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1、第31卷第5期北京林业大学学报Vol.31,No.52009年9月JOURNALOFBEIJINGFORESTRYUNIVERSITYSep.,2009北京市植被绿度与城市热岛效应关系研究121武鹏飞王茂军张学霞(1北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室2首都师范大学资源环境与旅游学院)摘要:以北京市为研究区域,以LandsatTM影像为基础数据,定量反演亮度温度(Tb),提取归一化植被指数(NDVI),并利用RS和GIS技术在东北西南和西北东南方向构建多个特征剖面,探讨T
2、b与NDVI的关系在空间上的分布规律。结果表明:除了在西北东南方向的76、78、80、82km处剖面外,其他剖面上Tb和NDVI存在明显的负相关关系。剖面上Tb与NDVI相关性的显著程度呈现由中心剖面向边缘剖面递减的格局。剖面上Tb与NDVI相关性的显著程度受下垫面土地利用结构的复杂程度影响,土地利用结构越复杂,特征剖面上Tb与NDVI的相关性越显著。研究结果较好地揭示了植被与温度相关性的空间分布规律,可为北京市未来的城市、绿地等规划提供科学依据。关键词:归一化植被指数;亮度温度;城市热岛;特征剖面中图分类号:S73
3、11;S7572文献标志码:A文章编号:10001522(2009)05005407121WUPengfei;WANGMaojun;ZHANGXuexia.RelationshipbetweenvegetationgreennessandurbanheatislandeffectinBeijing.JournalofBeijingForestryUniversity(2009)31(5)5460[Ch,19ref.]1KeyLaboratoryofSoilandWaterConservatio
4、n&DesertificationCombatingofMinistryofEducation,SchoolofSoilandWaterConservation,BeijingForestryUniversity,100083,P.R.China;2InstituteofResourcesEnvironment&Tourism,CapitalNormalUniverstiy,Beijing,100037,P.R.China.Inthispaper,brightnesstemperature(Tb)andnormalizeddi
5、fferencevegetationindex(NDVI)werequantitativelyderivedfromLandsatTMimagesofBeijing.FeatureprofilesofTbandNDVIweredrawninthedirectionsofNESWandNWSEusingthetechnologiesofRSandGIS.LawsofspatialdistributionoftherelationshipbetweenTbandNDVIwerediscussed.Theresultsshowe
6、dthat:1)therewasasignificantnegativecorrelationbetweenTbandNDVIinbothdirectionsexcepttheprofilesof76,78,80and82kminthedirectionofNWSE.2)Thelessthedistancebetweentheotherprofilesandthecentralprofilewas,thestrongerthenegativecorrelationbetweenTbandNDVIwas.3)Therelati
7、onshipbetweenTbandNDVIwasaffectedbythecomplexityoflandusestructures.Themorecomplexthelandusestructurewas,thestrongertherelationshipbetweenTbandNDVIoffeatureprofilewas.Thispapereffectivelyrevealsthespatialcorrelationsbetweenvegetationandtemperature,andthuscanprovidec
8、ertainscientificsupportforBeijingsurbanandgreenlandplanninginthefuture.Keywordsnormalizeddifferencevegetationindex(NDVI);brightnesstempe