摘要
热岛效应是主导城市环境的要素之一,城市热岛效应研究对城市公共健康,空气质量等影响人居环境的诸多方面都具有重要意义。郑州市作为正处于快速城市化进程中的中等城市,有其广泛的代表性。本文采用ETM数据反演出郑州市地表温度,地表温度的空间分布表明热岛效应的存在,通过采样分析发现主城区温度比郊区温度高10.1℃,表明热岛效应比较明显。为了定量化的衡量城市热岛与地表覆盖的关系,本文还研究了地表温度和NDVI、地表温度和NDBI之间的相关关系,研究表明地表温度和NDVI具有较强的负相关关系,其负相关系数为0.606,与NDBI具有较强的正相关关系,其负相关系数达0.813 5。
Heat island effect is the dominant element of the urban environment,the study of heat island is of great significance to many aspects impacting the living environment.As the medium-sized city being in the fast urbanized advancement,Zhengzhou is representative.The land surface temperature of Zhengzhou was retrieved from ETM data in this paper,the spatial distribution of the temperature indicated the presence of heat island.Through the sampling analysis,the land surface temperature of urban areas is 10.1 higher than the temperature of suburban areas,which indicated the heat island effect is quite obvious.The relations between the land surface temperature and NDVI was studied in this article,the study shown that the surface temperature and NDVI have the strong inverse correlation relation,its coefficient is 0.606.The relation between land surface temperature and NDBI has also been studied,the result shown that the land surface temperature and NDBI have strong correlational relation,its coefficient is 0.8135.
出处
《测绘与空间地理信息》
2010年第6期85-88,共4页
Geomatics & Spatial Information Technology
