TEC evidence for near-equatorial energy deposition by 30 keV electrons in the topside ionosphere

NCUIR > Research Center > Global Atmosphere Observation and Data Application Research Center > journal & Dissertation > Item 987654321/103190

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103190

Title:	TEC evidence for near-equatorial energy deposition by 30 keV electrons in the topside ionosphere
Authors:	蘇亞拉;Suvorova, A. V.;Dmitriev, A. V.;Tsai, L.-C.;Kunitsyn, V. E.;Andreeva, E. S.;Nesterov, I. A.;Lazutin, L. L.
Contributors:	全球大氣觀測與資料應用研究中心
Keywords:	Electrons;geomagnetic storms;Geophysics;Ionization;Ionosphere;Latitude;positive ionospheric storm;quasi-trapped electron enhancements;Storms
Date:	2013-01-01
Issue Date:	2026-04-23 11:25:15 (UTC+8)
Publisher:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
Abstract:	摘要： Observations of energetic electrons (10 – 300 keV) by NOAA/POES and DMSP satellites at heights <1000 km during the period from 1999 to 2010 allowed finding abnormal intense fluxes of ~106 – 107 cm−2 s−1 sr−1 for quasi‐trapped electrons appearing within the forbidden zone of low latitudes over the African, Indo‐China, and Pacific regions. Extreme fluxes appeared often in the early morning and persisted for several hours during the maximum and recovery phase of geomagnetic storms. We analyzed nine storm time events when extreme electron fluxes first appeared in the Eastern Hemisphere, then drifted further eastward toward the South‐Atlantic Anomaly. Using the electron spectra, we estimated the possible ionization effect produced by quasi‐trapped electrons in the topside ionosphere. The estimated ionization was found to be large enough to satisfy observed storm time increases in the ionospheric total electron content (TEC) determined for the same spatial and temporal ranges from global ionospheric maps. Additionally, extreme fluxes of quasi‐trapped electrons were accompanied by the significant elevation of the low‐latitude F‐layer obtained from COSMIC/FORMOSAT‐3 radio occultation measurements. We suggest that the storm time ExB drift of energetic electrons from the inner radiation belt is an important driver of positive ionospheric storms within low‐latitude and equatorial regions. Key Points Ionospheric ionization and energetic electrons were studied at low latitudes Positive ionospheric storms correlate well with electron enhancements ExB electron drift results in additional ionization of the ionosphere 其他題名： J. Geophys. Res. Space Physics 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2013-07 出處： Journal of geophysical research : Space physics (2013 - Present), 2013-07, Vol.118 (7), p.4672-4695 資源來源： Wiley Online Library - AutoHoldings Journals 版權： 2013. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 2169-9380 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/jgra.50439
Appears in Collections:	[Global Atmosphere Observation and Data Application Research Center] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	25	View/Open

社群 sharing

Loading...