[E] 口頭発表
セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境
コンビーナ:Connors Martin G(Athabasca University)、塩川 和夫(名古屋大学宇宙地球環境研究所)
Recent studies, including some facilitated by citizen science, have shown the subauroral ionosphere to be more active than previously suspected. Unusual emissions, from SAR arcs to STEVE, indicate previously little studied physical processes in this region. Some arise from conjugacy to the radiation belts, while others have origins which remain unclear. This session attempts to stimulate synthesis of observations from different domains to address phenomena which appear difficult to explain when examined from only one of the many new sources of information about the subauroral zone. Optical observations have expanded to include those with the very high resolution of amateur DSLR cameras, yet this sporadic source is well complemented by continuous observation from the few comprehensive subauroral observatories. As ever, conjugacy with spacecraft plays an important role in assessing possible sources of precipitation or waves that may stimulate the subauroral ionosphere, and there are indeed now many space assets (RBSP, Arase, THEMIS, MMS) with footprints at least sometimes in that region. Various polar-orbiting low-altitude satellites traverse it regularly. The installation of low-latitude poleward-looking incoherent scatter radars, with large fields of view in the subauroral zone, also provides context and the ability to extract physical parameters continuously. The sometimes-extreme conditions now known to exist in the subauroral region have stimulated theory to expand the parameter range needed to explain ionospheric phenomena. We welcome contributions integrating multiple sources of observation and theoretical approaches to hopefully transform what is initially surprising into a new view of an unsuspectedly active region.
*Nishimura Toshi 1、Yang Jian2、Donovan Eric3、Angelopoulos Vassilis4、Nishitani Nozomu5 (1.Boston University、2.Southern University of Science and Technology、3.University of Calgary、4.University of California, Los Angeles、5.Nagoya University)
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*Robert L Lysak1、Yan Song1、Colin L Waters2、Murray D Sciffer2、Yuki Obana3 (1.University of Minnesota、2.University of Newcastle、3.Osaka Electrocommunication University)
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*Sneha Yadav1,2、Kazuo Shiokawa1、Yuichi Otsuka1、Martin G Connors3、Jean-Pierre St. Maurice4,5 (1.Institute for Space-Earth Environmental Research、2.Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, India、3.Athabasca University Observatories, Athabasca University, Athabasca, Alberta, Canada、4.Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada、5.Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada)
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*大矢 浩代1、宮下 拓也1、土屋 史紀2、平井 あすか2、尾崎 光紀3、塩川 和夫4、三好 由純4、西谷 望4、堀 智昭4、寺本 万里子5、Connors Martin6、Shepherd Simon7、笠原 禎也3、熊本 篤志2、小路 真史4、篠原 育8、中田 裕之1、鷹野 敏明1 (1.千葉大学大学院工学研究院、2.東北大学、3.金沢大学、4.名古屋大学、5.九州工業大学、6.アサバスカ大学、7.ダートマス大学、8.宇宙航空研究開発機構)
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*Paul Prikryl1,2、James M. Weygand3、Reza Ghoddousi-Fard4、Bharat S. R. Kunduri5、P. T. Jayachandran1、Knut S. Jacobsen6、Yngvild L. Andalsvik6、Tibor Durgonics7、Kjerrmar Oksavik8,9 (1.Physics Department University of New Brunswick, Canada、2. Geomagnetic Laboratory Natural Resources Canada、3.Earth Planetary and Space Sciences, University of California, USA、4.Canadian Geodetic Survey Natural Resources Canada 、5.Bradley Dept. of Electrical and Computer Engineering, Virginia Tech, USA、6.Norwegian Mapping Authority, Norway、7.National Space Institute, Technical University of Denmark, Denmark、8.Department of Physics and Technology, University of Bergen, Norway、9.Arctic Geophysics, University Centre in Svalbard, Norway)
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Discussion (17:25 〜 17:30)