Modelling methane emissions from natural wetlands by development and application of the TRIPLEX-GHG model

Geoscientific Model Development
By: , and 

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Abstract

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.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Modelling methane emissions from natural wetlands by development and application of the TRIPLEX-GHG model
Series title Geoscientific Model Development
DOI 10.5194/gmd-7-981-2014
Volume 7
Year Published 2014
Language English
Publisher Copernicus Publications
Contributing office(s) Western Geographic Science Center
Description 19 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geoscientific Model Development
First page 981
Last page 999