Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

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

[P-EM10] Multi-scale Coupling in the Magnetosphere-Ionosphere-Thermosphere System

Mon. May 27, 2019 3:30 PM - 5:00 PM A05 (TOKYO BAY MAKUHARI HALL)

convener:Yue Deng(University of Texas at Arlington), Toshi Nishimura(Boston University), Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yanshi Huang(Harbin Institute of Technology, Shenzhen), Chairperson:Yue Deng(University of Texas at Arlington), Huixin Liu(Kyushu University, Japan), Yanshi Huang(Harbin Institute of Technology, Shenzhen, China), Yukitoshi Nishimura(Boston University)

4:15 PM - 4:30 PM

[PEM10-04] Multiscape Coupling of Sub-auroral Polarization Streams

*Nozomu Nishitani1, Tomoaki Hori1 (1.Institute for Space-Earth Environmental Research, Nagoya University)

Keywords:multiscale coupling, SuperDARN Hokkaido East / West radars, sub-auroral polarization stream (SAPS)

Sub-Auroral Polarization Streams (SAPS) are fast westward flows slightly equatorward of the auroral precipitation boundary, and manifestations of magnetosphere-coupling processes. Recenty it was shown that SAPS sometimes contain perturbation in westward speed, typically with temporal scale of a few minutes (e.g., Hori et al., GRL, 2018). However, it has not yet been clear how small the temporal scales of these perturbations can be and how perturbations with different temporal scales are related to each other. In this paper, multiscape coupling of the sub-auroral polarization streams will be studied, using multiple events observed mainly by the SuperDARN Hokkaido East / West radars.