Jinxun Liu C. Peng H. Chen X. Fang H. Jiang G. Yang D. Zhu W. Wang X. Zhou Qing Zhu 2014 A new process-based model TRIPLEX-GHG was developed based on the Integrated Biosphere Simulator (IBIS), coupled with a new methane (CH₄) biogeochemistry module (incorporating CH₄ production, oxidation, and transportation processes) and a water table module to investigate CH₄ emission processes and dynamics that occur in natural wetlands. Sensitivity analysis indicates that the most sensitive parameters to evaluate CH₄ emission processes from wetlands are r (defined as the CH₄ to CO₂ release ratio) and Q₁₀ in the CH₄ production process. These two parameters were subsequently calibrated to data obtained from 19 sites collected from approximately 35 studies across different wetlands globally. Being heterogeneously spatially distributed, r ranged from 0.1 to 0.7 with a mean value of 0.23, and the Q₁₀ for CH₄ production ranged from 1.6 to 4.5 with a mean value of 2.48. The model performed well when simulating magnitude and capturing temporal patterns in CH₄ emissions from natural wetlands. Results suggest that the model is able to be applied to different wetlands under varying conditions and is also applicable for global-scale simulations. application/pdf 10.5194/gmd-7-981-2014 en Copernicus Publications Modelling methane emissions from natural wetlands by development and application of the TRIPLEX-GHG model article