Technology and Methodology |
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THE RETRIEVAL OF FOREST CHLOROPHYLL CONCENTRATION BASED ON FOLIAR SPECTRA |
JIAO Quan-Jun, ZHANG Xia, ZHANG Bing, WEI Zheng, ZHENG Lan-Fen |
State Key Lab of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101,China |
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Abstract The accurate estimation of foliar chlorophyll concentration contributes to our need for further understanding of forest ecosystem. Two approaches, namely, indices and partial lease squares regression, were used to retrieve foliar chlorophyll concentration, both of which are based on the spectra and chemical variables of main tree species in Qianyanzhou forest. Common hyperspectral indices were used to set up the regression model, and a new index, Chlorophyll Absorption Area Index (CAAI), was created. The results show that the indices TCARI and CAAI have stronger ability for predicting chlorophyll concentration, and the predicted model constructed by the PLS method can be used to explain the capability of these indices.
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Issue Date: 10 September 2009
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