【摘要】 以郑州市为例,基于多期Landsat遥感影像和夜间灯光数据分析了城市地表温度、不透水面、植被以及城市人口的时空变化特征,并从不透水面、植被和人口密度三个方面分析其对城市地表温度的影响.结果表明:郑州市明显存在地表温度中心城区高,郊区低的热岛效应,热岛斑块逐渐向东南部、西部和北部扩散且逐渐破碎化,热岛面积呈增长趋势;不透水面指数与地表温度呈显著的指数正相关关系,植被指数、人口密度与地表温度分别呈现出较显著的线性负相关和正相关关系.利用逐步回归的方法表明,不透水面是影响城市地表温度的主要原因,植被和人口密度也是影响城市地表温度的重要因素.更多还原

【Abstract】 Zhengzhou city was taken as an objective to analyze the temporal and spatial characteristics of the land surface temperature,impervious surface,vegetation,and urban population based on multi-period Landsat remote sensing images and night-time lighting data in this study.The impact on the land surface temperature was analyzed from impervious surface,vegetation,and population density.The results showed that there was an apparent heat island effect that the surface temperature was high in the center of downtown and low in suburbs in Zhengzhou city.The patches of heat island gradually spread to the southeastern,western and northern regions and gradually crumbled finally.Moreover,the area of heat island showed an increasing trend.The correlation analysis indicated that the surface temperature was correlated exponentially and positively with the impervious surface but linearly and negatively with the vegetation significantly.The analysis also demonstrated that there was a significant positive linear correlation between density of population and land surface temperature.Furthermore,the stepwise regression analysis showed that the impervious surface was the main factor affecting the urban heat island effect,meanwhile,vegetation and population density were also important factors for the formation of urban heat island effect.更多还原