济南市城市热岛效应的时空分布特征

论文应用区域自动气象站2007～2008年逐时气温观测资料,分析了济南城市热岛的时空分布特征,结果表明,无论春、夏、秋、冬,济南的城市热岛在空间分布上均以泉城广场、市政府为中心呈环状放射发展。热岛强度以冬季最强,秋、春季次之,夏季最弱。对城市热岛进行小波分析发现,济南冬季和夏季城市热岛的主要振荡周期是以准24h为代表的日变化和准270h所代表的旬变化为主。夏季日变化不如冬季明显,夏季旬变化略强于冬季。济南城市热岛以日为周期呈规律性变化,城市热岛强度表现为夜间强,白天弱。

The Temporal and Spatial distributions of Urban Heat Island Effect in Jinan City

Based on the hourly temperature observed by automatic weather stations during 2007-2008, the temporal and spatial distribu- tions of urban heat island （UHI） in Jinan city were analyzed. The results showed that in four seasons ,the UHI intensity centered on the Spring square and city council and decreased around. The UHI intensity in winter was the strongest all the year round. Then, it was autumn and spring. The UHI intensity in summer was the weakest. The Morlet wavelet transform revealed that the UHI intensity had a temporal structure of diurnal （24h） and ten-day （270h） periods whether in summer or winter. The diurnal （Ten-day） periodic oscillation was weaker （stronger） in summer than winter. The UHI intensity was stronger in nighttime than daytime.