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Development of a cloud-resolving model based on the building cube method

Research Project

Project/Area Number 16K13881
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionKyoto University

Principal Investigator

Shige Shoichi  京都大学, 理学研究科, 准教授 (60344264)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords雲解像モデル / 直交格子積み上げ法 / 雲解像度モデル / 気象学 / 計算物理 / 大気現象 / 自然現象観測・予測
Outline of Final Research Achievements

We developed a cloud-resolving model to simulate tropical precipitation systems efficiently based on the building cube method, which divided the computational region into cubes that can have different resolution. In our cloud-resolving model, the high resolution cube represents the lower layer where the eddy scale is small, and the low resolution cube represents the higher layer where the eddy scale is large. This representation based on the building cube method leads to decreasing the number of cells and simulating the development of convection efficiently. A warm bubble test and a 2D squall line test showed that our cloud-resolving model succeeded in decreasing the computational cost by decreasing the number of cells with the building cube method, and can simulate development of convection efficiently by locally increasing the resolution in the lower layer.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した直交格子積み上げ法を採用した雲解像モデルは水平解像度を鉛直方向に一定・不変とする従来の大気モデルとは大きく異なり、雲の発達の再現に重要な下層の解像度を局所的に高めることを可能にする。特に3次元実験では2次元実験に比べて計算コストが大幅に増加するため、本研究で開発した雲解像モデルを3次元化することで計算コストの改善はより効果的となると考えられる。計算コストを抑えつつ下層の解像度を高めた実験が可能となるためより広い領域を対象とした実験を可能にし、次世代の全球雲解像モデル開発の起点となり、雲解像モデルを用いた様々な降水システムの特性解明や予報に寄与する。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results)

  • [Int'l Joint Research] Imperial College London(英国)

    • Related Report
      2016 Research-status Report
  • [Presentation] 重合格子法における単調性及び保存性を持つ補間法の開発2019

    • Author(s)
      武村一史・重尚一
    • Organizer
      日本気象学会2019年度春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of a non-hydrostatic atmospheric model using the Chimera grid method for a steep terrain2018

    • Author(s)
      Kazushi Takemura
    • Organizer
      Workshop on Moving and Adaptive Meshes for Global Atmospheric Modelling
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 重合格子法を用いた非静力学モデルへの保存性補間法の実装2017

    • Author(s)
      武村 一史、重 尚一
    • Organizer
      日本気象学会2017年度春季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Development of a non-hydrostatic atmospheric model using the Chimera grid method for a steep terrain2016

    • Author(s)
      Kazushi Takemura, Keiichi Ishioka, Shoichi Shige
    • Organizer
      the 4th International Workshop on Nonhydrostatic Models
    • Place of Presentation
      Hakone
    • Year and Date
      2016-11-30
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of a non-hydrostatic atmospheric model using the Chimera grid method for a steep terrain2016

    • Author(s)
      Kazushi Takemura, Keiichi Ishioka, Shoichi Shige
    • Organizer
      The 5th KU-NTU Atmospheric Science Students/Young Scientists Exchange Program in 2016
    • Place of Presentation
      Kyoto
    • Year and Date
      2016-11-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 重合格子法により地形表現を行う大気モデルへの保存性補間法の導入2016

    • Author(s)
      武村一史、重尚一
    • Organizer
      日本流体力学年会2016
    • Place of Presentation
      名古屋
    • Year and Date
      2016-09-26
    • Related Report
      2016 Research-status Report
  • [Presentation] Development of a non-hydrostatic atmospheric model using the Chimera grid method for a steep terrain2016

    • Author(s)
      Kazushi Takemura, Keiichi Ishioka, Shoichi Shige
    • Organizer
      Dynamical Core Model Intercomparison Project Workshop 2016
    • Place of Presentation
      Colorado
    • Year and Date
      2016-06-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 重合格子法における補間法による保存性の検証2016

    • Author(s)
      武村一史、重尚一
    • Organizer
      日本気象学会2016年春季大会
    • Place of Presentation
      東京
    • Year and Date
      2016-05-18
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2022-02-21  

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