect of precipitation wind velocity and synoptic situation on UHI was analyzed.The results showed that the UHI in daytime was stronger than in nighttime in January and February,and that was weaker than in daytime from March to July.The UHI existed both in sunny and rainy days,but the negative impacts of precipitation on UHI intensity was evident.The UHI was the strongest when wind velocity was about 1 m/s.The UHI intensity became to weaken as wind velocity increasing,and the UHI disappeared when wind velocity was above 7 m/s.The UHI was stronger when Fuzhou City was dominated by anticyclone than cyclone.