Ionospheric Topside Diffusive Flux and the Formation of Summer Nighttime Ionospheric Electron Density Enhancement Over Millstone Hill

Yihui Cai, Xinan Yue, Wenbin Wang, Shun Rong Zhang, Huixin Liu, Jiuhou Lei, Zhipeng Ren, Yiding Chen, Feng Ding, Dexin Ren

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)

抄録

Ionospheric F-region electron density is anomalously higher in the evening than during the daytime on many occasions in the summer in geomagnetic mid-latitude regions. This unexpected ionospheric diurnal variation has been studied for several decades. The underlying processes have been suggested to be related to meridional winds, topside influx arising from sunset ionospheric collapse, and other factors. However, substantial controversies remain unresolved. Using a numerical model driven by the statistical topside O+ diffusive flux from the Millstone Hill incoherent scatter radar data, we provide new insight into the competing roles of topside diffusive flux, neutral winds, and electric fields in forming the evening density peak. Simulations indicate that while meridional winds, which turn equatorward before sunset, are essential to sustain the daytime ionization near dusk, the topside diffusive flux is critically important for the formation and timing of the summer evening density peak.

本文言語英語
論文番号e2021GL097651
ジャーナルGeophysical Research Letters
49
4
DOI
出版ステータス出版済み - 2月 28 2022

!!!All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 地球惑星科学一般

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