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Reverse Fountain and the Nighttime Enhancement in the Ionospheric Electron Density Over the Equatorial Region: A Case Study
http://hdl.handle.net/2237/00032722
http://hdl.handle.net/2237/000327229d221155-ac1c-4245-8d26-a29cc36fe10b
名前 / ファイル | ライセンス | アクション |
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2019JA027286 (13.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-10-13 | |||||
タイトル | ||||||
タイトル | Reverse Fountain and the Nighttime Enhancement in the Ionospheric Electron Density Over the Equatorial Region: A Case Study | |||||
言語 | en | |||||
著者 |
Yadav, Sneha
× Yadav, Sneha× Choudhary, R. K.× Kumari, Jyoti× Sunda, Surendra× Shreedevi, P. R.× Pant, Tarun. K. |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | © 2020 American Geophysical Union | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | equatorial ionosphere | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ionospheric nighttime enhancement | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | equatorial ionization anomaly | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | satellite‐based augmentation system | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | total electron content | |||||
抄録 | ||||||
内容記述 | This paper focuses on the linkage between reverse fountain effect and anomalous enhancement in the nighttime electron density over the equatorial ionosphere often referred as the ionospheric nighttime enhancement (INE). The Global Positioning System (GPS)‐derived total electron content (TEC) measurements over two Indian equatorial stations and ionosonde measurements are used to investigate the occurrence characteristics and mechanism of the premidnight and postmidnight INE events. The high‐resolution spatiotemporal two‐dimensional (2D) TEC maps generated by using satellite‐based augmentation system are used to visualize the reverse fountain effect. These TEC maps are found to be effective in envisaging the motion of equatorial ionization anomaly (EIA) in nighttime ionosphere and its impact on the distribution of electron density over the equatorial region. Salient features of this case study illustrate that, accompanying enhancements in the nighttime TEC, there exist decrease in the F2 layer height, prevalence of downward vertical plasma drift, and dramatic increase in the F2 region electron density. The 2D‐TEC maps reveal the persistence of well‐developed EIA until late evening hours and its gradual shift toward equator during the events of postmidnight INEs. It is found out that the premidnight INE is not invariably linked to the prereversal enhancement of the zonal electric field and could be associated with the redistribution of electron density caused by the reverse fountain effect. The present observations indicate that although the westward electric field serves as a prime driver, the INEs over the equatorial regions are associated with plasma motions caused by the retreating anomaly. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | ファイル公開:2020-11-01 | |||||
言語 | ja | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Wiley | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1029/2019JA027286 | |||||
ISSN(print) | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2169-9380 | |||||
書誌情報 |
en : Journal of Geophysical Research: Space Physics 巻 125, 号 5, p. e2019JA027286, 発行日 2020-05 |
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著者版フラグ | ||||||
値 | publisher |