Extreme Enhancements of Electron Temperature in Low Latitude Topside Ionosphere During the October 2016 Storm

Ruilong Zhang, Libo Liu, Han Ma, Yiding Chen, Huijun Le, Akimasa Yoshikawa

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

We use the in-situ observations of DMSP and SWARM satellites to report the changes of the topside ionospheric electron temperature during the October 2016 storm. Electron temperature in the afternoon sector dramatically increases in low latitudes in the recovery phase of the storm. Furthermore, the temperature enhancements have an obvious dependence on longitude and are mainly centralized around 100°–150°E in different satellite observations. The temperature enhancements attain more than 2,000 K at 840 km and 1,500 K at 450 km around the magnetic equator. The decrease in the electron-ion collision cooling rate, resulting from the lessened topside electron density, could not fully explain the temperature enhancement. At the same time, the electron densities in crests of the equatorial ionization anomaly are suppressed drastically at 100°–150°E, which cause a less heat conduction effect from the equatorial topside ionosphere to low altitudes via magnetic field lines and heat the topside ionospheric electron temperature. Further analysis indicates that dayside westward disturbance dynamo electric field presents a significant longitude structure and is a primary driver for the topside ionospheric temperature enhancement during the storm.

本文言語英語
論文番号e2022JA030278
ジャーナルJournal of Geophysical Research: Space Physics
127
3
DOI
出版ステータス出版済み - 3月 2022

!!!All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 宇宙惑星科学

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