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2018 Fiscal Year Research-status Report

Atmospheric tidal variabilities during ENSO

Research Project

Project/Area Number 17KK0095
Research InstitutionKyushu University

Principal Investigator

Liu Huixin  九州大学, 理学研究院, 准教授 (70589639)

Project Period (FY) 2018 – 2020
Keywords大気上下結合
Outline of Annual Research Achievements

今年度は3回に渡って、アメリカ国立大気研究センター(NCAR)で国際共同研究を行なった。研究業績は以下3方面からまとめた。
1  モデル実験について。エルニーニョにおけるオゾン変化における潮汐と超高層大気ダイナミックへの影響を調べるために、NCARが開発された全大気モデルWACCM-Xの用いて、化学moduleをonにし、多数のemsemble モデル実験を行うことができた。また、成層圏突然昇温の影響と区別できるように、再解析データを使ったシミュレーションも8年間を行なった。
2  論文まとめについて。滞在期間中、大気上下結合に関して総説2本、科学論文2本をまとめることができました。総説はエルニーニョや成層圏突然昇温などに下層大気由来の超高層大気日々変動についての今の理解とこれからの研究方向を詳細に書いた (in press)。科学論文は、長年の南極でのレーダー観測を解析し、8時間潮汐の季節変動と垂直構造を明らかにし、その物理過程を考察した。
3  研究交流について。アメリカ国立大気研究センターで週一回のセミナーに参加し、ホストや他の研究者との議論を通してこの分野のアメリカで最新研究成果と研究動向を把握するに大変有意義であった。また、滞在期間中、スイス国際宇宙科学研究所で開かれた国際研究集会「150km echo」と、米国Pasadena市で開催されたChapman conference on space weather predictionに参加し、発表した。

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

以上実績書いた通り、予想以上に成果がでた。

Strategy for Future Research Activity

今後、WACCM-Xの用いた数値シミュレーションの結果を解析し、エルニーニョに伴うオゾン変化と超高層大気への影響をしらべる。

  • Research Products

    (15 results)

All 2019 2018 Other

All Journal Article (8 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 6 results) Remarks (1 results)

  • [Journal Article] Observations of low-latitude travelling ionospheric disturbances by a 630.0-nm airglow imager and the CHAMP satellite over Indonesia2019

    • Author(s)
      Moral, A. C., K. Shiokawa, S. Suzuki, Huixin Liu, Y. Otsuka, C. Y. Yatini
    • Journal Title

      J. Geophys. Res

      Volume: 124 Pages: 1-15

    • DOI

      10.1002/2018JA025634

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Vertical structure of terdiurnal tides in the Antarctic MLT region: 15-year observation over Syowa (69S, 39E)2019

    • Author(s)
      Huixin Liu, M. Tsutsumi, Hanli Liu
    • Journal Title

      Geophys. Res. Lett

      Volume: 46 Pages: 2364-2371

    • DOI

      https://doi.org/10.1002/2019GL082155

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Precursor effect of March 11 2011 off the coast of Tohoku earthquake on high and low latitude ionospheres and its possible disturbing mechanism2019

    • Author(s)
      K. Oyama, C. H. Chen, L. Bankov, D. Minakshi, K. Ryu, J.Y. Liu, Huixin Liu
    • Journal Title

      Advances in Space Research

      Volume: 12 Pages: 1-10

    • DOI

      10.1016/j.asr.2018.12.042

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 小山ひさ子氏: アマチュア天文家から 世界的な太陽観測者へ の道程2019

    • Author(s)
      Huixin Liu, H. Hayakawa, J. Isa,
    • Journal Title

      天文月報

      Volume: 112 Pages: 193-198

    • Peer Reviewed / Open Access
  • [Journal Article] El Nino Southern Oscillation effect on quasi-biennial oscillations of temperature diurnal tides in the mesosphere and lower thermosphere2018

    • Author(s)
      Sun, Y., Huixin Liu, Yasunobu Miyoshi, Libo Liu, Loren C. Chang
    • Journal Title

      Earth, Planets and Space

      Volume: 70 Pages: 1-10

    • DOI

      10.1186/s40623-018-0832-6

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Generation of electron acoustic waves in the topside ionosphere from coupling with kinetic Alfven waves: a new electron energization mechanism2018

    • Author(s)
      R. Shi, B. Ni, D. Summers, Huixin Liu, Y. Yoshikawa, B. Zhang
    • Journal Title

      Geophysical Research Letters,

      Volume: 45 Pages: 1-10

    • DOI

      10.1002/2018GL077898

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Akatsuki at Venus: the first year of scientific operation2018

    • Author(s)
      M. Nakamura, D. Titov, K. McGouldrick, P. Drossart, J.L. Bertaux, Huixin Liu
    • Journal Title

      Earth, Planets and Space

      Volume: 70 Pages: 1-10

    • DOI

      10.1186/s40623-018-0916-3

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Interannual Variability of the Daytime Equatorial Ionospheric Electric Field2018

    • Author(s)
      Y. Yamazaki, C. Stolle, J. Matzka, Huixin Liu, C. Tao
    • Journal Title

      Journal of Geophysical Research

      Volume: 123 Pages: 1-10

    • DOI

      10.1002/2017JA025165

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Plasma blobs and bubbles concurrently observed by ROCSAT-1 and ionosonde in Equatorial Ionization Anomaly region in the Asian-Oceanian sector2019

    • Author(s)
      Huixin Liu
    • Organizer
      AGU Champman Conference
    • Int'l Joint Research
  • [Presentation] ENSO effects on MLT diurnal tides: a 21-year reanalysis-driven GAIA model simulation2019

    • Author(s)
      Huixin Liu
    • Organizer
      AGU Champman Conference
    • Int'l Joint Research
  • [Presentation] Gravity waves and its role in seeding equatorial plasma bubbles2019

    • Author(s)
      Huixin Liu
    • Organizer
      150 km Echo (ISSI international focus workshop)
    • Int'l Joint Research
  • [Presentation] Medium-Scale gravity waves at the bottom side F region2018

    • Author(s)
      Huixin Liu
    • Organizer
      AGU
    • Int'l Joint Research
  • [Presentation] ENSO effects on MLT diurnal tides: a 21-year reanalysis-driven GAIA model simulation2018

    • Author(s)
      Huixin Liu
    • Organizer
      AOGS
    • Int'l Joint Research
  • [Presentation] Gravity waves and its role in seeding equatorial plasma bubbles2018

    • Author(s)
      Huixin Liu
    • Organizer
      JpGU
    • Int'l Joint Research
  • [Remarks] 研究業績

    • URL

      http://hyoka.ofc.kyushu-u.ac.jp/search/details/K004385/research.html#3387926360

URL: 

Published: 2019-12-27  

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