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author:

Xu, Z. (Xu, Z..) [1] | Zhang, C. (Zhang, C..) [2] | Xiang, S. (Xiang, S..) [3] | Chen, L. (Chen, L..) [4] | Yu, X. (Yu, X..) [5] | Li, H. (Li, H..) [6] | Li, Z. (Li, Z..) [7] | Guo, X. (Guo, X..) [8] | Zhang, H. (Zhang, H..) [9] | Huang, X. (Huang, X..) [10] | Guan, F. (Guan, F..) [11]

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Scopus

Abstract:

Leaf area index (LAI) and chlorophyll content are crucial variables in photosynthesis, respiration, and transpiration, playing a vital role in monitoring vegetation stress, estimating productivity, and evaluating carbon cycling processes. Currently, physical models are widely adopted for estimating LAI and canopy chlorophyll content (CCC). However, the main challenges of physical model-based methods for estimating LAI and CCC are the high computational cost and the fact that different combinations of canopy variables result in similar spectral reflectance for local minima. To address this limitation, a hybrid model was proposed to invert the LAI and CCC in Moso bamboo (Phyllostachys pubescens) forests. This approach utilized the PROSAIL canopy radiation transfer model, established look-up table (LUT) for LAI and CCC, and employed the Stacking ensemble learning framework. Compared to the PROSAIL LUT method, the hybrid model demonstrated higher performance in predicting LAI and CCC by incorporating the strengths of different models within the hybrid framework. The R2 values between predicted and measured values were improved by 3.28% and 7.15%, while the RMSE values were reduced by 19.71% and 16.14%, respectively. Moreover, the hybrid model based on Stacking ensemble learning achieved an 86% reduction in running time. Therefore, the hybrid model, which integrates the PROSAIL model with the Stacking ensemble learning framework, offers a more efficient and accurate approach for remotely estimating the LAI and CCC in Moso bamboo forests. The high efficiency of this method makes it promising and suitable for application to other types of vegetation.  © 2008-2012 IEEE.

Keyword:

Canopy chlorophyll content (CCC) hybrid method leaf area index (LAI) moso bamboo forests prosail RTM

Community:

  • [ 1 ] [Xu Z.]Fuzhou University, College of Environment and Safety Engineering and the Academy of Digital China, Fuzhou, 350108, China
  • [ 2 ] [Zhang C.]Fuzhou University, College of Environment and Safety Engineering and the Academy of Digital China, Fuzhou, 350108, China
  • [ 3 ] [Xiang S.]Fuzhou University, College of Environment and Safety Engineering and the Academy of Digital China, Fuzhou, 350108, China
  • [ 4 ] [Chen L.]Fuzhou University, College of Environment and Safety Engineering and the Academy of Digital China, Fuzhou, 350108, China
  • [ 5 ] [Yu X.]Fuzhou University, College of Environment and Safety Engineering and the Academy of Digital China, Fuzhou, 350108, China
  • [ 6 ] [Li H.]Fuzhou University, College of Environment and Safety Engineering and the Academy of Digital China, Fuzhou, 350108, China
  • [ 7 ] [Li Z.]Fujian Prov. Key Lab. of Rsrc. and Environment Monitoring Sustainable Management and Utilization, Sanming, 365004, China
  • [ 8 ] [Li Z.]SEGi University, Faculty of Education, Kota Damansara, 47810, Malaysia
  • [ 9 ] [Guo X.]Fujian Prov. Key Lab. of Rsrc. and Environment Monitoring Sustainable Management and Utilization, Sanming, 365004, China
  • [ 10 ] [Zhang H.]Xiamen Administration Center of Afforestation, Xiamen, 361004, China
  • [ 11 ] [Huang X.]Guangdong Academy of Agricultural Sciences, Institute of Agricultural Economics and Information, Guangzhou, 510000, China
  • [ 12 ] [Guan F.]Key Laboratory of National Forestry and Grassland Administration, International Center for Bamboo and Rattan, Beijing, 100102, China

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Source :

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

ISSN: 1939-1404

Year: 2024

4 . 7 0 0

JCR@2023

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ESI Highly Cited Papers on the List: 0 Unfold All

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