基于遥感反演的喀斯特地区城市热岛效应与叶面积指数相关性分析——以贵阳市为例

Correlation analysis of urban heat island and leaf area index in a typical Karst area based on remote sensing inversion——A case study of Guiyang city

探讨城市热岛效应与叶面积指数相关性,为缓解城市热岛效应提供科学依据。采用2002年Landsat TM、2013年Landsat OLI/TIRS数据,利用遥感反演技术,提取研究区地表温度和叶面积指数,分析两者在不同岩性条件下的相关性。研究表明:2013年相较2002年高温区、次高温区面积增长,中温区、次低温区、低温区面积下降。研究区地表温度与叶面积指数呈显著负相关,相关系数最高为0.718,最低为0.620。岩性对城市热岛效应与叶面积指数相关性无明显影响,城市热岛的分布规律及强度等级与叶面积指数在次低温区至高温区呈现负相关。叶面积指数变化对地表温度影响存在差异性,叶面积指数上升不会造成地表温度明显变化,叶面积指数下降将对地表温度造成较大影响。

We explore the relationship between the surface temperature and LAI to provide a seientif- temperature area in 2013 increased, the low temperature area was decline. There was a significant negative correlation between surface temperature and LAI. The highest correlation coefficient of LAI and the surface temperature was 0.718, and the lowest was 0. 620. Lithology has no effect on the correlation between the surface temperature and LAI, the distribution and intensity of Guiyang urban heat island and the average of LAI was nega and the high temperature area. LAI change has no obvious influence tire has on surface temperature, correlation between the sec limitation impact on surfac but LAI declines is likely ond low temperature e temperature, LAI to cause the surface perature rises.