Estimation of forest canopy nitrogen content based on remote sensing

doi:10.3724/SP.J.1010.2012.00536

IOCAS-IR > 海洋地质与环境重点实验室

	Estimation of forest canopy nitrogen content based on remote sensing
	Yang Xi-Guang 1,3; Yu Ying 2; Huang Hai-Jun 1; Fan Wen-Yi 2; Huang, HJ (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
	2012-12-01
发表期刊	JOURNAL OF INFRARED AND MILLIMETER WAVES
ISSN	1001-9014
卷号	31 期号:6 页码:536-543
文章类型	Article
摘要	Hypespectral data was used to estimate leaf and canopy nitrogen content. Erf-BP, an improved model based on the Gaussian error function of BP neural network, was used to develop remote sensing models for estimating leaf nitrogen content. Then the scaling conversion function during downscales from canopy to leaf spectral was derived according to principles of geometric optics model. These relations were used during downscales from the canopy reflectance of Hyperion image to leaf spectral for leaf nitrogen content estimation. Finally, forest structural parameter leaf area index (LAI) was used to obtain canopy nitrogen content from leaf level. The results showed that the best Erf-BP. neural network model with testing accuracy of 76.8597% includes 8 neurons in hidden layer. Using scaling conversion function to estimate canopy spectra at 670nm and 865nm, correlations (R-2) between modeling spectra and measurements were 0.5203 and 0.4117 respectively. Correlation coefficient between estimated leaf nitrogen content and measurements was 0.7019. This method provides a good reference for more rapid and accurate estimation of leaf and canopy nitrogen.
关键词	Hyperspectral Remote Sensing Nitrogen Content 4-scale Model
学科领域	Optics
DOI	10.3724/SP.J.1010.2012.00536
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000313473900011
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/12499
专题	海洋地质与环境重点实验室
通讯作者	Huang, HJ (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.NE Forestry Univ, Harbin 150040, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Yang Xi-Guang,Yu Ying,Huang Hai-Jun,et al. Estimation of forest canopy nitrogen content based on remote sensing[J]. JOURNAL OF INFRARED AND MILLIMETER WAVES,2012,31(6):536-543.
APA	Yang Xi-Guang,Yu Ying,Huang Hai-Jun,Fan Wen-Yi,&Huang, HJ .(2012).Estimation of forest canopy nitrogen content based on remote sensing.JOURNAL OF INFRARED AND MILLIMETER WAVES,31(6),536-543.
MLA	Yang Xi-Guang,et al."Estimation of forest canopy nitrogen content based on remote sensing".JOURNAL OF INFRARED AND MILLIMETER WAVES 31.6(2012):536-543.

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