Quantitative modeling of the inner magnetospheric environment using data assimilation

• Project/Area Number: 19740306
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Space and upper atmospheric physics
• Research Institution: The Institute of Statistical Mathematics
• Principal Investigator: NAKANO Shin'ya The Institute of Statistical Mathematics, モデリング研究系, 助教 (40378576)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥2,950,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥450,000); Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥1,000,000 (Direct Cost: ¥1,000,000)
• Keywords: 地球惑星磁気圏・磁気嵐 / リングカレント / データ同化 / 磁気嵐 / リングウレント

Research Abstract

We have developed a data assimilation technique for incorporating in-situ data of the ring current plasma obtained by multiple spacecraft into a kinetic numerical simulation model. Under the conditions that the spacecraft are sufficiently distributed, general features in the distributions of plasma and electric potential are well reconstructed. We have also developed a data assimilation technique for modeling the plasmasphere using ultra-violet imaging data.

Research Products

• [Journal Article] Estimation of a long-term variation of a magnetic- storm index using the merging particle filter (2009)
  • Author(s): S. Nakano, T. Higuchi
  • Journal Title: IEICE Transactions on Information and Systems v.E92-D Pages: 1382-1387
  • Peer Reviewed
• [Journal Article] Estimation of a long-term variation of a magnetic- storm index using the merging particle filter (2009)
  • Author(s): S.Nakano, T.Higuchi
  • Journal Title: IEICE Transactions on Information and Systems E92-D Pages: 1382-1387
  • Peer Reviewed
• [Journal Article] Impact of the solar-wind dynamic pressure on the Region-2 field-aligned currents (2009)
  • Author(s): S. Nakano, G. Ueno, S. Ohtani, and T. Hiauchi
  • Journal Title: Journal of Geophysical Research 114
  • Peer Reviewed
• [Journal Article] A method for estimating the ring current structure and the electric potential distribution using ENA data assimilation (2008)
  • Author(s): S. Nakano, G. Ueno, Y. Ebihara, M. -C. Fok, S. Ohtani, P.C. Brandt, D.G. Mitchell, K. Keika, T. Higuchi
  • Journal Title: Journal of Geophysical Research v.113
  • Peer Reviewed
• [Journal Article] A method for estimating the ring current structure and the electric potential distribution using ENA data assimilation (2008)
  • Author(s): S. Nakano, et.al.
  • Journal Title: Journal of Geophysical Research 113
  • Peer Reviewed
• [Journal Article] ENA Occultation : New remote sensing technique to study the lunar exosphere (2008)
  • Author(s): Y. Futaana, S. Nakano, M. Wieser, and S. Barabash
  • Journal Title: Journal of Geophysical Research 113
  • Peer Reviewed
• [Journal Article] Merging particle filterとその特性 (2008)
  • Author(s): 中野慎也, 上野玄太, 中村和幸, 樋口知之
  • Journal Title: 統計数理 56 Pages: 225-234
  • NAID: 120006019017
  • Peer Reviewed
• [Journal Article] Merging particle filter for sequential data assimilation (2007)
  • Author(s): S. Nakano, G. Ueno, T. Higuchi
  • Journal Title: Nonlinear Processes in Geophysics v.14 Pages: 395-408
  • Peer Reviewed
• [Journal Article] Merging particle filter for sequential data assimilation (2007)
  • Author(s): S. Nakano
  • Journal Title: Nonlinear Processes in Geophysics 14 Pages: 395-395
  • Peer Reviewed
• [Journal Article] A method for estimating the ring current structure and the electric potential distribution using ENA data assimilation
  • Author(s): S. Nakano
  • Journal Title: Journal of Geophysical Research (印刷中)
  • Peer Reviewed
• [Presentation] データ同化の考え方とその方法 (2009)
  • Author(s): 中野慎也
  • Organizer: MTI研究会
  • Place of Presentation: 京都市
  • Year and Date: 2009-12-01
• [Presentation] Merging particle filter for high-dimensional nonlinear problems (2009)
  • Author(s): S.Nakano, G.Ueno, T.Higuchi
  • Organizer: The 5th WMO symposium on data assimilation
  • Place of Presentation: Melbourne, Australia
  • Year and Date: 2009-10-04
• [Presentation] Feasibility of EUV data assimilation for the modeling of the plasmasphere (2009)
  • Author(s): 中野慎也, M.-C.Fok, P.C.Brandt, 樋口知之
  • Organizer: 第126回 地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: 金沢大学
  • Year and Date: 2009-09-28
• [Presentation] Merging particle filter による状態推定-宇宙科学への応用- (2009)
  • Author(s): 中野慎也, 他
  • Organizer: 2009年度 統計関連学会連合大会
  • Place of Presentation: 同志社大学(京田辺市)
  • Year and Date: 2009-09-08
• [Presentation] Development of an EUV data assimilation technique for plasmasphere modeling (2009)
  • Author(s): S.Nakano, M.-C.Fok, P.C.Brandt, T.Higuchi
  • Organizer: IAGA 2009 Scientific Assembly
  • Place of Presentation: Sopron, Hungary
  • Year and Date: 2009-08-28
• [Presentation] Statistical analysis of influence of the solar-wind pressure enhancement on the Region-2 field-aligned currents (2009)
  • Author(s): S.Nakano, G.Ueno, S.Ohtani, T.Higuchi
  • Organizer: IAGA 2009 Scientific Assembly
  • Place of Presentation: Sopron, Hungary
  • Year and Date: 2009-08-27
• [Presentation] データ同化による磁気圏プラズマ分布の推定 (2009)
  • Author(s): 中野慎也, 他
  • Organizer: 第58回理論応用力学講演会
  • Place of Presentation: 東京都港区
  • Year and Date: 2009-06-09
• [Presentation] Long-term component of the variation of the Dst index (2009)
  • Author(s): 中野慎也, 樋口知之
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 千葉市
  • Year and Date: 2009-05-16
• [Presentation] A data assimilation method for plasmasphere modeling using EUV imaging data (2009)
  • Author(s): S. Nakano, M. -C. Fok, P.C. Brandt, T. Higuchi
  • Organizer: AGU 2009 Fall Meeting
  • Place of Presentation: San Francisco, USA
• [Presentation] Monthly-scale variation of the Dst index and its relationship with solar-wind conditions (2009)
  • Author(s): S. Nakano, T. Higuchi
  • Organizer: IAGA 2009 Scientific Assembly
  • Place of Presentation: Sopron, Hungary
• [Presentation] Effects of the solar-wind dynamic pressure on the Region-2 field-aligned current intensity (2008)
  • Author(s): S. Nakano, G. Ueno, S. Ohtani, and T. Higuchi
  • Organizer: AGU2008 Fall Meeting
  • Place of Presentation: 米国・サンフランシスコ
  • Year and Date: 2008-12-19
• [Presentation] Data assimilation approach and its applications to the modeling of the dynamics in the magnetosphere (2008)
  • Author(s): S. Nakano
  • Organizer: International Symposium : Fifty Years after IGY - Modern Information Technologies and Earth and Solar Sciences-
  • Place of Presentation: つくば市
  • Year and Date: 2008-11-11
• [Presentation] Relationship between the Region-2 current intensity and the solar-wind dynamic pressure (2008)
  • Author(s): 中野慎也, 上野玄太, 大谷晋一, 樋口知之
  • Organizer: 第124回地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: 仙台市
  • Year and Date: 2008-10-09
• [Presentation] A feasibility study of ring current modeling using data assimilation of multi-satellite observations (2008)
  • Author(s): S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, and T. Higuchi
  • Organizer: AOGS 5th Annual General Meeting
  • Place of Presentation: 韓国・釜山
  • Year and Date: 2008-06-17
• [Presentation] データ同化による磁気圏リングカレント発達過程のモデリング (2008)
  • Author(s): 中野慎也, 他
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 千葉市
  • Year and Date: 2008-05-29
• [Presentation] Feasibility of data assimilation of multi-satellite measurements for ring current modeling (2008)
  • Author(s): 中野慎也, 上野玄太, 海化原祐輔,M.-C. Fok, 樋口知之
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 千葉市
  • Year and Date: 2008-05-29
• [Presentation] Data assimilation of energetic neutral atom data for two-dimensional modeling of the maanetospheric rina current (2008)
  • Author(s): S. Nakano, et.al.
  • Organizer: EGU General Assembly 2008
  • Place of Presentation: オーストリア・ウィーン
  • Year and Date: 2008-04-18
• [Presentation] A feasibility study of ring current modeling using data assimilation of multi-satellite observations (2008)
  • Author(s): S. Nakano, G. Ueno, Y. Ebihara, M. -C. Fok, T. Higuchi
  • Organizer: AOGS 5th Annual General Meeting, Busan
  • Place of Presentation: the Republic of Korea
• [Presentation] Variations in the ring current and inner-magnetospheric electric field deduced from data assimilation of IMAGE/HENA data (2007)
  • Author(s): S. Nakano
  • Organizer: AGU 2007 Fall Meeting
  • Place of Presentation: San Francisco
  • Year and Date: 2007-12-13
• [Presentation] Data assimilation approach for estimating unknown factors in akinetic ring current model (2007)
  • Author(s): 中野 慎也
  • Organizer: 第122回 地球電磁気・地球惑星圏学会講演会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2007-09-30
• [Presentation] Ring current modeling with an algorithm based on the particle filter/smoother (2007)
  • Author(s): S. Nakano
  • Organizer: 24th IUGG General Assembly
  • Place of Presentation: Perugia, Italy
  • Year and Date: 2007-07-06
• [Presentation] Quantitative modeling of the ring current using ENA data assimilation (2007)
  • Author(s): S. Nakano
  • Organizer: 24th IUGG General Assembly
  • Place of Presentation: Perugia, Italy
  • Year and Date: 2007-07-03
• [Presentation] Relationship between the ring current structure and the electric potential distribution in the inner-magnetosphere deduced from data assimilation (2007)
  • Author(s): 中野 慎也
  • Organizer: 日本地球惑星科学連合2007年大会
  • Place of Presentation: 千葉・幕張メッセ
  • Year and Date: 2007-05-24