Coupling between neutral atmosphere and plasma

• Project/Area Number: 15K05303
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Hokkaido Information University
• Principal Investigator: Watanabe Shigeto 北海道情報大学, 経営情報学部, 教授 (90271577)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 地球惑星大気プラズマ / 電離圏 / 熱圏 / プラズマ圏 / 大気プラズマモデリング / 大気プラズマ結合 / 磁気圏 / 電磁流体力学方程式 / 人工知能 / 地球惑星大気 / 地球惑星電離圏 / プラズマ / ロケット実験 / 大気 / 熱圏下部 / 電離層 / サウンディングロケット

Outline of Final Research Achievements

A new discovery of atmospheric plasma coupling process obtained by sounding rocket experiments is a high speed wind flow of neutral atmosphere of ~ 100 m/s around 100 km altitude. The high-speed wind occurs in the dynamo region from 90 km to 130 km. The winds include small scale wind fluctuations. We believe that we directly observed atmospheric gravity waves existing around 100 km altitude.
Based on the findings and knowledge, we have developed the Earth and planetary atmosphere-plasma models. The atmospheric plasma model was constructed as a physical model using magneto hydrodynamic equation, empirical model, and artificial intelligence (AI) model.

Research Products

• [Journal Article] Venus looks different from day to night across wavelengths: morphology from Akatsuki multispectral images (2018)
  • Author(s): Sanjay S. Limaye, Shigeto Watanabe, Atsushi Yamazaki, Manabu Yamada, Takehiko Satoh, Masato Nakamura, Makoto Taguchi, Tetsuya Fukuhara, Takeshi Imamura, Toru Kouyama, Yeon Joo Lee, Takeshi Horinouchi, Javier Peralta, Naomoto Iwagami, George L. Hashimoto, Seiko Takagi, Shoko Ohtsuki, Shin-ya Murakami et al.
  • Journal Title: Earth, Planets and Space Volume: 70 Issue: 1 Pages: 1-38
  • DOI: 10.1186/s40623-018-0789-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction (2017)
  • Author(s): Ogohara, K., M. Takagi, et al.
  • Journal Title: Earth, Planets and Space Volume: 69 Issue: 1 Pages: 1-16
  • DOI: 10.1186/s40623-017-0749-5
  • NAID: 120006486825
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Equatorial jet in the lower to middle cloud layer of Venus revealed by Akatsuki (2017)
  • Author(s): Horinouchi Takeshi、Murakami Shin-ya、Satoh Takehiko、Peralta Javier、Ogohara Kazunori、Kouyama Toru、Imamura Takeshi、Kashimura Hiroki、Limaye Sanjay S.、McGouldrick Kevin、Nakamura Masato、Sato Takao M.、Sugiyama Ko-ichiro、Takagi Masahiro、Watanabe Shigeto、Yamada Manabu、Yamazaki Atsushi、Young Eliot F.
  • Journal Title: Nature Geoscience Volume: 10 Issue: 9 Pages: 646-651
  • DOI: 10.1038/ngeo3016
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Large stationary gravity wave in the atmosphere of Venus (2017)
  • Author(s): Fukuhara, T., M. Futaguchi, G. L. Hashimoto, T. Horinouchi, T. Imamura, N. Iwagaimi, T. Kouyama, S. Murakami, M. Nakamura, K. Ogohara, M. Sato, T. M. Sato, M. Suzuki, M. Taguchi, S. Takagi, M. Ueno, S. Watanabe, M. Yamada, A. Yamazaki
  • Journal Title: Nature Geosci. Volume: 10 Issue: 2 Pages: 85-88
  • DOI: 10.1038/ngeo2873
  • Peer Reviewed / Open Access
• [Journal Article] AKATSUKI returns to Venus (2016)
  • Author(s): Nakamura, M., Imamura, T., Ishii, N., Abe, T., Kawakatsu, Y., et al. (Sato, T.M. 52名中38番目)
  • Journal Title: Earth, Planets and Space Volume: - Issue: 1 Pages: 68-75
  • DOI: 10.1186/s40623-016-0457-6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Ground-based observation of the cyclic nature and temporal variability of planetary-scale UV features at the Venus cloud top level (2016)
  • Author(s): M. Imai, Y. Takahashi, M. Watanabe, T. Kouyama, S. Watanabe, S. Gouda, Y. Gouda
  • Journal Title: Icarus Volume: 278 Pages: 204-214
  • DOI: 10.1016/j.icarus.2016.06.011
  • Peer Reviewed / Open Access
• [Journal Article] Plasma dynamics in Saturn’s middle-latitude ionosphere and implications for magnetosphere-ionosphere coupling (2016)
  • Author(s): Shotaro Sakai and Shigeto Watanabe
  • Journal Title: Icarus Volume: 10 Pages: 1-11
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Industry-University Cooperation and University’s Education using Space Big Data (2015)
  • Author(s): Shigeto Watanabe, Yuuichi Kaga, Akemi Maeta, Naoko Ishiga, Atsushi Ueda
  • Journal Title: 9th International Conference on Project Management Volume: E05 Pages: 460-463
  • Peer Reviewed / Open Access
• [Journal Article] Science of atmospheric phenomena with JEM-EUSO (2015)
  • Author(s): J.H. Adams, S. Watanabe,...,
  • Journal Title: EXPERIMENTAL ASTRONOMY Volume: 40 Pages: 3-17
  • Peer Reviewed / Open Access
• [Journal Article] The infrared camera onboard JEM-EUSO (2015)
  • Author(s): J.H. Adams, S. Watanabe,...,
  • Journal Title: EXPERIMENTAL ASTRONOMY Volume: 40 Pages: 61-89
• [Presentation] Neutral Wind Measurements by Sounding Rockets (2017)
  • Author(s): S. Watanabe. Abe, etc
  • Organizer: International Symposium on Space Technology and Science
  • Int'l Joint Research / Invited
• [Presentation] Recent Activity of Japanese Sounding Rocket Experiments for the Thermospheric and Ionospheric Study (2017)
  • Author(s): Abe, Watanabe, etc
  • Organizer: International Symposium on Space Technology and Science
  • Int'l Joint Research / Invited
• [Presentation] IMPROVEMENTS, VALIDATION AND USAGE OF IRI; A REVIEW (2017)
  • Author(s): Bilitza, Watanabe, etc
  • Organizer: XXXIInd International Union of Radio Science
  • Int'l Joint Research / Invited
• [Presentation] MODELING OF PLASMASPHERE (2017)
  • Author(s): S. Watanabe
  • Organizer: XXXIInd International Union of Radio Science
  • Int'l Joint Research / Invited
• [Presentation] Modeling of Plasmasphere (2017)
  • Author(s): S. Watanabe
  • Organizer: COSPAR/IRI
  • Int'l Joint Research / Invited
• [Presentation] Exploring the Earth's Environments from Space (2017)
  • Author(s): S. Watanabe
  • Organizer: The International Conference on Science and Technology
  • Int'l Joint Research / Invited
• [Presentation] Coupling of Neutral Atmosphere with Plasma in the Upper Atmosphere (2016)
  • Author(s): Watanabe, Shigeto
  • Organizer: Proceedings of the 30th Atmospheric Science Symposium, JAXA
  • Place of Presentation: JAXA/ISAS
  • Year and Date: 2016-12-05
  • Invited
• [Presentation] 金星探査機あかつき搭載中間赤外カメラ（LIR)が捉えた雲頂温度の弓状構造 (2016)
  • Author(s): 福原, 哲哉; 二口, 将彦; はしもと, じょーじ; 堀之内, 武; 今村, 剛; 岩上, 直幹; 神山, 徹; 村上, 真也; 中村, 正人; 小郷原, 一智; 佐藤, 光輝; 佐藤, 隆雄; 鈴木, 睦; 田口, 真; 高木, 聖子; 上野, 宗孝; 渡部, 重十; 山田, 学; 山崎, 敦
  • Organizer: 30th Atmospheric Science Symposium
  • Place of Presentation: JAXA/ISAS
  • Year and Date: 2016-12-05
• [Presentation] あかつき金星紫外画像に見られる地形固定構造 (2016)
  • Author(s): 北原岳彦, 今村 剛, 渡部重十, 山崎敦, 山田学
  • Organizer: 30th Atmospheric Science Symposium
  • Place of Presentation: JAXA/ISAS
  • Year and Date: 2016-12-05
• [Presentation] Preliminary results on Venusian cloud scattering property observed by the UV imager on board Akatsuki (2016)
  • Author(s): Lee, Yeon Joo; Yamada, Manabu; Yamazaki, Atsushi; Watanabe, Shigeto; Sato, Takao; Imamura, Takeshi
  • Organizer: 30th Atmospheric Science Symposium
  • Place of Presentation: JAXA/ISAS
  • Year and Date: 2016-12-05
• [Presentation] 金星探査機「あかつき」の撮像データを用いた雲追跡による大気擾乱研究 (2016)
  • Author(s): 堀之内, 武; 村上, 真也; 神山, 徹; 小郷原, 一智; 今村, 剛; 高木, 征弘; 樫村, 博基; Peralta, Javier; 山田, 学; 山崎, 敦; 渡部, 重十; 佐藤, 毅彦; 佐藤, 隆雄; 中村, 正人
  • Organizer: 30th Atmospheric Science Symposium
  • Place of Presentation: JAXA/ISAS
  • Year and Date: 2016-12-05
• [Presentation] Neutral Wind Observations below 200 km altitudes (2015)
  • Author(s): S. Watanabe
  • Organizer: American Geophysical Union
  • Place of Presentation: San Francisco
  • Year and Date: 2015-12-16
  • Int'l Joint Research
• [Presentation] Upper Boundary of Ionosphere (2015)
  • Author(s): S. Watanabe
  • Organizer: IRI workshop
  • Place of Presentation: Bangkok
  • Year and Date: 2015-11-12
  • Int'l Joint Research
• [Presentation] Coupling between ionosphere and thermosphere at low latitudes (2015)
  • Author(s): S. Watanabe
  • Organizer: IRI workshop
  • Place of Presentation: Bangkok
  • Year and Date: 2015-11-10
  • Int'l Joint Research
• [Presentation] Correction of heating rate of thermal electron by photoelectron (2015)
  • Author(s): Y. Kakinami, S. Watanabe
  • Organizer: IRI workshop
  • Place of Presentation: Tokyo
  • Year and Date: 2015-11-09
  • Int'l Joint Research
• [Presentation] Structure and Dynamic of Thermosphere (2015)
  • Author(s): S. Watanabe
  • Organizer: MIT Symposium
  • Place of Presentation: Tokyo
  • Year and Date: 2015-09-30
  • Int'l Joint Research / Invited