| 地表参数反演及城市热岛时空演变分析 |
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| 引用本文： | 王天星,陈松林,阎广建.地表参数反演及城市热岛时空演变分析[J].地理科学,2009(5). |
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| 作者姓名： | 王天星 陈松林 阎广建 |
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| 作者单位： | 北京师范大学地理学与遥感科学学院遥感科学国家重点实验室;福建师范大学地理科学学院; |
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| 基金项目： | 国家973项目(2007CB714402); 国家自然科学基金(40871164)项目; 福建省自然科学基金项目(2007J0345)资助 |
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| 摘 要： | 采用TES算法实现了ASTER地表温度的反演,在对发射率估算方法改进基础上,利用单窗算法反演1989年TM地表温度。结合C地形校正,利用线性光谱模型提取植被覆盖度与城市不透水面密度,利用反射率提取NDVI。从多方面对城市热岛时空演变进行综合研究,研究表明,与等间距法相比,均值-标准差法可以较合理地刻画地表热场的分布,一定程度上可以避开不同时相的差异。最后时空对比及空间统计学分析显示,1989~2004年间福州市城市热岛面积、热岛强度都有所增加,城市热岛总体趋势为西北-东南走向,并逐渐向北-南方向偏移,而且城市热岛重心向东南方向偏移。
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| 关 键 词： | ASTER TM 植被覆盖度 不透水面密度 地形校正 线性光谱模型 城市热岛 |
Estimation of Land Surface Parameters and Spatio-temporal Characteristics of Urban Heat Island |
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| WANG Tian-xing,CHEN Song-lin,YAN Guang-jian.Estimation of Land Surface Parameters and Spatio-temporal Characteristics of Urban Heat Island[J].Scientia Geographica Sinica,2009(5). |
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| Authors: | WANG Tian-xing CHEN Song-lin YAN Guang-jian |
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| Institution: | WANG Tian-xing1,CHEN Song-lin2,YAN Guang-jian1(1.School of Geography,Beijing Normal University,State Key Laboratory of Remote Sensing Science,Beijing 100875,2.College of Geographical Sciences,Fujian Normal University,Fuzhou,Fujian 350007) |
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| Abstract: | Fuzhou was chosen as the study site,land surface temperatures were estimated form both ASTER images acquired on April 6,2004 and Landsat TM image collected on June 15,1989.Then the linear spectral unmixing-LSU model was used to estimate the vegetation abundances and percent of impervious surface from ASTER images.Before employing the LSU,the water body within the study area was masked and the C-terrain correction was applied to the images.Subsequently the NDVI image was also calculated using reflectance dat... |
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| Keywords: | ASTER TM vegetation abundance percent of impervious area terrain correction linear spectral unmixing model urban heat island |
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