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Linkage of mike she to wetland-dndc for carbon budgeting and anaerobic biogeochemistry simulationAuthor(s): Jianbo Cui; Changsheng Li; Ge Sun; Carl Trettin
Source: Biogeochemistry. 72: 147-167.
Publication Series: Scientific Journal (JRNL)
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DescriptionThis study reports the linkage between MIKE SHE and Wetland-DNDC for carbon dynamics and greenhouse gases (GHGs) emissions simulation in forested wetland.Wet1and-DNDC was modified by parameterizing management measures, refining anaerobic biogeochemical processes, and was linked to the hydrological model - MIKE SHE. As a preliminary application, we simulated the effect of water table position and forest management practices on GHGs emissions and carbon dynamics to test the capabilities of the models for simulating seasonal and long-term carbon budget. Simulation results show that water table changes had a remarkable effect on GHGs fluxes. Anaerobic conditions in forested wetland soils reduce organic matter decomposition and stimulate CH4 production. Decrease in the water table from the wetland surface decreases methane flux, whife C02 emission was lower with a rise in the water table. When there is a drop in water availability, wetlands can become a net source of atmospheric C02 as photosynthesis is decreased and respiration loss enhanced. Forest management activities i.e. harvest, fertilization and reforestation practices were parameterized in the model. We predicted carbon fluxes and stores on a pine forest under different forest management scenarios during 160 years. Results show that average long-term carbon storage in ecosystem pools increased with increasing rotation length; Soil carbon showed only minor, long-term responses to harvesting events. In contrast, carbon sequestered in tree biomass and litter fluctuated widely, in concert with the harvest cycle. Application of nitrogen fertilizer increased average carbon storage in all ecosystem pools and wood products. We presented the linkage of MIKE SHE and Wetland-DNDC as a way to use of simulation modeling tools for assessing GHGs mitigation strategies, carbon budgeting and forest management.
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CitationCui, Jianbo; Li, Changsheng; Sun, Ge; Trettin, Carl. 2005. Linkage of mike she to wetland-dndc for carbon budgeting and anaerobic biogeochemistry simulation. Biogeochemistry. 72: 147-167.
KeywordsBiogeochemical modeling, carbon dynamics, forest wetland, greenhouse gases emission, mitigation strategies
- Effect of assessment scale on spatial and temporal variations in CH4, C02, and N20 fluxes in a forested wetland
- Modeling impacts of management on carbon sequestration and trace gas emissions in forested wetland ecosystems
- An integrated model of soil, hydrology, and vegetation for carbon dynamics in wetland ecosystems
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