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Development of ensemble-based inflation schemes for convective-scale all-sky satellite radiance data assimilation

Research Project

Project/Area Number 20K22362
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0204:Astronomy, earth and planetary science, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Minamide Masashi  東京大学, 大学院工学系研究科(工学部), 助教 (90884916)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords数値予報 / データ同化 / 衛星 / 台風 / 気象
Outline of Research at the Start

台風や雷雨など極端気象現象の予測可能性の向上は、激甚化が懸念されている水災害に対応するために必需である。しかし、極端気象現象発達の基幹的なプロセスである上昇気流を伴う大気の対流は、その発達プロセスに強いカオス的性質を内包し、発生場所・時間を規定するメカニズム理解が進んでいない。極端気象現象予測可能性向上の律速段階になっている。
本研究では、申請者が世界に先駆けて開発した次世代静止軌道気象衛星観測データ同化システムを活用し、対流現象に先んじて生じるシグナルの時空間的特徴を解明、データ同化スキームを改良を実施する。これらにより、国内外の大気科学の発展、及び極端気象現象の数値予報精度改善に貢献する。

Outline of Final Research Achievements

Atmospheric deep moist convection has emerged as one of the most challenging topics for numerical weather prediction, due to the chaotic process of development with multi-scale physical interactions. This study examines the dynamics and predictability of the development of convection and the subsequent development of severe weather events like tropical cyclones. We have found essential sources of predictive convective events, and achieved the improvement of tropical cyclone intensity prediction accuracy.

Academic Significance and Societal Importance of the Research Achievements

気象において台風のような極端気象現象の発生は、基幹プロセスである積雲対流のカオス性が強く、予測は困難という認識が共有されてきた。しかしながら、近年の技術発展により、個々の積雲対流の発達を解像できる観測網や、シミュレーションで表現可能な数値予報モデル、それらを活用し得る計算機が整備され、そのような前提に風穴を開ける基盤が準備されつつある。本研究は、衛星観測データの新たな利用法と、その効果を定量的に示すものであり、開発した研究ベースの予測技術が、現業機関への実装を通じて社会(日々の天気予報)に貢献するにあたって不可欠な知見を提供した。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Journal Article] Using Ensemble Data Assimilation to Explore the Environmental Controls on the Initiation and Predictability of Moist Convection2022

    • Author(s)
      Minamide Masashi、Posselt Derek J.
    • Journal Title

      Journal of the Atmospheric Sciences

      Volume: 79 Issue: 4 Pages: 1151-1169

    • DOI

      10.1175/jas-d-21-0140.1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Predictability of moist convection through thousands ensemble convective-scale data assimilation2022

    • Author(s)
      Minamide M., D. J. Posselt
    • Organizer
      the 102nd Annual Meeting of American Meteorological Society
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pursuing the promise of satellite all-sky radiance assimilation for improving hurricane prediction: A recent adventure of Fuqing Zhang2022

    • Author(s)
      Minamide M., D. J. Posselt
    • Organizer
      The 35th Conference on Hurricanes and Tropical Meteorology
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 大アンサンブルによる全天赤外輝度温度同化を通じた対流の予測可能性2022

    • Author(s)
      Minamide, M., D. J. Posselt
    • Organizer
      気象学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Nonlinear Forecast Error Growth of Rapidly Intensifying Hurricane Harvey (2017) Examined through Convection-permitting Ensemble Assimilation of GOES-16 All-sky Radiances2021

    • Author(s)
      Minamide M., F.Zhang, E. E. Clothiaux
    • Organizer
      the 101st Annual Meeting of American Meteorological Society
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hurricane-Seasonal analysis on the performances of Convection-Permitting Ensemble Tropical Cyclone Initializations with All-sky Satellite Radiance Assimilation2021

    • Author(s)
      Minamide M., D. J. Posselt
    • Organizer
      the 101st Annual Meeting of American Meteorological Society
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 全天赤外輝度温度のデータ同化による極端気象現象予測2021

    • Author(s)
      Minamide, M., D. J. Posselt
    • Organizer
      気象学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 全天赤外輝度温度のデータ同化による台風の急速発達予測2021

    • Author(s)
      Minamide, M., D. J. Posselt
    • Organizer
      気象学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Capability of Highly Spatiotemporally Resolving Initializations with All-sky Satellite Data Assimilation on the Convective Severe Weather Event Predictions2021

    • Author(s)
      Masashi Minamide
    • Organizer
      34th Conference on Hurricanes and Tropical Meteorology Virtual Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 全天赤外輝度温度同化を通じた対流の予測可能性2020

    • Author(s)
      南出将志
    • Organizer
      日本気象学会2020秋季大会
    • Related Report
      2020 Research-status Report

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Published: 2020-09-29   Modified: 2023-01-30  

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