• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

multi-scale interactions between atmospheric turbulence and cumulus convection

Research Project

Project/Area Number 19H01974
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Nishizawa Seiya  国立研究開発法人理化学研究所, 計算科学研究センター, 上級研究員 (40447892)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords大気乱流 / 積雲対流 / スケール間相互作用 / 対流
Outline of Research at the Start

大気乱流は、それによる熱や水蒸気等の混合を通じて、より大きなスケールの大気現象に影響を与えることが知られている。しかしながら、その時空間スケールの小ささから、観測や実験が容易ではなく、大気乱流が関わるスケール間相互作用については、まだまだ未解明な部分が多く残されている。本研究では、積雲対流と大気乱流を同時に表現する大規模数値シミュレーションにより、地表面付近や雲内の乱流と積雲対流の間の相互影響について、そのメカニズムを解明するとともに、その量的評価を行う。これにより、これまで考えることが難しかった大気乱流を含む大気現象のスケール間相互作用という新しい研究領域の開拓を行う。

Outline of Final Research Achievements

This study aimed to understand the interaction between atmospheric turbulence, which has a scale of less than O(1 km), and cumulus convection, which has a scale of O(10 km). Multiple large-eddy simulation experiments were conducted to explicitly resolve both atmospheric turbulence and cumulus convection, and the relationship between the two was analyzed from multiple perspectives. As a result, we were able to clarify the contribution of turbulence caused by small-scale topography and turbulence in the boundary layer to cumulus convection and its self-organization. On the other hand, a comprehensive understanding of their interaction has not yet been achieved, and further research is needed.

Academic Significance and Societal Importance of the Research Achievements

大気乱流の研究は、これまで乾燥大気を対象としたものが多かった。一方で、積雲対流は相変化を伴う湿潤過程を含んでおり、極めて非線形性の高い現象である。本研究で、乱流の影響が、湿潤過程を通じて増幅される効果があることが分かった。これらの知見により、今後、大気乱流の研究において、これまでの乾燥大気における大気乱流研究を超えた、新しい展開が開けることが期待される。

Report

(5 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (10 results)

All 2023 2021 2020 2019

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Overcoming computational challenges to realize meter- to submeter-scale resolution in cloud simulations using the super-droplet method2023

    • Author(s)
      Matsushima Toshiki、Nishizawa Seiya、Shima Shin-ichiro
    • Journal Title

      Geoscientific Model Development

      Volume: 16 Issue: 21 Pages: 6211-6245

    • DOI

      10.5194/gmd-16-6211-2023

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of sub-mesoscale topography on daytime precipitation associated with thermally driven local circulations over a mountainous region2021

    • Author(s)
      Nishizawa Seiya, Yamaura Tsuyoshi, Kajikawa Yoshiyuki
    • Journal Title

      Journal of the Atmospheric Sciences

      Volume: 78 Pages: 2511-2532

    • DOI

      10.1175/jas-d-20-0332.1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Intra-cloud Microphysical Variability Obtained from Large-eddy Simulations using the Super-droplet Method2021

    • Author(s)
      T. Matsushima, S. Nishizawa, S. Shima, W. Grabowski
    • Journal Title

      Earth and Space Science Open Archive

      Volume: - Pages: 1-17

    • DOI

      10.1002/essoar.10508672.1

    • Related Report
      2021 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Journal Article] New Critical Length for the Onset of Self‐Aggregation of Moist Convection2020

    • Author(s)
      Yanase Tomoro、Nishizawa Seiya、Miura Hiroaki、Takemi Tetsuya、Tomita Hirofumi
    • Journal Title

      Geophysical Research Letters

      Volume: 47 Issue: 16 Pages: 1-8

    • DOI

      10.1029/2020gl088763

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] ニューラルネットワーク代理モデルを用いた4次元変分法データ同化2021

    • Author(s)
      西澤誠也
    • Organizer
      気象学会2021年度秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Influence of sub-mesoscale topography on daytime precipitation associated with thermally driven local circulations over a mountainous region2021

    • Author(s)
      Nishizawa, S., T. Yamaura, and Y. Kajikawa
    • Organizer
      The Fifth Convection-Permitting Modeling Workshop 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Our model development activities and prospects in cloud resolving simulations2020

    • Author(s)
      Nishizawa, S.
    • Organizer
      International WS Convection-Permitting Modeling for Climate Research Current and Future Challenges
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Large-Eddy Simulations of Cumulus Congestus Cloud Using Super Droplet Method2019

    • Author(s)
      Matsushima, T., S. Nishizawa, and S. Shima
    • Organizer
      39th International Conference on Radar Meteorology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超水滴法を用いた雄大積雲のラージ・エディ・シュミレーション2019

    • Author(s)
      松嶋俊樹, 西澤誠也, 島伸一郎
    • Organizer
      日本流体力学年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 超水滴法を用いた雄大積雲のラージ・エディ・シュミレーション2019

    • Author(s)
      松嶋俊樹, 西澤誠也, 島伸一郎, W. Grabowski
    • Organizer
      日本気象学会2019年度秋季大会
    • Related Report
      2019 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi