Japan Geoscience Union Meeting 2019

Presentation information

[E] Poster

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 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

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)

[PEM10-P05] Statistical study of the relationship between ion upflow and field-aligned current in the topside ionosphere for both hemispheres during disturbed and quiet times

Shan-Yu Zhou1, *Qing-He Zhang1, P. T. Jayachandran2, Kjellmar Oksavik3, Larry Lyons4, Zan-Yang Xing1, Yu-Zhang Ma1, Marc Hairston5, Yong Wang1 (1.Institute of Space Sciences, Shandong University, Weihai, China, 2.Physics Department, University of New Brunswick, Fredericton, New Brunswick, Canada, 3.Birkeland Centre for Space Science, University of Bergen, Bergen, Norway, 4.Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, California, USA, 5.William B. Hanson Center for Space Sciences, University of Texas at Dallas, Richardson, Texas, USA)

Keywords:Ion upflows, Field-aligned current, Magnetosphere-ionosphere coupling

A statistical study of ion upflow and field-aligned currents (FACs) has been performed in the topside ionosphere of both hemispheres for magnetic quiet and disturbed times by using DMSP satellite observations from 2010-2013. Distributions in MLT/MLAT reveal that ion upflow shows a dawn-dusk asymmetry distribution that corresponds well with the region 1 field-aligned currents. In addition, there are highest occurrence regions near noon and within the near midnight auroral disturbance area. These correspond to cusp and nightside dynamical processes, respectively. Both the ion upflow occurrence and FAC regions expand equatorward to a wider area during disturbed times.