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Development of a fast 3D spectral atmospheric general circulation model and new approaches to atmospheric dynamics research

Research Project

Project/Area Number 20K04061
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research InstitutionKyoto University

Principal Investigator

Ishioka Keiichi  京都大学, 理学研究科, 教授 (90292804)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords3次元スペクトル大気大循環モデル / 成層圏準2年周期振動 / Pekerisモード / 線形固有値解析 / 次元スペクトル大気大循環モデル / 鉛直解像度 / 傾圧トイモデル / 傾圧渦 / βドリフト / 不安定周期軌道 / 傾圧擾乱 / 大規模大気乱流
Outline of Research at the Start

3次元スペクトルメカニステック大気大循環モデル(MCM)を構築し, 高速動作するようにして公開する. それを用いて, 以下の二つの研究を行う.
1. 中緯度傾圧擾乱のライフサイクルに対して, 不安定周期軌道を求める解析を行う.
2. MCMで計算される大気の大規模乱流の統計的性質に対する鉛直解像度および鉛直方向の離散化手法の影響を調べ, 大気の大規模乱流の形成メカニズムを明らかにする.

Outline of Final Research Achievements

We have succeeded in constructing a three-dimensional spectral-mechanistic atmospheric general circulation model (MCM), and the paper in which we presented our results has been highly evaluated in the scientific community, including a paper award. As a result of a new approach to the study of atmospheric dynamics using the MCM, we investigated whether or not QBO (Quasi-Biennial Oscillation)-like oscillations occur in the benchmark experimental setup of a previous study and, by comparison with the finite-difference method model, showed that whether or not QBO-like oscillations occur depends largely on the vertical discretization method and resolution. The results showed that whether or not QBO-like oscillations occur depends strongly on the vertical discretization method and resolution. As a corollary study, we also proposed a method to accurately give the equivalent depth of the Pekeris mode detected in the 2022 Tonga eruption.

Academic Significance and Societal Importance of the Research Achievements

本研究で構築された3次元スペクトルスペクトルメカニステック大気大循環モデルは, 鉛直方向に差分法を用いる従来のモデルに比べて精度的に優れているため, 将来的に天気予報モデルにこの手法が応用される可能性もあり, それが実現すれば社会的意義は大きい. また, この定式化は数学的に簡明であり, この定式化を用いた線形固有値解析などが比較的容易であるため, 大気力学研究に新たなアプローチを可能にするという意味で, 学術的意義も高い.

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

    (15 results)

All 2023 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] What is the Equivalent Depth of the Pekeris Mode?2023

    • Author(s)
      ISHIOKA Keiichi
    • Journal Title

      Journal of the Meteorological Society of Japan. Ser. II

      Volume: 101 Issue: 2 Pages: 139-148

    • DOI

      10.2151/jmsj.2023-008

    • ISSN
      0026-1165, 2186-9057
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of the Equivalent Depth of the Pekeris Mode Using Reanalysis Data2023

    • Author(s)
      ISHIZAKI Hideaki、SAKAZAKI Takatoshi、ISHIOKA Keiichi
    • Journal Title

      Journal of the Meteorological Society of Japan. Ser. II

      Volume: 101 Issue: 6 Pages: 461-469

    • DOI

      10.2151/jmsj.2023-027

    • ISSN
      0026-1165, 2186-9057
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A Formulation of a Three-Dimensional Spectral Model for the Primitive Equations2022

    • Author(s)
      ISHIOKA Keiichi、YAMAMOTO Naoto、FUJITA Masato
    • Journal Title

      Journal of the Meteorological Society of Japan. Ser. II

      Volume: 100 Issue: 2 Pages: 445-469

    • DOI

      10.2151/jmsj.2022-022

    • NAID

      130008136463

    • ISSN
      0026-1165, 2186-9057
    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] New numerical methods for calculating statistical equilibria of two-dimensional turbulent flows, strictly based on the Miller-Robert-Sommeria theory2022

    • Author(s)
      Ryono K、Ishioka K
    • Journal Title

      Fluid Dynamics Research

      Volume: 54 Issue: 5 Pages: 055505-055505

    • DOI

      10.1088/1873-7005/ac9713

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 乾燥大気大循環モデルはQBO的振動を生みだすか?2023

    • Author(s)
      藤田駿・石岡圭一
    • Organizer
      日本流体力学会年会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 再解析データを用いたPekerisモードの等価深度の推定2023

    • Author(s)
      石崎秀晃・坂崎貴俊・石岡圭一
    • Organizer
      日本流体力学会年会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 乾燥大気大循環モデルは準二年周期振動を生みだすか?2023

    • Author(s)
      藤田駿・石岡圭一
    • Organizer
      日本気象学会2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 再解析データを用いたPekerisモードの等価深度の推定2023

    • Author(s)
      石崎秀晃・坂崎貴俊・石岡圭一
    • Organizer
      日本気象学会2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] メカニスティック大気大循環モデルにおける不安定周期軌道の探索2022

    • Author(s)
      今井稀温・石岡圭一
    • Organizer
      日本気象学会秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] What is the equivalent depth of the Pekeris mode?2022

    • Author(s)
      Keiichi Ishioka
    • Organizer
      NTU-KU Joint Workshop on Severe Weather and Climate Impacts in East Asia
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical methods for calculating statistical equilibria of two-dimensional turbulence considering all Casimir invariants2022

    • Author(s)
      Koki Ryono and Keiichi Ishioka
    • Organizer
      6th Asia-Pacific Conference on Plasma Physics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 回転球面上の2次元乱流に対する統計力学的平衡状態の数値計算2022

    • Author(s)
      漁野光紀・石岡圭一
    • Organizer
      日本流体力学会年会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 2次元乱流の統計的平衡状態を数値計算するための新しい手法2022

    • Author(s)
      漁野光紀・石岡圭一
    • Organizer
      Japan Geoscience Union Meeting 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 球面調和関数変換ライブラリの高速化について2021

    • Author(s)
      石岡圭一
    • Organizer
      CPSセミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] 回転球面上における傾圧渦の移動について2020

    • Author(s)
      鈴木裕太・石岡圭一
    • Organizer
      日本気象学会2020年度秋季大会
    • Related Report
      2020 Research-status Report

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

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