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地球科学进展  2012, Vol. 27 Issue (2): 165-174    DOI: 10.11867/j.issn.1001-8166.2012.02.0165
综述与评述     
全球LAI地面验证方法及验证数据综述
曾也鲁1,2,李静1*,柳钦火1
1.遥感科学国家重点实验室,中国科学院遥感应用研究所,北京100101;
2.中国科学院研究生院,北京100049
Global LAI Ground Validation Dataset and Product Validation Framework: A Review
Zeng Yelu1,2,Li Jing1,Liu Qinhuo1
1.State Key Laboratory of Remote Sensing Science,Institute of Remote Sensing Applications of Chinese Academy of Sciences,Beijing100101,China;
2.Graduate University of Chinese Academy of Sciences,Beijing100049,China
 全文: PDF(1031 KB)  
摘要:

叶面积指数(LAI)的地面验证是LAI反演算法研究及LAI产品验证的重要部分。近年来,为了验证遥感参数产品以及对大气、地表的系统性研究,国际上在全球主要大洲开展了多个针对主要植被类型的大型观测项目,逐渐形成了较完善的地面采样框架与全球尺度不同植被类型的地面验证数据集。国内外已开展的大型观测项目采用的采样框架对以后观测试验中LAI的地面验证框架的制定与研究具有重要的借鉴意义,同时,已观测到的全球LAI地面验证数据集是开展全球LAI算法及产品验证的基础数据集,因此,有必要对目前全球LAI地面验证方法及验证数据情况做个综述。首先综述全球主要LAI地面观测项目及其所采用的地面验证框架。在此基础上,分析比较各大观测项目中所采用的地面测量方法、采样方法及像元真值估算方法。最后,指出全球LAI产品地面验证中存在的不足,并对尚需进一步研究的方向进行展望。

关键词: 叶面积指数(LAI)地面验证采样方法    
Abstract:

The LAI ground measurement is an important support to the LAI retrieval method research and LAI products validation. In recent years, in order to validate the satellite products and improve the understanding of the atmosphere and land surface process system, many global-scale or continental-scale ground observing programs were organized, such as the FIFE, BOREAS, PROVE programs in Europe and North America, and Heihe, Shunyi, Xilinhaote in China. Through these programs, a product validation framework, which solves the problem of scale difference between ground point measurement and the pixel, was developed. Under this framework, a global-scale LAI validation dataset for different vegetation types have come into being gradually. In this paper, firstly, we investigated some large-scale ground observing programs, which have the standard measuring principle and share the dataset well. Secondly, we summarized the product validation framework, including the ground observing techniques, the sampling strategies and the pixel true value estimation methods. And then we made a short introduction to the global LAI validation dataset we collected from those well-shared observing programs, including the affiliated parameter dataset. Finally we made a prospect on the LAI sampling method and the global validation.

Key words: Leaf Area Index (LAI)    Ground-based validation    Sampling strategy
收稿日期: 2011-08-27 出版日期: 2012-02-10
:  P23  
基金资助:

国家自然科学基金青年基金项目“基于叶片和棉花棉套组分的模型改进及棉花棉絮量反演方法研究”(编号:40801143);国家自然科学基金重点项目“光学与微波遥感的模型协同及联合反演研究”(编号:40730525);国家高技术研究发展计划项目“全球陆表特征参量产品生成与应用研究”(编号:2009AA122102)资助.

通讯作者: 李静(1978-),女,黑龙江齐齐哈尔人,副研究员,主要从事植被辐射传输模型、叶面积指数反演等研究.     E-mail: lijing@irsa.ac.cn
作者简介: 曾也鲁(1989-),男,重庆垫江人,硕士研究生,主要从事叶面积指数研究. E-mail:zengyelu@163.com
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引用本文:

曾也鲁,李静,柳钦火. 全球LAI地面验证方法及验证数据综述[J]. 地球科学进展, 2012, 27(2): 165-174.

Zeng Yelu,Li Jing,Liu Qinhuo. Global LAI Ground Validation Dataset and Product Validation Framework: A Review. Advances in Earth Science, 2012, 27(2): 165-174.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2012.02.0165        http://www.adearth.ac.cn/CN/Y2012/V27/I2/165

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