| 等间距法和均值标准差法界定城市热岛的对比研究 |
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| 引用本文： | 陈松林,王天星. 等间距法和均值标准差法界定城市热岛的对比研究[J]. 地球信息科学学报, 2009, 11(2) |
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| 作者姓名： | 陈松林 王天星 |
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| 作者单位： | 陈松林,CHEN Songlin(福建师范大学地理科学学院,福建省亚热带资源与环境重点实验室,福州,350007);王天星,WANG Tianxing(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,北京,100875) |
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| 摘 要： | 利用ASTER数据反演地表温度,采用等间距法和均值-标准差法,将研究区温度场分别划分为4级、5级、6级,并根据热岛区的界定进一步将4级、6级细分为4级(a)、4级(b)、6级(a)和6级(b).在此基础上,对两种方法从城市热岛数量结构差异、热岛空间分布及细节表达等方面进行了系统对比分析.结果表明:两种方法所界定热岛的面积百分比随着分级数不同均出现跳跃现象,趋势基本一致.但就热岛强度而言,均值-标准差法对分级数的敏感性较等间距法小,在热岛的空间分布和温度变异的细节表现力等方面,均值-标准差法也优于等间距分级法.因此,综合来看,均值-标准差法是城市热岛界定的较适合方法.均值-标准差法以地表温度相对于平均温度的变异程度为依据进行热场划分,在多时相城市热岛演变、对比等研究中,一定程度上可以避开时相的差异.
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| 关 键 词： | 城市热岛(UHI) 热岛界定 等间距法 均值-标准差法 |
Comparison Analyses of Equal Interval Method and Mean-standard Deviation Method Used to Delimitate Urban Heat Island |
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| CHEN Songlin,WANG Tianxing. Comparison Analyses of Equal Interval Method and Mean-standard Deviation Method Used to Delimitate Urban Heat Island[J]. Geo-information Science, 2009, 11(2) |
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| Authors: | CHEN Songlin WANG Tianxing |
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| Affiliation: | 1 College of Geographical Sciences;Fujian Normal University;Fujian key Laboratory of Subtropical Resources and Environment;Fuzhou 350007;China;2 School of Geography;Beijing Normal University;State Key Laboratory of Remote Sensing Science;Beijing 100875;China |
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| Abstract: | Fuzhou was chosen as our study area.Using Temperature/Emissivity separation algorithm,land surface temperatures(LST) were retrieved from ASTER(Advanced Spaceborne Thermal Emission and Reflectance Radiometer) data set which was collected on April 6th,2004.Two methods named equal interval method and mean-standard deviation method were employed to divide land surface temperatures into four,five and six classes respectively.Synchronously,the domain of urban heat island(UHI) was determined according to its diffe... |
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| Keywords: | urban heat island delimitation of UHI Equal Interval Method Mean-Standard Deviation Method |
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