基于Landsat卫星数据的山东临沂市热岛效应研究

利用Landsat卫星数据分别反演了2005年和2014年临沂市的地表温度和不透水层指数，分析了城市化进程对临沂市热岛效应的影响。结果表明，2005年临沂市表现为中等强度的热岛效应，2014年表现为强热岛效应。利用地面站点资料统计分析来看，2005～2014年，临沂市热岛强度总体呈波动增加的趋势,冬季最强，春秋季次之，夏季较弱。分析城市化因子发现，城市经济、人口、用电消耗、城市房屋面积增量等多个因素对城市热岛强度变化的影响，其相关系数分别为0.86、0.82、0.67、0.81，其中房屋面积增量与热岛强度增强密切相关。从不透水层指数分布图的动态变化来看，也说明了城市化进程中城镇建筑和硬化的路面的增多导致了热岛强度的增强。

Study on heat island effect of Linyi City in Shandong province based on Landsat satellite

This paper used Landsat satellite data evaluated surface temperature and impervious layer index of the Linyi city in 2005 and 2014, analyzed the influence of urbanization on the heat island effect of the Linyi city. The results show that, it showed moderate heat island effect in 2005,and strong heat island effect in 2014.Combined with the data of ground stations, the change characteristics of city heat island intensity from the 2005 to 2014 years in Linyi, winter is the strongest, spring and autumn are medium, and summer is weak. The analysis of urbanization factors shows that, the correlation of urban economy, population, electricity consumption and urban housing area increment on urban heat island intensity is 0.86, 0.82, 0.67 and 0.81.The dynamic change of impervious layer index distribution map also shows that the increase of urban buildings and hardened pavement in the process of urbanization leads to the enhancement of heat island intensity. The increase of urban housing area is closely related to the enhancement of heat island strength.