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Response of thermospheric nocturnal winds according to the Solar flares

Research Project

Project/Area Number 15K05299
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionHirosaki University (2016-2018)
Research Institute for Humanity and Nature (2015)

Principal Investigator

Yatagai Akiyo  弘前大学, 理工学研究科, 教授 (60353447)

Research Collaborator Oyama Shin-ichiro  
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords熱圏風 / フレア / 気候 / FPI / 極端紫外線 / 太陽フレア / 中性風 / FPI / 熱圏 / 太陽活動
Outline of Final Research Achievements

This study showed the horizontal structure of climatology of thermospheric nocturnal winds at a height of approximately 250 km in the Asia Oceania region for the first time using observations made with Fabry Perot interferometers (FPIs). The observation data underwent quality control that involved consideration of cloud information, wind speed value, and standard deviation of results obtained from synchronous fringe images; approximately 30 % of the observation data from all the four stations were deemed suitable for use. Although there were fewer samples for the three stations outside Japan in the rainy season compared to that for that of Japan (Shigaraki), the seasonal climatology reported here can be used to provide a background long-term average status for describing anomalous events and extremes having different causes.

Academic Significance and Societal Importance of the Research Achievements

本研究では、アジア・オセアニア域について、熱圏水平風の空間分布を初めて示した。中国や南北アメリカの観測とも比較可能であり、本研究成果は、太陽フレアのみならずCMEやさまざまなイベントの基礎データ、モデルの検証データとして利用できる。また、フレア応答時間も既存の成果と整合的であり、今後太陽~地球大気の変動系についての学際的研究の基礎データになる。地球温暖化に関連する社会適応意識が高まるに伴い、時系列比較のみによる関係性解析研究が増えつつある。本研究のように丁寧にデータの品質管理を行い、物理的仮定を踏まえた研究は、地味ではあるが疑似科学と一線を画す社会的にも貴重な成果といえる。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (13 results)

All 2019 2018 2017 2016 2015

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Thermospheric Nocturnal Wind Climatology Observed by Fabry-Perot Interferometers over the Asia-Oceania Region2016

    • Author(s)
      Akiyo YATAGAI and Shin-ichiro OYAMA
    • Journal Title

      Journal of the Meteorological Society of Japan. Ser. II

      Volume: 94 Issue: 6 Pages: 525-536

    • DOI

      10.2151/jmsj.2016-026

    • NAID

      130005286355

    • ISSN
      0026-1165, 2186-9057
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Thermospheric Nocturnal Wind Climatology Observed by Fabry-Perot Interferometers over the Asia-Oceania Region2016

    • Author(s)
      Akiyo YATAGAI and Shin-ichiro OYAMA
    • Journal Title

      Journal of Meteorological Society of Japan

      Volume: 未定

    • NAID

      130005286355

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Thermospheric Nocturnal Wind Climatology Observed by Fabry-Perot Interferometers over the Asia-Oceania Region2018

    • Author(s)
      Yatagai, A. and S. Oyama
    • Organizer
      American Geophysical Union
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] pplication of the high-resolution APHRODITE precipitation product to rainfall-triggered fatal landslide occurrence in Nepal2017

    • Author(s)
      Yatagai, A., D. Petley, M. Froude, R. Suzuki, C. Ando, M. Chigira
    • Organizer
      Japan Geoscience Union (JpGU)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Asian Precipitation - Highly Resolved Observational Data Integration Towards Evaluation of Extreme Events -- Targets and Initial Products --2017

    • Author(s)
      Yatagai, A., M. Masuda, K. Kamiguchi, K. Tanaka, A. Higuchi, K.Toyoshima
    • Organizer
      Asia Oceania Geoscience Society (AOGS)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of Precise Precipitation Data for Assessing the Potential Impacts of Climate Change for Middle East and Africa2017

    • Author(s)
      Yatagai, A., V. Kumar, T. N. Krishnamurti
    • Organizer
      IAMAS/IAPSO/IAGA
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] APHRODITE-2: Asian Precipitation -- Highly Resolved Observational Data Integration Towards Evaluation of Extreme Events2017

    • Author(s)
      Yatagai, A.
    • Organizer
      IAMAS/IAPSO/IAGA
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] ファブリ・ペロー干渉計により観測されたアジア・オセアニア地域の夜間熱圏風の気候場2016

    • Author(s)
      谷田貝 亜紀代 ・大山 伸一郎
    • Organizer
      第140回 地球電磁気・地球惑星圏学会
    • Place of Presentation
      九州大学伊都キャンパス(福岡市)
    • Year and Date
      2016-11-19
    • Related Report
      2016 Research-status Report
  • [Presentation] Dependency of the thermospheric dynamics on the auroral morphology2016

    • Author(s)
      Oyama, S., Hirahara, M., Shiokawa, K. and Yatagai, A.
    • Organizer
      International Symposium on Recent Observations and Simulations of the Sun-Earth System (ISROSES III)
    • Place of Presentation
      Golden Sands, Bulgaria
    • Year and Date
      2016-09-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ファブリ・ペロー干渉計により観測されたアジア・オセアニア地域の夜間熱圏風の気候場2016

    • Author(s)
      谷田貝 亜紀代・大山 伸一郎
    • Organizer
      日本気象学会2016年春季大会
    • Place of Presentation
      国立オリンピック記念青少年総合センター(東京)
    • Year and Date
      2016-05-18
    • Related Report
      2016 Research-status Report
  • [Presentation] ファブリ・ペロー干渉計により観測されたアジア・ オセアニア地域の夜間熱圏風の気候場2016

    • Author(s)
      谷田貝 亜紀代・大山 伸一郎
    • Organizer
      日本気象学会2016年春季大会
    • Place of Presentation
      国立オリンピック記念青少年総合センター
    • Year and Date
      2016-05-18
    • Related Report
      2015 Research-status Report
  • [Presentation] 超高層大気循環場への太陽フレア応答:ファブリ・ペロー干渉計から見た熱圏風への影響2015

    • Author(s)
      谷田貝 亜紀代・大山 伸一郎・塩川 和夫
    • Organizer
      日本気象学会2015年春季大会
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2015-05-21
    • Related Report
      2015 Research-status Report
  • [Book] Climate Change Impacts on Basin Agro-ecosystem2019

    • Author(s)
      Yatagai, A., V. Kumar and T. N. Krishnamurti (in T. Watanabe and M. Aydin eds.)
    • Total Pages
      412
    • Publisher
      Springer
    • ISBN
      9783030010362
    • Related Report
      2018 Annual Research Report

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Published: 2015-04-16   Modified: 2020-03-30  

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