日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

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

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

2019年5月27日(月) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:Yue Deng(University of Texas at Arlington)、Toshi Nishimura(Boston University)、Liu Huixin(九州大学理学研究院地球惑星科学専攻 九州大学宙空環境研究センター)、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 Zhang1P. T. Jayachandran2Kjellmar Oksavik3Larry Lyons4Zan-Yang Xing1Yu-Zhang Ma1Marc Hairston5Yong 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)

キーワード: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.