2014 Fiscal Year Final Research Report
Global budget analysis of nitrous oxide based on top-down approach using a chemistry trasnport model
| Project/Area Number |
23710034
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
ISHIJIMA Kentaro 独立行政法人海洋研究開発機構, 地球表層物質循環研究分野, 研究員 (90399494)
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Keywords | 一酸化二窒素 / トップダウン / 放出量 / 推定 / 逆計算 / モデル / 観測 |
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| Outline of Final Research Achievements |
We have developed a chemistry transport model to simulate atmospheric nitrous oxide (N2O) by incorporating photochemical reactions for N2O and ozone in an atmospheric general circulation model. This model showed nice performance compared to other models in an intercomparison of atmospheric N2O models (TransCom-N2O), and thereby it was expected that inverse modeling by the model could be also reliable. We estimated seasonal variations of regional N2O emissions by inverse modeling, and the temporal tendencies were different from the prior emissions, indicating that agricultural fertilization and/or thaw could be a cause for them, and necessity to improve precision of the N2O inverse modeling by expansion of N2O observation network. In addition to such modeling, we also made a new observation data set of atmospheric N2O, which resulted in contributing to N2O inverse modeling studies.
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| Free Research Field |
大気化学
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