A Monte Carlo-based calibration and uncertainty assessment was performed for heat, water and carbon (C) fluxes, simulated by a soil-plant-atmosphere system model (CoupModel), in mown grassland. Impact of different multi-objective and multi-criteria constraints was investigated on model performance and parameter behaviour. Good agreements between hourly modelled and measurement data were obtained for latent and sensible heat fluxes (R-2 = 0.61, ME = 0.48 MJ m(-2) day(-1)), soil water contents (R-2 = 0.68, ME = 0.34%) and carbon-dioxide flux (R-2 = 0.60, ME = -0.18 g C m(-2) day(-1)). Multi-objective and multi criteria constraints were efficient in parameter conditioning, reducing simulation uncertainty and identifying critical parameters. Enforcing multi-constraints separately on heat, water and C processes resulted in the highest model improvement for that specific process, including some improvement too for other processes. Imposing multi-constraints on all groups of variables, associated with heat, water and C fluxes together, resulted in general effective parameters conditioning and model improvement. (C) 2016 Elsevier Ltd. All rights reserved.
This work was supported financially by the European community's Seventh Framework Programme (FP2007-2013) under grant agreement n° 262060 (ExpeER). The research leading to these results has received funding principally from the National Research Infrastructure “Agro-écosystèmes, Cycles Biogéochimique et Biodiversité” (ANR-11-INBS-0001) (SOERE-ACBB http://www.soere-acbb.com/fr/), Allenvi and ICOS France. We are grateful to Christophe de-Berranger, Cédric Perrot and Xavier Charrier for technical and field work assistance. We thank the anonymous Reviewers and Associate Editor for their valuable comments and suggestions that help us to improve the manuscript.
- Modelling heat, water, carbon flux
- Multi-objective and multi-criteria constraints
- Model performance
- Parameter uncertainty
- Pasture simulation-model
- Scots Pine ecosystem
- Soil carbon
- Terrestrial carbon
- NET carbon
- Bare soil