Investigation of numerical methods for prediction of the ionospheric disturbances with observations and numerical simulations

2013 Fiscal Year Final Research Report

• Project/Area Number: 23340144
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Seikei University
• Principal Investigator: FUJIWARA Hitoshi 成蹊大学, 理工学部, 教授 (50298741)
• Co-Investigator(Kenkyū-buntansha): MIYOSHI Yasunobu 九州大学, 理学研究院, 准教授 (20243884) ; JIN Hidekatsu 情報通信研究機構, 電磁波計測研究センター, 主任研究員 (60466240) ; SHINAGAWA Hiroyuki 情報通信研究機構, 電磁波計測研究センター, 主任研究員 (00262915) ; NOZAWA Satonori 名古屋大学, 太陽地球環境研究所, 准教授 (60212130) ; OGAWA Yasunobu 国立極地研究所, 研究教育系, 准教授 (00362210)
• Co-Investigator(Renkei-kenkyūsha): YAMAMOTO Mamoru 京都大学, 生存圏研究所, 教授 (20210560) ; SAITO Akinori 京都大学, 大学院・理学研究科, 准教授 (10311739)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 極域電離圏 / 熱圏 / EISCATレーダー / 太陽風 / オーロラ / ナトリウムライダー / 大気波動 / シミュレーション

Research Abstract

We have studied auroral energy inputs and atmopheric waves, which are originated in the lower atmosphere, in the polar upper atmosphere. The resultant ionospheric and thermospheric variations have been also investigated both from radar and lidar observations and numerical simulations. From the radar and lidar observations, we have clarified some characteristics of the ionospheric and thermospheric variations in the periods from the solar minimum to maximum. The numerical simulations have shown enhancements of the thermospheric wind and temperature depending on the polar cap/auroral oval size. In addition, some numerical simulations were performed to reproduce the ionospheric and thermospheric variations due to propagation of the atmospheric waves from the lower atmosphere.

Research Products

• [Journal Article] The neutral dynamics during the 2009 sudden stratosphere warming simulated by different whole atmosphere models (2014)
  • Author(s): Pedatella, N. M., T. Fuller-Rowell, H. Wang, H. Jin, Y. Miyoshi, H. Fujiwara, H. Shinagawa, H.-L. Liu, F. Sassi, H. Schmidt, V. Matthias and L. Goncharenko
  • Journal Title: J. Geophys. Res. Space Physics Volume: 119 Pages: 1306-1324
  • DOI: 10.1002/2013JA019421
• [Journal Article] Wave-4 structure of the neutral density in the thermosphere and its relation to atmospheric tides (2012)
  • Author(s): Miyoshi, Y., H. Jin, H. Fujiwara, H. Shinagawa, and H. Liu
  • Journal Title: Journal of Atmospheric and Solar-Terrestrial Physics
  • DOI: 10.1016/j.jastp.2011.12.002
• [Journal Article] Polar cap thermosphere and ionosphere during the solar minimum period : EISCAT Svalbard radar observations and GCM simulations (2012)
  • Author(s): Fujiwara. H., S. Nozawa, S. Maeda, Y. Ogawa, Y. Miyoshi, H. Jin, H. Shinagawa, and K. Terada
  • Journal Title: Earth Planets Space Volume: 64 Pages: 459-465
• [Presentation] Polar aeronomy with EISCAT_3D and GCM simulations (2013)
  • Author(s): 藤原 均, 野澤悟徳, 小川泰信, 三好勉信, 陣英克, 品川裕之
  • Organizer: 日本地球惑星科学連合 2013年大会
  • Place of Presentation: 千葉県幕張メッセ
  • Year and Date: 20130519-24
• [Presentation] 太陽活動極大期における EISCAT レーダー観測とGCM シミュレーションによる極域熱圏電離圏研究 (2012)
  • Author(s): 藤原 均, 野澤悟徳, 小川泰信, 片岡龍峰, 三好勉信, 陣英克, 品川裕之
  • Organizer: 地球電磁気・地球惑星圏学会第132回総会・講演会
  • Place of Presentation: 札幌コンベンションセンター,北海道
  • Year and Date: 2012-10-22
• [Presentation] Investigation of the global thermosphere and ionosphere from GCM simulations with observational data (2011)
  • Author(s): Fujiwara, H., Y. Miyoshi, H. Jin, H. Shinagawa, K. Terada, S. Nozawa, Y. Ogawa, A. Saito, Y. Otsuka, and M. Ishii
  • Organizer: the Asia Oceania Geo-sciences Society 8th Annual Meeting (AOGS 2011)
  • Place of Presentation: Taipei
  • Year and Date: 20110808-12
  • Invited
• [Remarks]
  • URL: https://sites.google.com/site/hfujiwara630/home