ENSO気候変動は超高層大気をどう揺らすのか：成層圏オゾンが果たす役割の解明

• Project/Area Number: 18H01270
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: Kyushu University
• Principal Investigator: Liu Huixin 九州大学, 理学研究院, 准教授 (70589639)
• Co-Investigator(Kenkyū-buntansha): 山本 衛 京都大学, 生存圏研究所, 教授 (20210560) ; 江口 菜穂 九州大学, 応用力学研究所, 助教 (50378907) ; 陣 英克 国立研究開発法人情報通信研究機構, 電磁波研究所電磁波伝搬研究センター, 主任研究員 (60466240) ; 廣岡 俊彦 九州大学, 理学研究院, 教授 (90253393)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Granted (Fiscal Year 2021)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
• Keywords: 大気圏・電離圏結合 / vertical coupling / ENSO / エルニーニョ / 大気上下結合 / 大気潮汐波 / atmosphere coupling

Outline of Annual Research Achievements

本研究では、地面から数百km上空までの大気圏・電離圏結合のメカニズムへの理解を目指し、さまざまな気象現象が超高層大気へ及ぼす影響を観測と数値シミュレーションを用いて解明している。今年度は対流圏温暖化を引き起こした二酸化炭素の上昇を考慮した大気圏・電離圏結合の変動を大気モデルを用いて数値実験を行いた。主に、二酸化炭素を340ppmvから2倍になる時、熱圏・電離圏がどのように変化するかを調べた。その結果、熱圏は寒冷化されるとともに、大気循環も強まるというダイナミックの変化が明らかになった。これにより、電離圏密度分布が変わり、エルニーニョなどの気象現象に対する反応も変調される。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

計画した数値シミュレーションは順調に行うことができ、論文も発表した。

Strategy for Future Research Activity

今後観測とさらに比較し、モデルと観測のずれを理解する。

Research Products

• [Journal Article] Space Weather as the Nexus of Applied and Fundamental Space Science: The Need for Separate Funding Mechanisms and Definition (2021)
  • Author(s): Space Weather Editors
  • Journal Title: Space Weather Volume: 19
  • DOI: 10.1029/2020sw002695
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Characteristics of Summer Descending Sporadic E Layer Observed With the Ionosondes in the China Region (2021)
  • Author(s): Qiu Lihui、Zuo Xiaomin、Yu Tao、Sun Yangyi、Liu Huixin、Sun Lingfeng、Zhao Biqiang
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126
  • DOI: 10.1029/2020ja028729
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Gravity Wave Weakening During the 2019 Antarctic Stratospheric Sudden Warming (2021)
  • Author(s): Kogure Masaru、Yue Jia、Liu Huixin
  • Journal Title: Geophysical Research Letters Volume: 48
  • DOI: 10.1029/2021gl092537
  • 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 Pages: 219-237
  • DOI: 10.5194/amt-13-219-2020
  • NAID: 120006895412
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] First Global‐Scale Synoptic Imaging of Solar Eclipse Effects in the Thermosphere (2020)
  • Author(s): Aryal Saurav、Evans J. S.、Correira John、Burns Alan G.、Wang Wenbin、Solomon Stanley C.、Laskar Fazlul I.、McClintock William E.、Eastes Richard W.、Dang Tong、Lei Jiuhou、Liu Huixin、Jee Geonhwa
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 125
  • DOI: 10.1029/2020ja027789
  • Peer Reviewed / 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 Pages: 1-10
  • DOI: 10.1029/2020gl087078
  • Peer Reviewed / Open Access / Int'l Joint Research
• [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 Pages: 1-10
  • DOI: 10.1029/2019ja027721
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Circulation and Tides in a Cooler Upper Atmosphere: Dynamical Effects of CO 2 Doubling (2020)
  • Author(s): Liu Huixin、Tao Chihiro、Jin Hidekatsu、Nakamoto Yusuke
  • Journal Title: Geophysical Research Letters Volume: 47
  • DOI: 10.1029/2020gl087413
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Dipolar elementary current systems for ionospheric current reconstruction at low and middle latitudes (2020)
  • Author(s): Vanham?ki Heikki、Maute Astrid、Alken Patrick、Liu Huixin
  • Journal Title: Earth, Planets and Space Volume: 72 Pages: 1-15
  • DOI: 10.1186/s40623-020-01284-1
  • 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 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: 1-16
  • 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: Progress in Earth and Planetary Science 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 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: Progress in Earth and Planetary Science 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 Field (2018)
  • Author(s): Y. Yamazaki, C. Stolle, J. Matzka, Huixin Liu, C. Tao
  • Journal Title: Journal of Geophysical Research Volume: 123 Pages: 1-10
• [Presentation] The atmosphere-ionosphere coupling and space weather (2021)
  • Author(s): Huixin Liu
  • Organizer: German DFG Priority Program symposium
  • Int'l Joint Research / Invited
• [Presentation] Gravity wave weakening during the 2019 Antarctic stratospheric sudden warming (2021)
  • Author(s): M. Kogure, Huixin Liu
  • Organizer: Japan Geophysical Union
  • Int'l Joint Research / Invited
• [Presentation] How does long-term changes in geomagnetic activity regulate the CO2-driven trend in the thermosphere and ionosphere? (2021)
  • Author(s): Huixin Liu
  • Organizer: IAGA-IAMAS joint meeting
  • Int'l Joint Research / Invited
• [Presentation] Geomagnetic activity effects on CO2-driven trend in the ionosphere: GAIA experiments (2021)
  • Author(s): Huixin Liu
  • Organizer: European Geophysical Union
  • Int'l Joint Research / Invited
• [Presentation] Circulation and tides in a cooler upper atmosphere: dynamical effects of CO2 doubling (2021)
  • Author(s): Huixin Liu
  • Organizer: COSPAR
  • Int'l Joint Research / Invited
• [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] 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] Medium-Scale gravity waves at the bottom side F region (2018)
  • Author(s): Huixin Liu
  • Organizer: AGU
  • 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
• [Remarks] 研究業績
  • URL: http://hyoka.ofc.kyushu-u.ac.jp/search/details/K004385/research.html#3387926360