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Remort impacts of convection activity over the Tibetan Plateau on summer extreme weather condition in Japan

Research Project

Project/Area Number 20K04095
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17030:Human geosciences-related
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

Sugimoto Shiori  国立研究開発法人海洋研究開発機構, 地球環境部門(環境変動予測研究センター), 研究員 (90632076)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords夏季天候 / 東アジア / 領域大気モデル / チベット高原 / 大気領域モデル / 高解像数値実験 / 積雲対流 / 夏季気象災害
Outline of Research at the Start

「日本から遠く離れたチベット高原上で発達する積雲は、どのように・どの程度、日本の豪雨や猛暑と関連しているのだろうか?」
この問いに答えるべく、高分解能の大気数値シミュレーションを用い、チベット高原上の積雲対流が日本の夏季天候に及ぼす遠隔作用について明らかにする。そして、日本の夏季気象災害の予測向上とって高原上の雲・降水過程に対する正しい理解が重要であることを提示する。

Outline of Final Research Achievements

Numerical experiments with 20-km horizontal resolution (Ctl) were conducted over Asia from April to September for 25 years, and preciptiation bias in June was analyzed. Simulation accuarcy in precipitation was controled by a drier and colder bias associated with a weakning of the western North Pacific high and a higher bias of the geopotential height in the upper troposphere. A sensitivity experiment (Sen), which have an inner domain with 4-km horizontal resolution over the Tibetan Plateau in the Ctl, was also conducted focusing on the hot summer in 2010. In the Sen, the bias of geopotential height at 200 hPa was small relative to that in the Ctl because the stronger convection over the Tibetan Plateau excites a wave train. Furthermore, simulated geopotential height at 850 hPa in the Sen is also closer to the reanalysis over Japan. Due to higher pressure conditions in the upper and lower troposphere, a cold bias over Japan in the Ctl was ameliorated approximately 20-50% in the Sen.

Academic Significance and Societal Importance of the Research Achievements

数値シミュレーションにて夏季降水の再現精度を向上させるためには、水蒸気輸送量を左右する太平洋高気圧の発達と中緯度上下層で連動する循環場を適切に再現する必要があることが分かった。また、猛暑形成に着目した場合、チベット高原の雲活動を起点とした中緯度循環場の遠隔作用が日本の気温再現に重要な役割を果たすことが示唆された。これらの学術的成果は、太平洋上だけでなくチベット高原上での対流活動を適切に再現することで、日本の夏季天候予測の再現性が向上する可能性を示す。また、一部の数値実験データを国際プロジェクトに提供し学術的に貢献した。

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

    (12 results)

All 2023 2022 2021 Other

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

  • [Int'l Joint Research] University of California, Los Angeles(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of California, Los Angeles(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of California, Los Angeles(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of California, Los Angeles(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Regional climate model intercomparison over the Tibetan Plateau in the GEWEX/LS4P Phase I2023

    • Author(s)
      Tang Jianping、Xue Yongkang、Long Mengyuan、Ma Mengnan、Liang Xin-Zhong、Sugimoto Shiori、Yang Kun、Ji Zhenming、Hong Jinkyu、Kim Jeongwon、Xu Haoran、Zhou Xu、Sato Tomonori、Takahashi Hiroshi G.、Wang Shuyu、Wang Guiling、Chou Sin Chan、Guo Weidong、Yu Miao、Pan Xiaoduo
    • Journal Title

      Climate Dynamics

      Volume: 62 Issue: 4 Pages: 2837-2858

    • DOI

      10.1007/s00382-023-06992-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Influence of convective processes on weather research and forecasting model precipitation biases over East Asia2022

    • Author(s)
      Sugimoto Shiori、Xue Yongkang、Sato Tomonori、Takahashi Hiroshi G.
    • Journal Title

      Climate Dynamics

      Volume: - Issue: 4 Pages: 2859-2875

    • DOI

      10.1007/s00382-022-06587-5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] アジア山岳域を対象とした高解像度モデリング研究の最新動向2023

    • Author(s)
      杉本志織
    • Organizer
      気象学会2023年度春季大会シンポジウム 「夏季アジアモンスーン研究の多面的展開」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 水平20km格子実験で再現された東アジア陸域における6月の降水バイアスの要因2022

    • Author(s)
      杉本志織、Xue Yongkang、佐藤友徳、高橋洋
    • Organizer
      日本気象学会2022年度秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Heavy precipitation over southwestern Japan during the Baiu Season due to abundant moisture transport from synoptic-scale atmospheric conditions2021

    • Author(s)
      Shiori Sugimoto
    • Organizer
      Asia Oceania Geosciences Society (AOGS) VIRTUAL 18th annual meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Remarks] JAMSTEC研究者総覧

    • URL

      https://www.jamstec.go.jp/souran/html/Shiori_Sugimoto_99d16-j.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] JAMSTEC研究者総覧

    • URL

      http://www.jamstec.go.jp/souran/html/Shiori_Sugimoto_99d16-j.html

    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Remarks]

    • URL

      http://www.jamstec.go.jp/souran/html/Shiori_Sugimoto_99d16-j.html

    • Related Report
      2020 Research-status Report

URL: 

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

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