Japan Geoscience Union Meeting 2018

Presentation information

[EE] Evening Poster

P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM13] Study of coupling processes in solar-terrestrial system

Sun. May 20, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Mamoru Yamamoto(Research Institute for Sustainable Humanosphere, Kyoto University), Yasunobu Ogawa(National Institute of Polar Research), Satonori Nozawa(名古屋大学宇宙地球環境研究所, 共同), Akimasa Yoshikawa(Department of Earth and Planetary Sciences, Kyushu University)

[PEM13-P11] Multi-instrument observations of periodic poleward moving polar arcs

*Zan-Yang Xing1, Qing-He Zhang1, P. T. Jayachandran2, Yong-Liang Zhang3, Jun Liang4, De-Sheng Han5, Yong WANG1, Yu-Zhang Ma1, Ze-Jun Hu6 (1.Institute of Space Sciences, Shandong University at Weihai, 2.University of New Brunswick, 3.Applied Physics Laboratory, The Johns Hopkins University, 4.University of Calgary, 5.Tongji University, 6.Polar Research Institute of China)

Keywords:Polar arcs, Periodic poleward moving, flow shears

We report results based on a study of periodic poleward moving arcs observed by multi ground-based and space-based instruments on January 3, 2014. The instruments includ the all-sky imagers at Resolute Bay (RSB), the spaced-based SSUSI imager onboard DMSP spacecraft, GPS receivers at RSB, Resolute Bay Incoherent Scatter Radar-North (RISR-N) and SuperDARN radars. The observation periodic features of polar arcs from individual instruments are consistent with each other. The ASI imagers showed the polar arcs were repeatedly detached from the dawnside auroral oval and then moved poleward under positive IMF By conditions. Furthermore, some periodic spatial arcs are observed from the DMSP SSUSI imagers, and some periodic structured significant E-region plasmas are observed from the RISR-N data, together with periodic TEC variations observed from GPS receivers. We also observed strong flow shears around these arcs with boundary layers precipitating particles. Based on these observational results, we suggest that these periodic poleward moving arcs may be triggered by local processes associated with flow shears at the boundary layer regions.