DOI: 10.1016/j.jag.2016.08.002
Scopus记录号: 2-s2.0-85004008133
论文题名: Measuring the response of canopy emissivity spectra to leaf area index variation using thermal hyperspectral data
作者: Neinavaz E ; , Darvishzadeh R ; , Skidmore A ; K ; , Groen T ; A
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2016
卷: 53 起始页码: 40
结束页码: 47
语种: 英语
英文关键词: Emissivity spectra
; Hyperspectral
; Leaf area index
; Thermal infrared
; Vegetation
Scopus关键词: canopy
; emissivity
; leaf area index
; multispectral image
; spectral reflectance
; vegetation
英文摘要: One of the plant biophysical factors affecting the canopy spectral reflectance of plants in the optical domain to receive research attention in recent decades is leaf area index (LAI). Although it is expected that the value of LAI affects the emission of radiation, it not known how. To our knowledge, the effect of LAI on plant canopy emissivity spectra has not yet been investigated in the thermal infrared region (TIR 8–14 μm). The overall aim of this study was to demonstrate the effect of LAI on canopy emissivity spectra of different species at the nadir position. The 279 spectral wavebands in the TIR domain were measured under controlled laboratory condition using a MIDAC spectrometer for four plant species. The corresponding LAI of each measurement was destructively calculated. We found a positive correlation between canopy emissivity spectra at various LAI values, indicating that emissivity increases concomitantly with LAI value. The canopy emissivity spectra of the four species were found to be statistically different at various wavebands even when the LAI values of the species were similar. It seems that other biophysical or biochemical factors also contribute to canopy emissivity spectra: this merits further investigation. We not only quantify the role of LAI on canopy emissivity spectra for the first time, but also demonstrate the potential of using hyperspectral thermal data to estimate LAI of plant species. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80113
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Natural Resources Science, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, Enschede, Netherlands
Recommended Citation:
Neinavaz E,, Darvishzadeh R,, Skidmore A,et al. Measuring the response of canopy emissivity spectra to leaf area index variation using thermal hyperspectral data[J]. International Journal of Applied Earth Observation and Geoinformation,2016-01-01,53