熱圏直接観測による中規模大気重力波と電離圏プラズマバブルの発生関係の検証

• Project Area: Solar-Terrestrial Environment Prediction as Science and Social Infrastructure
• Project/Area Number: 18H04446
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Research Institution: Kyushu University
• Principal Investigator: Liu Huixin 九州大学, 理学研究院, 准教授 (70589639)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: プラズマバブル / 大気重力波 / gravity waves / plasma bubble seeding / Plasma bubble / atmosphere gravity wave

Outline of Annual Research Achievements

本研究の目的は、衛星による電離圏F層の観測と、電離圏赤道プラズマバブル（EPB）の衛星・地上観測と、高精細EPBモデルを併用して、大気重力波のEPB励起源としての役割を詳細に解明するである。研究成果として以下の３点に達成した。
１　COSMIC衛星観測により、成層圏突然昇温がプラズマバブルに与える影響を解析した。その結果、プラズマバブルの発生頻度が３割ほど減ったことが明らかになった（Yu他２０２０）。
２　地上と衛星の同時観測により、プラズブロブがプラズマバブルの成長期に形成される傾向があることを示した（Wang et al., 2019）。
３　高精細EPBモデルを用いて、大気重力波による中性風変動がプラズマバブルの生成種にメカニズムを数値シミュレーションで示した(Yokoyama et al., 2020)。
本研究の実施により、プラズマバブルの発生メカニズムと予測に繋がる点において、新学術領域「太陽地球圏環境予測」の推進に貢献できた。さらに、本研究で得られる結果を、他グループによって開発される宇宙天気予報モデルと結合することで衛星通信、全球測位システムへの電離圏擾乱の影響予測へと発展することが期待される。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] University of Geology/Institute of Geology and Geophysics(中国)
• [Journal Article] Ionospheric F Layer Scintillation Weakening as Observed by COSMIC/FORMOSAT‐3 During the Major Sudden Stratospheric Warming in January 2013 (2020)
  • Author(s): Yu Tao、Ye Hailun、Liu Huixin、Xia Chunliang、Zuo Xiaomin、Yan Xiangxiang、Yang Na、Sun Yangyi、Zhao Biqiang
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 125 Issue: 9 Pages: 1-10
  • DOI: 10.1029/2019ja027721
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Interhemispheric Transport of the Ionospheric F Region Plasma During the 2009 Sudden Stratosphere Warming (2020)
  • Author(s): Zhang Ruilong、Liu Libo、Liu Huixin、Le Huijun、Chen Yiding、Zhang Hui
  • Journal Title: Geophysical Research Letters Volume: 47 Issue: 6 Pages: 1-10
  • DOI: 10.1029/2020gl087078
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Potential for the measurement of mesosphere and lower thermosphere (MLT) wind, temperature, density and geomagnetic field with Superconducting Submillimeter-Wave Limb-Emission Sounder 2 (SMILES-2) (2020)
  • Author(s): P. Baron, S. Ochiai, E. Dupuy, R. Larsson, H. Liu, N. Manago, D. Murtagh, S. Oyama, H. Sagawa, A. Saito, T. Sakazaki, M. Shiotani, and M. Suzuki
  • Journal Title: Atmospheric Measurement Techniques Volume: 13 Issue: 1 Pages: 219-237
  • DOI: 10.5194/amt-13-219-2020
  • NAID: 120006895412
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Plasma Blobs Concurrently Observed With Bubbles in the Asian‐Oceanian Sector During Solar Maximum (2019)
  • Author(s): Wang Zheng、Liu Huixin、Shi Jiankui、Wang Guojun、Wang Xiao
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 124 Issue: 8 Pages: 7062-7071
  • DOI: 10.1029/2018ja026373
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Seeding of Equatorial Plasma Bubbles by Vertical Neutral Wind (2019)
  • Author(s): Yokoyama Tatsuhiro、Jin Hidekatsu、Shinagawa Hiroyuki、Liu Huixin
  • Journal Title: Geophysical Research Letters Volume: 46 Issue: 13 Pages: 7088-7095
  • DOI: 10.1029/2019gl083629
  • Peer Reviewed / Open Access / 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: 1-8
  • 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 mechanism (2019)
  • 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 Issue: 8 Pages: 1-10
  • DOI: 10.1016/j.asr.2018.12.042
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Observations of low-latitude travelling ionospheric disturbances by a 630.0-nm airglow imager and the CHAMP satellite over Indonesia (2019)
  • Author(s): A. C. Moral, K. Shiokawa, S. Suzuki, Huixin Liu, Y. Otsuka, C. Y. Yatini
  • Journal Title: J. Geophys. Res Volume: 124 Pages: 1-8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] El Nino Southern Oscillation effect on quasi-biennial oscillations of temperature diurnal tides in the mesosphere and lower thermosphere (2018)
  • Author(s): Sun, Y., Huixin Liu, Yasunobu Miyoshi, Libo Liu, Loren C. Chang
  • Journal Title: Earth, Planets and Space Volume: 70 Issue: 1 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 mechanism (2018)
  • Author(s): R. Shi, B. Ni, D. Summers, Huixin Liu, Y. Yoshikawa, B. Zhang
  • Journal Title: Geophysical Research Letters, Volume: 45 Pages: 1-8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Akatsuki at Venus: the first year of scientific operation (2018)
  • Author(s): M. Nakamura, D. Titov, K. McGouldrick, P. Drossart, J.L. Bertaux, Huixin Liu
  • Journal Title: Earth, Planets and Space Volume: 70 Issue: 1 Pages: 1-10
  • DOI: 10.1186/s40623-018-0916-3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] The upper atmosphere and space weather (2020)
  • Author(s): Liu Huixin
  • Organizer: JpGU2020
  • Int'l Joint Research / Invited
• [Presentation] The invisible ionosphere in the sky (2020)
  • Author(s): Huixin Liu
  • Organizer: SGEPSS
  • Invited
• [Presentation] The data policy of American geophysical union, SGEPSS annual meeting (2019)
  • Author(s): Huixin Liu
  • Organizer: SGEPSS
  • Invited
• [Presentation] Global distribution of Medium-scale gravity waves observed by GOCE (2019)
  • Author(s): Huixin Liu
  • Organizer: International Space Science Institute
• [Presentation] Numerical simulation of neutral wind seeding of equatorial plasma bubbles (2019)
  • Author(s): Huixin Liu
  • Organizer: International Space Science Institute
• [Presentation] Gravity waves and its role in seeding equatorial plasma bubbles (2019)
  • Author(s): Huixin Liu
  • Organizer: 150 km Echo (ISSI international focus workshop)
  • Int'l Joint Research
• [Presentation] ENSO effects on MLT diurnal tides: a 21-year reanalysis-driven GAIA model simulation (2019)
  • Author(s): Huixin Liu
  • Organizer: AGU Champman Conference
  • 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 sector (2019)
  • 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 simulation (2018)
  • Author(s): Huixin Liu
  • Organizer: AOGS
  • Int'l Joint Research
• [Presentation] Gravity waves and its role in seeding equatorial plasma bubbles (2018)
  • 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
• [Funded Workshop] JpGU (2020)