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Development of a novel numerical model for cloud microphysics resolving cloud simulations

Research Project

Project/Area Number 20K14559
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research InstitutionKobe University (2022-2023)
Institute of Physical and Chemical Research (2020-2021)

Principal Investigator

Matsushima Toshiki  神戸大学, 理学研究科, 特命助教 (00803553)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords雲微物理 / 乱流 / ラージ・エディ・シミュレーション / 超水滴法 / 雲物理 / 最適輸送理論 / 高性能計算 / 粒径分布 / 数値モデル
Outline of Research at the Start

雲粒の凝結過程とその乱流影響をほぼ解像するような超高解像度の数値実験が可能な数値モデルを構築する.特に数値モデルの根幹である,力学過程や雲微物理過程において,現実を良く近似する精緻な方法でありながら, 計算機でより高速・高効率となるようアルゴリズムの開発・最適化を行い,その有効性を従来モデルと比較し実証する.開発した数値モデルを用いて実際に大規模な数値実験を行い,低解像度の数値モデルを用いて得られる結果との差を調べる.

Outline of Final Research Achievements

We developed a particle-based cloud model for meter- to submeter-scale-resolution simulations of warm clouds. The time-to-solution of the developed model is shorter than that with a bin method and even comparable to that with a bulk method. In addition to high-level optimizations on the supercomputer 'Fugaku', our model incorporates a novel sampling method using optimal transport to estimate a parameter that controls the interaction between microphysics and turbulence, and a more accurate particle advection scheme to improve the spatial uniformity of the super-droplet number density. Finally, we demonstrated that our model supports numerical experiments with 2 m resolution, which may fill the gap between direct numerical simulations and large-eddy simulations.

Academic Significance and Societal Importance of the Research Achievements

本研究課題により、直接数値実験とラージ・エディ・シミュレーションのスケールギャップを繋ぐ数値モデルを開発できた。従来不可能であった精度の数値シミュレーションが可能となることで、今後、微細スケールから気象・気候スケールまでの広いダイナミックレンジにおける、雲と乱流の相互作用の理解に繋がることが期待される。

Report

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

    (9 results)

All 2024 2023 2022 2021 2020 Other

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 2 results) Remarks (2 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
      2023 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 Research-status Report
    • Open Access / Int'l Joint Research
  • [Presentation] 超水滴法による革新的な雲のシミュレーション:メートルからサブ メートルスケール解像度の実現および、全球領域への応用に向けて2024

    • Author(s)
      松嶋俊樹
    • Organizer
      第3回「富岳」成果創出加速プログラム研究交流会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Numerical model to enable ultra-high-resolution simulations of shallow clouds using the super-droplet method2023

    • Author(s)
      Toshiki Matsushima
    • Organizer
      103rd AMS Annual Meeting
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 超水滴法による浅い雲の超高解像度数値実験を可能にする 数値モデルの開発2022

    • Author(s)
      松嶋俊樹
    • Organizer
      気象学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Numerical model to enable ultra-high-resolution simulations of shallow clouds using the super-droplet method2022

    • Author(s)
      Toshiki Matsushima
    • Organizer
      AGU Fall Meeting
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] VRを用いた気象・気候シミュレーション空間の可視化2020

    • Author(s)
      松嶋俊樹,末木健太
    • Organizer
      日本気象学会春季大会
    • Related Report
      2020 Research-status Report
  • [Remarks] 微速度撮影された雲の様子を観察してみよう:「京」コンピュータを使ったシミュレーション編1

    • URL

      https://www.youtube.com/watch?v=7-XXqI1Jtcw

    • Related Report
      2020 Research-status Report
  • [Remarks] 微速度撮影された雲の様子を観察してみよう:「京」コンピュータを使ったシミュレーション編2

    • URL

      https://www.youtube.com/watch?v=dxoIdczz-gc

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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