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遥感技术与应用  2016, Vol. 31 Issue (4): 702-708    DOI: 10.11873/j.issn.1004-0323.2016.4.0702
模型与反演     
南京冬季典型植被光谱特征分析
马东辉,柯长青
(江苏省地理信息技术重点实验室,南京大学地理与海洋科学学院,江苏 南京 210023)
Research on Spectral Characteristics of Winter Typical Vegetation in Nanjing
Ma Donghui,Ke Changqing
(Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,
School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210023,China)
 全文: PDF(9025 KB)  
摘要:

利用FieldSpec4便携式地物光谱仪和ASD积分球,于2014年7月和12月对研究区6种典型植被进行光谱数据采集与处理,分析植被冠层和落叶的光谱特征及其变化规律,同时分析坡度因素、测量方法对植被光谱反射率的影响。结果表明:不同季节常绿植被光谱存在差异,不同植被光谱反射率的季节变化也不同。冬季常绿植被具有相似的光谱特征,但是不同植被类型之间也存在明显的差异。冬季植被冠层光谱呈现出先降低后稳定的特点;植被落叶层光谱由于受叶片色素、含水量、土壤背景等因素的影响,在衰老腐化的过程中并未出现明显的规律性变化。一定坡度范围内,植被光谱反射率随坡度的增大而升高。不同的测量方法获取的植被光谱反射率不同,但是光谱变化规律相同。

关键词: 冬季植被高光谱光谱测量光谱特征    
Abstract:

At present,the study on spectral characteristics of vegetation at home and abroad is more concentrated in summer or autumn,while this study on winter is relatively rare.In this paper,the Fieldspec4 portable spectrometer and ASD integrating sphere were adopted to collect spectrum data of the 6 typical vegetation in July and December,2014.Then canopy and defoliation reflectance of these vegetation were acquired.The spectral characteristics and variations of canopy and defoliation were analyzed,and the effects slope factor and measurement methods having on vegetation spectral reflectance also were investigated.The results indicated that evergreen vegetation had a difference in different seasons and the seasonal changes of different vegetation canopy spectrum were different.Winter evergreen vegetation with similar spectral features,whereas different vegetation had obvious differences.In winter,vegetation canopy spectrum first decreased and then stabilized.Because of being affected by several factors such as leaf pigment content,water content and soil background,vegetation defoliation spectrum didn’t show apparent regular changes during its senescence period.Within a certain slope range,vegetation spectral reflectance increased with increasing slope.The reflectance of vegetation spectrum by different measurement methods differed,while their variations kept the same.

Key words: Winter vegetation    Hyperspectral    Spectral measurement    Spectral characteristics
收稿日期: 2015-08-03 出版日期: 2016-10-14
:  P733.3  
基金资助:

国家自然科学基金项目(41371391)资助。

通讯作者: 柯长青(1969-),男,陕西丹凤人,教授,主要从事遥感及其应用研究。 Email:kecq@nju.edu.cn。    
作者简介: 马东辉(1991-),男,河南唐河人,硕士研究生,主要从事遥感及其应用研究。Email:madonghui_giser@163.com。
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引用本文:

马东辉,柯长青. 南京冬季典型植被光谱特征分析[J]. 遥感技术与应用, 2016, 31(4): 702-708.

Ma Donghui,Ke Changqing. Research on Spectral Characteristics of Winter Typical Vegetation in Nanjing. Remote Sensing Technology and Application, 2016, 31(4): 702-708.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2016.4.0702        http://www.rsta.ac.cn/CN/Y2016/V31/I4/702

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