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	Quantitative estimation of the shrub canopy lai from atmosphere-corrected hj-1 ccd data in mu us sandland
	Chen Wei1,2,3; Cao ChunXiang1,2; He QiSheng1,2,3; Guo HuaDong4; Zhang Hao1,2,3; Li RenQiang5; Zheng Sheng1,2,3; Xu Min1,2,3; Gao MengXu1,2,3; Zhao Jian1,2,3
刊名	Science china-earth sciences
	2010-12-01
卷号	53页码:26-33
关键词	Shrub leaf area index inversion Hj-1 data Geometric-optical model Modtran Mu us sandland
ISSN号	1674-7313
DOI	10.1007/s11430-010-4127-4
通讯作者	Cao chunxiang(cao413@irsa.ac.cn)
英文摘要	The leaf area index (lai) is an important ecological parameter that characterizes the interface between vegetation canopy and the atmosphere. in addition, it is used by most process-oriented ecosystem models. this paper investigates the potential of hj-1 ccd data combined with linear spectral unmixing and an inverted geometric-optical model for the retrieval of the shrub lai in wushen banner of inner mongolia in the mu us sandland. modtran (moderate resolution atmospheric radiance and transmittance model) was used for atmospheric correction. shrubland was extracted using the threshold of the normalized difference vegetation index, with which water bodies and farmland were separated, in combination with a vegetation map of the people's republic of china (1:1000000). using the geometric-optical model, we derive the per-pixel reflectance as a simple linear combination of two components, namely sunlit background and other. the fraction of sunlit background is related to the shrub lai. with the support of hj-1 ccd data, we employ linear spectral unmixing to obtain the fraction of sunlit background in an atmospherically corrected hj image. in addition, we use the measured shrub canopy structural parameters for shrub communities to invert the geometric-optical model and retrieve the pixel-based shrub lai. in total, 18 sample plots collected in wushen banner of inner mongolia are used for validation. the results of the shrub lai show good agreement with r (2) of 0.817 and a root-mean-squared error of 0.173.
WOS关键词	LEAF-AREA INDEX ; BIDIRECTIONAL REFLECTANCE ; VEGETATION COVER ; RADIATION REGIME ; FOREST ; MODEL ; IKONOS ; ATTRIBUTES ; GRASSLANDS ; INVERSION
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000286000400004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2406826
专题	中国科学院大学
通讯作者	Cao ChunXiang
作者单位	1.Chinese Acad Sci, Inst Remote Sensing Applicat, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China 2.Beijing Normal Univ, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Earth Observat & Digital Earth, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, China Key Lab Ecol Network Observat & Modeling, Beijing 100101, Peoples R China 6.Ordos Forestry Sand Control Sci Inst, Dongsheng 017000, Peoples R China 7.Inner Mongolia Biomass Thermoelect Ltd Co, Wushen 017300, Peoples R China
推荐引用方式 GB/T 7714	Chen Wei,Cao ChunXiang,He QiSheng,et al. Quantitative estimation of the shrub canopy lai from atmosphere-corrected hj-1 ccd data in mu us sandland[J]. Science china-earth sciences,2010,53:26-33.
APA	Chen Wei.,Cao ChunXiang.,He QiSheng.,Guo HuaDong.,Zhang Hao.,...&Li JingLu.(2010).Quantitative estimation of the shrub canopy lai from atmosphere-corrected hj-1 ccd data in mu us sandland.Science china-earth sciences,53,26-33.
MLA	Chen Wei,et al."Quantitative estimation of the shrub canopy lai from atmosphere-corrected hj-1 ccd data in mu us sandland".Science china-earth sciences 53(2010):26-33.

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