植被覆盖度与城区地表热量的动态变化分析

DYNAMIC CHANGES ANALYSIS BASED ON VEGETATION COVERAGE CHANGES AND SURFACE HEAT DISTRIBUTION

近几年随着城市化进程的不断加快,城市周边环境发生了巨大的变化,其中最为突出的热点表现在城市气候状况的逐年变化,针对气候变化国内、外气候学家做出了众多研究成果。这里研究的重点在利用遥感技术对客观数据大面积、高时效、全面真实地分析处理的基础上,来动态地研究城市植被覆盖度变化与城区地表热量分布的关系,通过对1992年、2006年的Landsat 5TM遥感数据的分析,估算植被的覆盖度并对城区地表温度进行反演,从而客观得出植被覆盖度与城区地表热量分布图,揭示出植被覆盖度与城市地表热量分布之间的相互关系。研究结果表明,城市植被覆盖度与城市地表热量分布之间呈现出明显的负相关性,具体表现为植被覆盖度越低的地区,城市热量值比植被覆盖度越高的地区城市热量值高。

With the economic developing and city continuing to expand the scale of urban,peri-urban environment has undergone tremendous changes.One of the most outstanding performance was performance in climatic conditions from year to year changes in the city.For climate change,climate scientists have made numerous domestic and international research,this study focused on the remote sensing technology analysis the date by a way of a large area,efficiency and comprehensive analysis is using to analysis the relationship between vegetation coverage changes and Surface heat distribution.We use the TM remote sensing data of 1992 and 2006 to calculated the vegetation coverage and Surface heat distribution to reveal the relationship between vegetation coverage changes and Surface heat distribution.The results indicate that the vegetation coverage changes and Surface heat distribution show a significant negative correlation.