Upscaling and Downscaling of Regional Methane Sources - rice agriculture as a case study

Methane (CH₄) is a potent greenhouse gas. Wetland rice fields constitute one of the major anthropogenic CH₄ sources but the source strength is surrounded by a large uncertainty. The work presented in this report aims at reducing the uncertainty in emissions from wetland rice fields by making independent estimates of regional CH₄ source strengths: "up-scaling" from the soil-rice ecosystem perspective and "down-scaling" from the atmosphere perspective.

Case studies in Java and the Philippines described the upscaling from point to regional scale, the Chinese case study focused on the regional to national scale. A process-based field scale model for CH₄ emissions from rice paddies was made, validated and coupled to a Geographic Information System to scale up regional CH₄ emissions from rice paddies. Potential land use changes for Java and China were quantified with a land use change model and predicted changes were evaluated using the CH₄ emission model, proxy methods and emission factors

Authors

Breemen N van , Denier van der Gon H , Veldkamp T , Verburg P , Bodegom P van , Goudriaan J , Leffelaar P , Stams F , Houweling S , Leleiveld J , Slanina S , Zhang Y

Specifications

Publication title: Upscaling and Downscaling of Regional Methane Sources - rice agriculture as a case study
Publication date: 11 October 2001
Publication type: Publication
Publication language: English
Product number: 90748