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Integrated evaluation of reactive nitrogen pollution risks at global scale and its future projections

Research Project

Project/Area Number 18K11672
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 63040:Environmental impact assessment-related
Research InstitutionNational Institute for Environmental Studies

Principal Investigator

Nishina Kazuya  国立研究開発法人国立環境研究所, 地球システム領域, 主任研究員 (60637776)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords反応性窒素 / 地球臨界点 / 富栄養化 / 大気質 / 水質 / 健康影響 / 環境リスク / 潜在リスクマップ / プラネタリーバウンダリー / 統合的窒素管理 / 機械学習
Outline of Final Research Achievements

The purpose of this study was to assess the risks posed by excess reactive nitrogen. First, a database of observation points exceeding environmental standards for water quality (nitrate concentrations in rivers and groundwater) and air quality (nitrogen oxide concentrations), which indicate the status of contamination, was created from the past to the present. Information was also collected on observed cases of harmful algal blooms and methemoglobinemia in humans and animals as impact variables. Using these databases, risk maps were created for each item using multiple distribution estimation models based on environmental variables to identify potential risks even in areas where no observations were made.

Academic Significance and Societal Importance of the Research Achievements

本研究で作成したデータベースおよび機械学習モデルにより、これまでに明らかでなかった過去から現在に渡っての反応性窒素複合リスクの時空間分布が明らかになった。特に、大気質、水質、観測が手薄であるグローバル・サウスにおける潜在リスクについて、定量的評価が行うことができるようになった。また地下水質の潜在リスクの高い地域は、家畜のメトヘモグロビン血症の確率も高い傾向にあることが示された。今後、このアプローチを用いることによって、対策技術導入時のリスク低減効果や、反応性窒素複合リスク曝露人口の推計などを行い、反応性窒素の統合管理に向けた政策提言に資する研究を行うことが可能になった。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 Other

All Int'l Joint Research (5 results) Journal Article (2 results) Presentation (1 results) (of which Invited: 1 results)

  • [Int'l Joint Research] Peking University(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] IIASA(オーストリア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] IIASA(オーストリア)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Environmental Protection Agency(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Institute of Soil Science, CAS/Zhejiang University(中国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] New ammonia demand: ammonia fuel as a decarbonization tool and a new source of reactive nitrogen2022

    • Author(s)
      Nishina Kazuya
    • Journal Title

      Environmental Research Letters

      Volume: 17 Issue: 2 Pages: 021003-021003

    • DOI

      10.1088/1748-9326/ac4b74

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Historical trends of riverine nitrogen loading from land to the East China Sea: a model-based evaluation2021

    • Author(s)
      Nishina K、Ito A、Zhou F、Yan X、Hayashi S、Winiwarter W
    • Journal Title

      Environmental Research Communications

      Volume: 3 Issue: 8 Pages: 085005-085005

    • DOI

      10.1088/2515-7620/ac1ce8

    • Related Report
      2021 Annual Research Report
  • [Presentation] 全球~地域スケールの生物地球化学モデルによる窒素フロー解析2021

    • Author(s)
      仁科一哉
    • Organizer
      日本土壌肥料学会2021年度北海道大会
    • Related Report
      2021 Annual Research Report
    • Invited

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Published: 2018-04-23   Modified: 2023-01-30  

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