珠江三角洲土地覆盖变化对地表温度的影响
收稿日期: 2005-03-22
修回日期: 2005-06-15
网络出版日期: 2005-09-25
基金资助
河南省高等学校创新人才培养对象基金项目;广州大学引进人才科研启动基金项目
Influence of Land Cover Change on Land Surface Temperature in Zhujiang Delta
Received date: 2005-03-22
Revised date: 2005-06-15
Online published: 2005-09-25
Supported by
Henan Innovation Talents Fund for University; Guangzhou University Scientific Research Fund for Person with Ability Indraught
由于经济的快速增长,1978年以来的25年中,珠江三角洲地区的土地覆盖变化,特别是城市扩展速度非常之快。通过把遥感和地理信息系统相结合,研究了土地覆盖变化及城市增长状况,并且评估了城市增长对地表温度的影响。利用陆地卫星多时段数据监测了土地利用和土地覆盖变化;通过陆地卫星热红外单波段反演了地表温度,研究了土地覆盖变化特别是城市增长对地表温度的影响。结果发现,珠江三角洲地区土地覆盖变化明显,城市增长显著且不平衡。城市的发展使城市化地区的地表温度提高了8.9K。研究表明,遥感和地理信息系统的结合,在监测和分析土地覆盖变化,特别是城市增长状况以及评估城市化对地表温度的影响方面,是十分有效的。
关键词： 土地覆盖变化; 地表温度; 珠江三角洲; 陆地卫星TM/ETM
钱乐祥, 丁圣彦 . 珠江三角洲土地覆盖变化对地表温度的影响[J]. 地理学报, 2005 , 60(5) : 761 -770 . DOI: 10.11821/xb200505007
The Zhujiang Delta has experienced a rapid land cover change, especially urban expansion over the past 25 years due to accelerated economic growth. This paper reports an investigation into the application of the integration of remote sensing and geographic information systems (GIS) for detecting land cover change and urban growth, and assessing their impact on land surface temperature in the region. Remote sensing techniques were used to carry out land use/cover change detection by using multitemporal Landsat TM/ETM data, and retrieve out the land surface temperature by using single Landsat TM/ETM 6 thermal infrared data. The integration of remote sensing and GIS was further applied to examine the impact of land cover change and urban growth on land surface temperatures. The results revealed a notable and uneven urban growth in the study area. This urban development has raised land surface radiant temperature by 8.9K in the urbanized area. The integration of remote sensing and GIS was found to be effective in monitoring and analyzing urban growth patterns, and in evaluating urbanization impact on land surface temperature.
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