DOI: 10.1002/2016JD025892
论文题名: Polarized reflectance factors of vegetation covers from laboratory and field: A comparison with modeled results
作者: Sun Z. ; Wu D. ; Lv Y. ; Zhao Y.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 1042
结束页码: 1065
语种: 英语
英文关键词: polarimetric models
; polarized reflectance factor
; remote sensing
; vegetation canopies
Scopus关键词: atmosphere
; canopy reflectance
; data set
; field method
; laboratory method
; light scattering
; numerical model
; one-dimensional modeling
; polarization
; remote sensing
; vegetation cover
英文摘要: Light scattered from surfaces is partly polarized, which has implications for remote sensing of vegetation. To study the contribution of polarized light to multiangular reflectance over vegetation covers, we produced a hyperspectral bidirectional polarized reflectance data set for four types of vegetation cover acquired over a wide-viewing range in the laboratory and field. The data sets were analyzed with respect to basic physical polarized reflectance mechanisms. Moreover, we compared the modeled polarization from five existing polarimetric models (1-D) with our measured polarization of vegetation covers at selected wavelengths. The analyses indicated that our measured polarized reflectance factors of a special vegetation cover, in which the leaves of vegetation were horizontally oriented, were much greater than previous results. All of the models produced good fits to the measurements, except for the special vegetation cover, which leaded to markedly different distribution patterns for the five models. We also found that the maximum relative difference between modeled and measured polarization was in the backward scattering direction near the principal plane. These results suggested that we can model the polarization accurately by using the existing polarimetric models in visible and near-infrared bands; more measurements should be performed in the laboratory and the field to illustrate the inherent polarization property of vegetation covers and to avoid underestimating the contribution of vegetation covers on the polarization of atmosphere in the polarized remote sensing study. Our study not only deepens our understanding of the scattering properties of vegetation covers but also provides the polarization properties of vegetated surfaces for the study of atmosphere polarization. ©2016. American Geophysical Union. All Rights Reserved. 资助项目: 41401379
; 41571343
; 41671347
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62736
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: School of Geographical Science, Northeast Normal University, Changchun, China; Air and Space Information Department, Air Force Aviation University, Changchun, China; College of Urban and Environmental Science, Changchun Normal University, Changchun, China
Recommended Citation:
Sun Z.,Wu D.,Lv Y.,et al. Polarized reflectance factors of vegetation covers from laboratory and field: A comparison with modeled results[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)