首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Linkage of MIKE SHE to Wetland-DNDC for carbon budgeting and anaerobic biogeochemistry simulation
Authors:Email author" target="_blank">Jianbo?CuiEmail author  Changsheng?Li  Ge?Sun  Carl?Trettin
Institution:(1) Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, 03824 >Durham, NH, USA;(2) Department of Forestry, North Carolina State University, 27606 Raleigh, NC, USA;(3) Forest Service, Center for Forested Wetlands Research, USDA, 29414 Charleston, SC, USA;(4) Present address: Ecological Modelling and Carbon Science Laboratory, Institut des sciences de l‘environnement, Université du Qubéc à Montréal, succursale Centre-Ville, Case Postale 8888, H3C 3P8 (Quebec), Montreal, Canada
Abstract:This study reports the linkage between MIKE SHE and Wetland-DNDC for carbon dynamics and greenhouse gases (GHGs) emissions simulation in forested wetland.Wetland-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, while CO2 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 CO2 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.
Keywords:Biogeochemical modeling  Carbon dynamics  Forest wetland  Greenhouse gases emission  Mitigation strategies
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号