J4 ›› 2008, Vol. 26 ›› Issue (1): 23-27.

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Character istics of Hea t Island in Nan jing and Rela tion sh ip
Between Hea t Island and Land Use / cover

PE IHuan1 , FANG Shifeng2   

  1. 1. International Institute for Earth System Science, N anjing University, N anjing 210093 , China;2. College of Resources and Environm ent Science, X injiang University, U rum qi 830054, China
  • Received:2007-11-02 Revised:2007-12-15 Online:2008-03-31 Published:2008-03-31

南京市夏季热岛特征及其与土地利用覆盖关系研究

裴 欢1 ,房世峰2   

  1. 1.南京大学国际地球系统科学研究所,江苏 南京 210093; 2. 新疆大学资源与环境科学学院,新疆 乌鲁木齐 830054
  • 作者简介:裴欢(1982 - ) ,女,博士研究生,主要从事遥感及地理信息系统应用研究. E - mail: 1982197950@163. com
  • 基金资助:

    国家重点基础研究发展规划(973)项目(2001CB309404)资助

Abstract:

Landsat TM thermal infrared band data ofNanjing city in July was used in this study and according to single - window algo2 rithm, the land surface temperature of Nanjing city was obtained. Then the urban heat island characteristic of Nanjing city was dis2cussed and the reason of itwas analyzed. Through the combination of the remote sensing and geography information system techniques,the land use /cover types ofNanjingwere abstracted. Then the thermal radiation character of different land use /coverwas analyzed andthe relationship between land surface temperature and land use / cover types, especially p lant coverwas quantificationally analyzed. Theresults showed that there were three urban heat island centers in summer of Nanjing, and the land surface temperature in city p roper was higher than that in suburban district. Through comparison, the average land surface temperature in city p roperwas 3. 5 ℃ and 5.7 ℃ higher than that in the edge of city and suburban district. Urban heat island effectwas very distinct. The land surface temperature of different land cover types had great discrepancies, which were urban built land, farm land, grass land, forest land and water from high to low in order. The land surface temperature can reach 14 ℃ between urban built land and water. There was evident negative re2
lationship between land surface temperature and vegetation cover rate, the lower land cover rate was the main reason to urban heat is2 land.

Key words: land use / cover, land surface temperature, Landsat TM, single - window algorithm

摘要:

利用南京市7月的Landsat TM热红外波段数据,根据单窗算法反演得到南京市地表温度,讨论了南京市热岛特征,并分析了产生这种现象的原因。通过遥感和地理信息系统相结合,运用Land2sat TM数据,提取出南京市下垫面类型,分析了不同地表覆盖类型的热辐射特征并定量地分析了土地利用及植被对地表温度的影响。结果显示,南京市夏季主要存在3个热岛中心,分别是建成区、大厂区和八卦洲。南京城区地表温度明显比郊区地表温度高,通过地表温度对比分析发现,城区平均地表温度比城市边缘和远郊区地表温度分别高出3. 5 ℃和5. 7 ℃,城市热岛效应明显。不同地表覆盖类型的地表温度也有显著差异,从高到低依次为:城镇建设用地、耕地、草地、林地、水体。城镇建设用地与水体的表面温度最大相差14 ℃。城市地表温度与植被覆盖度具有明显的负相关关系,城市地表植
被覆盖度低是城市热岛出现的主要原因,今后应当更加注重城市绿地建设,提高植被覆盖率。

关键词: 土地利用/覆被, 地表温度反演, Landsat TM, 单窗算法

CLC Number: