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Equatorial Plasma Bubbles Encounter With the Nighttime Ionosphere Enhancement.

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Title: Equatorial Plasma Bubbles Encounter With the Nighttime Ionosphere Enhancement.
Authors: Zhang, Min1 (AUTHOR), Chen, Gang1 (AUTHOR) g.chen@whu.edu.cn, Xu, Jiyao2 (AUTHOR), Yan, Chunxiao2 (AUTHOR) cxyan@spaceweather.ac.cn, Yang, Muchen1 (AUTHOR), Wu, Kun3 (AUTHOR), Zhang, Shaodong1 (AUTHOR), Yuan, Wei2 (AUTHOR), Yan, Jingye2 (AUTHOR), Hu, Lianhuan4 (AUTHOR), Wang, Yungang5 (AUTHOR), Huang, Kaiming1 (AUTHOR), Gong, Wanlin1 (AUTHOR), Li, Yaxian1 (AUTHOR), Hu, Pengfei1 (AUTHOR)
Source: Journal of Geophysical Research. Space Physics. Mar2026, Vol. 131 Issue 3, p1-15. 15p.
Subject Terms: Ionospheric disturbances, Plasma diffusion, Plasma density, Ionosondes, Radar signal processing
Abstract: On the two consecutive days of February 26–27, 2014, the all‐sky airglow imager in Qujing observed Equatorial Plasma Bubbles (EPBs) dissipating more rapidly than those that appeared before and after. While these rapidly dissipating EPBs were present, the Hainan COherent‐scatter Phased Array Radar (HCOPAR) detected Field‐Aligned Irregularities (FAIs) within them. These FAIs first descended and then rose. The vertical extent of the fluctuations exceeded 100 km. Observations from four ionosondes at different latitudes showed a consistent pattern over the two nights. The F‐layer height initially ascended and then rapidly descended. Plasma from higher altitudes was compressed to lower altitudes, which resulted in a significant increase in peak density. As a result, Nighttime Ionosphere Enhancement (NIE) occurred. At first, the FAIs descended along with the F‐layer. After a while, they began to rise again. The downward movement is believed to have accelerated the decay of EPBs in the NIE region. Key Points: Some equatorial plasma bubbles dissipated noticeably faster than average on two consecutive days during nighttime ionosphere enhancementFor the bubbles that dissipated more quickly, the strong 3 m scale field‐aligned irregularities in them descended ∼100 km in ∼20 minThe bubbles that moved down suffered stronger diffusion and dissipated more quickly [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Equatorial Plasma Bubbles Encounter With the Nighttime Ionosphere Enhancement.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Min%22">Zhang, Min</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Gang%22">Chen, Gang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> g.chen@whu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Jiyao%22">Xu, Jiyao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Chunxiao%22">Yan, Chunxiao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> cxyan@spaceweather.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Muchen%22">Yang, Muchen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Kun%22">Wu, Kun</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Shaodong%22">Zhang, Shaodong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuan%2C+Wei%22">Yuan, Wei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Jingye%22">Yan, Jingye</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Lianhuan%22">Hu, Lianhuan</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yungang%22">Wang, Yungang</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Kaiming%22">Huang, Kaiming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gong%2C+Wanlin%22">Gong, Wanlin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Yaxian%22">Li, Yaxian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Pengfei%22">Hu, Pengfei</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Space+Physics%22">Journal of Geophysical Research. Space Physics</searchLink>. Mar2026, Vol. 131 Issue 3, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Ionospheric+disturbances%22">Ionospheric disturbances</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+diffusion%22">Plasma diffusion</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+density%22">Plasma density</searchLink><br /><searchLink fieldCode="DE" term="%22Ionosondes%22">Ionosondes</searchLink><br /><searchLink fieldCode="DE" term="%22Radar+signal+processing%22">Radar signal processing</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: On the two consecutive days of February 26–27, 2014, the all‐sky airglow imager in Qujing observed Equatorial Plasma Bubbles (EPBs) dissipating more rapidly than those that appeared before and after. While these rapidly dissipating EPBs were present, the Hainan COherent‐scatter Phased Array Radar (HCOPAR) detected Field‐Aligned Irregularities (FAIs) within them. These FAIs first descended and then rose. The vertical extent of the fluctuations exceeded 100 km. Observations from four ionosondes at different latitudes showed a consistent pattern over the two nights. The F‐layer height initially ascended and then rapidly descended. Plasma from higher altitudes was compressed to lower altitudes, which resulted in a significant increase in peak density. As a result, Nighttime Ionosphere Enhancement (NIE) occurred. At first, the FAIs descended along with the F‐layer. After a while, they began to rise again. The downward movement is believed to have accelerated the decay of EPBs in the NIE region. Key Points: Some equatorial plasma bubbles dissipated noticeably faster than average on two consecutive days during nighttime ionosphere enhancementFor the bubbles that dissipated more quickly, the strong 3 m scale field‐aligned irregularities in them descended ∼100 km in ∼20 minThe bubbles that moved down suffered stronger diffusion and dissipated more quickly [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1029/2024JA033324
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      – Code: eng
        Text: English
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        PageCount: 15
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    Subjects:
      – SubjectFull: Ionospheric disturbances
        Type: general
      – SubjectFull: Plasma diffusion
        Type: general
      – SubjectFull: Plasma density
        Type: general
      – SubjectFull: Ionosondes
        Type: general
      – SubjectFull: Radar signal processing
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      – TitleFull: Equatorial Plasma Bubbles Encounter With the Nighttime Ionosphere Enhancement.
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              Text: Mar2026
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