Theoretical study of the ionospheric plasma cave in the equatorial ionization anomaly region

NCUIR > College of Earth Sciences > DEPARTMENT OF SPACE SCIENCE AND ENGINEERING > journal & Dissertation > Item 987654321/102353

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Title:	Theoretical study of the ionospheric plasma cave in the equatorial ionization anomaly region
Authors:	張起維;Chen, Yu-Tsung;Lin, C. H.;Chen, C. H.;Liu, J. Y.;Huba, J. D.;Chang, L. C.;Liu, H.-L.;Lin, J. T.;Rajesh, P. K.
Contributors:	地球科學學院太空科學與工程學系
Keywords:	Anomalies;Caves;Computer simulation;Convergence;Electron density;Equator;Equatorial ionization anomaly;Equatorial ionosphere;Equatorial regions;Ionization;Ionosphere;Ionospheric plasma;Ionospherics;Magnetic equator;Plasma;Plasma (physics);plasma cave;SAMI3;TIME-GCM;Wind;Wind variations
Date:	2014-01-01
Issue Date:	2026-04-23 11:06:48 (UTC+8)
Publisher:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
Abstract:	摘要： This paper investigates the physical mechanism of an unusual equatorial electron density structure, plasma cave, located underneath the equatorial ionization anomaly by using theoretical simulations. The simulation results provide important new understanding of the dynamics of the equatorial ionosphere. It has been suggested previously that unusual E⇀×B⇀ drifts might be responsible for the observed plasma cave structure, but model simulations in this paper suggest that the more likely cause is latitudinal meridional neutral wind variations. The neutral winds are featured by two divergent wind regions at off‐equator latitudes and a convergent wind region around the magnetic equator, resulting in plasma divergences and convergence, respectively, to form the plasma caves structure. The tidal‐decomposition analysis further suggests that the cave related meridional neutral winds and the intensity of plasma cave are highly associated with the migrating terdiurnal tidal component of the neutral winds. Key Points This paper is the first simulation study for the ionospheric plasma cave The plasma cave can be successfully reproduced by SAMI3 with neutral wind model The atmosphere‐ionosphere interaction is important for plasma cave structure 其他題名： J. Geophys. Res. Space Physics 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2014-12 出處： Journal of geophysical research : Space physics (2013 - Present), 2014-12, Vol.119 (12), p.10,324-10,335 資源來源： Wiley Online Library 版權： 2014. American Geophysical Union. All Rights Reserved. 版權： 2015. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 2169-9380 識別號： ISSN: 2169-9402 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/2014JA020235
Appears in Collections:	[DEPARTMENT OF SPACE SCIENCE AND ENGINEERING] journal & Dissertation

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