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| 城市热岛效应的卫星遥感分析 | |
| 引用本文： | 王桂玲,蒋维楣,魏鸣.城市热岛效应的卫星遥感分析[J].海洋通报(英文版),2008,10(2). |
| 作者姓名： | 王桂玲 蒋维楣 魏鸣 |
| 作者单位： | 1. 解放军理工大学气象学院,江苏,南京,211101 2. 南京大学大气科学系,江苏,南京,210093 3. 南京信息工程大学中美合作遥感中心,江苏,南京,210044 |
| 摘 要： | 利用MODIS资料研究了2004年4月南京城市热岛特征及其影响因子，结合地表覆盖类型分析了植被归一化指数（Normalized Difference Vegetation Index，NDVI）、地表温度（Ts）、地表反照率（α）的城乡差异及其相互关系，探讨了城市热岛（Urban Heat Island，UHI）效应形成的机制。结果表明：南京城区存在着明显的城市热岛效应；城市平均Ts比乡村高约10．83％；城市NDVI和α分别比乡村低约为62％和18.75％；NDVI与Ts呈负相关，相关系数为-0．73，而NDVI与α之间关系与波段有关；城乡植被覆盖差异是造成UHI的主要原因，其次是地表反照率，通过提高植被覆盖率和地表反照率可以减小城市热岛效应。 |
| 关 键 词： | 卫星遥感 MODIS 城市热岛 地表温度 植被归一化指数 地表反照率 |
An Assessment of Urban Heat Island Effect using Remote Sensing Data |
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| WANG Guiling,JIANG Weimei,WEI Ming.An Assessment of Urban Heat Island Effect using Remote Sensing Data[J].Marina Science Bulletin,2008,10(2). | |
| Authors: | WANG Guiling JIANG Weimei WEI Ming |
| Abstract: | Characteristics of urban heat island (UHI) effect and its cause are investigated by using MODIS data in April 2004.Surface parameters from the MODIS data have surface temperature (ts),albedo((),and normalized difference vegetation index (NDVI).Their heterogeneities over urban and rural area are analyzed based on land cover classification,and their relations are also presented in order to explain the UHI effect.The results show that there exists obvious the UHI effect.Ts over urban areas are by 10.83 % higher than those over rural area,and NDVI and ( over urban area are by 62 % and 18.75 % less than those over rural area,respectively.Surface temperature has significantly negative correlation with NDVI and their correlation coefficient is-0.73.Correlation between NDVI and albedo is determined by the spectrum of light.Difference in vegetation cover is the primary cause of the UHI effect. |
| Keywords: | MODIS remote sensing MODIS urban heat island surface temperature NDVI albedo |
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