The newly developed methods to mitigate greenhouse gas emission will be evaluated from a wide range of perspectives; from field scale monitoring to global scale modeling, life cycle assessment (LCA), and ethical, legal and social implications (ELSI). In addition, N₂O and CH₄ production pathway, the rates of N₂O reduction and CH₄ oxidation will be estimated by using stable isotopes.
V1: Field experiment
The project will conduct field experiments of the greenhouse gas mitigation options developed by Tasks 2, 3, and 4.
V2: Evaluation of N₂O and CH₄ production and consumption using stable isotopes
The project will elucidate N₂O production pathways and evaluate reduction rates from N₂O to N₂ using natural abundance of stable isotope and 15N tracer experiments. In addition, oxidation rates from CH₄ to CO₂ will be evaluated using natural abundance of stable isotope and 13C tracer experiments.
V3a: Life Cycle Assessment (LCA)
The project will conduct LCA of the new mitigation options of greenhouse gas developed by Tasks 2, 3, and 4 (Fig).
V3b: Ethical, Legal and Social Implications (ELSI)
The project will investigate the ethical, legal, social and policy issues that arise from our Moonshot project.
V4: Biogeochemical model
The project will estimate N₂O mitigation potential in East Asia and the world by using the biogeochemical model (VISIT model) developed by the National Institute for Environmental Studies.
Fig. Measurement of greenhouse gas flux using an automatic greenhouse gas sampling system in the soybean field experiment