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Global parameterization and validation of a two-leaf light use efficiency model for predicting gross primary production across FLUXNET sites
Zhou Y. L.; Wu, X. C.; Ju, W. M.; Chen, J. M.; Wang, S. Q.; Wang, H. M.; Yuan, W. P.; Black, T. A.; Jassal, R.; Ibrom, A.; Han, S. J.; Yan, J. H.; Margolis, H.; Roupsard, O.; Li, Y. N.; Zhao, F. H.; Kiely, G.; Starr, G.; Pavelka, M.; Montagnani, L.; Wohlfahrt, G.; D'odorico, P.; Cook, D.; Arain, M. A.; Bonal, D.; Beringer, J.; Blanken, P. D.; Loubet, B.; Leclerc, M. Y.; Matteucci, G.; Nagy, Z.; Olejnik, J.; U, K. T. P.; Varlagin, A.
Source PublicationJournal of Geophysical Research-Biogeosciences
2016
Volume121
Issue4
Pages1045-1072
Keywordnet ecosystem exchange photosynthetically active radiation carbon-dioxide exchange terrestrial primary production eddy covariance technique water-vapor exchange ncep-ncar reanalysis land-surface model deciduous forest diffuse-radiation
AbstractLight use efficiency (LUE) models are widely used to simulate gross primary production (GPP). However, the treatment of the plant canopy as a big leaf by these models can introduce large uncertainties in simulated GPP. Recently, a two-leaf light use efficiency (TL-LUE) model was developed to simulate GPP separately for sunlit and shaded leaves and has been shown to outperform the big-leaf MOD17 model at six FLUX sites in China. In this study we investigated the performance of the TL-LUE model for a wider range of biomes. For this we optimized the parameters and tested the TL-LUE model using data from 98 FLUXNET sites which are distributed across the globe. The results showed that the TL-LUE model performed in general better than the MOD17 model in simulating 8 day GPP. Optimized maximum light use efficiency of shaded leaves (epsilon(msh)) was 2.63 to 4.59 times that of sunlit leaves (epsilon(msu)). Generally, the relationships of epsilon(msh) and epsilon(msu) with epsilon(max) were well described by linear equations, indicating the existence of general patterns across biomes. GPP simulated by the TL-LUE model was much less sensitive to biases in the photosynthetically active radiation (PAR) input than the MOD17 model. The results of this study suggest that the proposed TL-LUE model has the potential for simulating regional and global GPP of terrestrial ecosystems, and it is more robust with regard to usual biases in input data than existing approaches which neglect the bimodal within-canopy distribution of PAR.
Indexed BySCI
Language英语
ISSN2169-8953
DOI10.1002/2014jg002876
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document TypeSCI/SSCI论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/43440
Collection历年回溯文献
Recommended Citation
GB/T 7714
Zhou Y. L.,Wu, X. C.,Ju, W. M.,et al. Global parameterization and validation of a two-leaf light use efficiency model for predicting gross primary production across FLUXNET sites. 2016.
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