Journal
ECOLOGICAL MODELLING
Volume 292, Issue -, Pages 1-10Publisher
ELSEVIER
DOI: 10.1016/j.ecolmodel.2014.08.017
Keywords
Light use efficiency; Gross primary production; Model parameters
Categories
Funding
- National Science Foundation for Excellent Young Scholars of China [41322005]
- National High Technology Research and Development Program of China (863 Program) [2013AA122003]
- Program for New Century Excellent Talents in University [NCET-12-0060]
- LCLUC Program of NASA
- Fundamental Research Funds for the Central Universities
- CFCAS
- NSERC
- BIOCAP
- Environment Canada
- NRCan
- GHG-Europe
- FAO-GTOS-TCO
- iLEAPS
- Max Planck Institute for Biogeochemistry
- National Science Foundation
- University of Tuscia
- Universite Laval
- US Department of Energy
Ask authors/readers for more resources
Models of gross primary production (GPP) based on remote sensing measurements are currently parameterized with vegetation-specific parameter sets and therefore require accurate information on the distribution of vegetation to drive them. Can this parameterization scheme be replaced with a vegetation-invariant set of parameters that can maintain or increase model applicability by reducing errors introduced from the uncertainty of land cover classification? Based on the measurements of ecosystem carbon fluxes from 168 globally distributed sites in a range of vegetation types, we examined the predictive capacity of seven light use efficiency (LUE) models. Two model experiments were conducted: (i) a constant set of parameters for various vegetation types and (ii) vegetation-specific parameters. The results showed no significant differences in model performance in simulating GPP while using both set of parameters. These results indicate that a universal of set of parameters, which is independent of vegetation cover type and characteristics can be adopted in prevalent LUE models. Availability of this well tested and universal set of parameters would help to improve the accuracy and applicability of LUE models in various biomes and geographic regions. (C) 2014 Elsevier B.V. All rights reserved.
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