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Investigation of the lightning using numerical model and radiation detection observation

Research Project

Project/Area Number 17K05659
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionHokkaido University (2019)
Nagoya University (2017-2018)

Principal Investigator

Sato Yousuke  北海道大学, 理学研究院, 特任准教授 (10633505)

Co-Investigator(Kenkyū-buntansha) 榎戸 輝揚  国立研究開発法人理化学研究所, 開拓研究本部, 理研白眉研究チームリーダー (20748123)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords雷放電 / 気象モデル / 雲物理 / 数値気象モデル / 放射線計測 / 雷 / 大気現象
Outline of Final Research Achievements

Firstly, the vertical structure of the charge density in the tropical cyclone (TC) was reproduced by using a meteorological model, which explicitly calculates the charge density of cloud and lightning. The effects of the aerosols on the charge density and lightning frequency were investigated through sensitivity experiments to the aerosol number concentration. Second, the relationship between TC's lifecycle and the lightning frequency reported by previous observational studies was reproduced by the model. Our analyses elucidated the reason of the relationship between the TC's lifecycle and the lightning frequency. Third, we accumulated observational data of the gamma ray emitted from lightning cloud. The data is useful for improving the meteorological model developed in this study.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、雷を直接計算した気象モデルで、台風を網羅できるほどの高領域で大規模な数値実験を実行できるようになった。また、数値実験により観測的研究から指摘されていた、台風のライフサイクルと台風周辺の発雷頻度を気象モデル再現でき、その原因を明らかにできた。さらに、今後雷を考慮した気象モデルによる雷予測の精度の向上させるために必要な、雷雲から放出される高エネルギーガンマ線のデータを蓄積することができた。これらは台風の強度予測に資する知見になる可能性があるだけでなく、現在の天気予報では予報されていない雷を、将来的に予報するための技術開発が一歩進んだことを意味し、人間生活の利益に資する研究である。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Large dependency of charge distribution in a tropical cyclone inner core upon aerosol number concentration2019

    • Author(s)
      Sato Yousuke、Miyamoto Yoshiaki、Tomita Hirofumi
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 6 Issue: 1

    • DOI

      10.1186/s40645-019-0309-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gamma-ray glow preceding downward terrestrial gamma-ray flash2019

    • Author(s)
      Wada Yuuki、Enoto Teruaki、Nakamura Yoshitaka、Furuta Yoshihiro、Yuasa Takayuki、Nakazawa Kazuhiro、Morimoto Takeshi、Sato Mitsuteru、Matsumoto Takahiro、Yonetoku Daisuke、Sawano Tatsuya、Sakai Hideo、Kamogawa Masashi、Ushio Tomoo、Makishima Kazuo、Tsuchiya Harufumi
    • Journal Title

      Communications Physics

      Volume: 2 Issue: 1 Pages: 67-67

    • DOI

      10.1038/s42005-019-0168-y

    • NAID

      120006647300

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Downward Terrestrial Gamma-Ray Flash Observed in a Winter Thunderstorm2019

    • Author(s)
      Wada Y.、Enoto T.、Nakazawa K.、Furuta Y.、Yuasa T.、Nakamura Y.、Morimoto T.、Matsumoto T.、Makishima K.、Tsuchiya H.
    • Journal Title

      Physical Review Letters

      Volume: 123 Issue: 6 Pages: 061103-061103

    • DOI

      10.1103/physrevlett.123.061103

    • NAID

      120007185892

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Relationship between lifecycle of tropical cyclone and lightning frequency ~an insight from a numerical simulation~2019

    • Author(s)
      Yousuke Sato, Yoshiaki Miyamoto, Hirofumi Tomita
    • Organizer
      AGU Fall meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical study on lightning frequency in a tropical cyclone (TC)2019

    • Author(s)
      Yousuke Sato, Yoshiaki Miyamoto, Hirofumi Tomita
    • Organizer
      JpGU Annual meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 台風内部の雷構造に関する数値考察2019

    • Author(s)
      佐藤陽祐、宮本佳明、富田浩文
    • Organizer
      日本気象学会2019年度春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 台風内の雷構造にエアロゾルが与える影響2019

    • Author(s)
      佐藤陽祐、宮本佳明、富田浩文
    • Organizer
      日本気象学会2019年度秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 次世代気象機構ライブラリで利用可能な雷モデルの開発2019

    • Author(s)
      佐藤陽祐
    • Organizer
      日本気象学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Development of lightning model on a next generation library for weather and climate model, SCALE2018

    • Author(s)
      Yousuke Sato, Hirofumi Tomita
    • Organizer
      XVI International Conference on Atmospheric Electricity
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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