An improved coupling model for the lithosphere-atmosphere-ionosphere system

NCUIR > College of Earth Sciences > DEPARTMENT OF SPACE SCIENCE AND ENGINEERING > journal & Dissertation > Item 987654321/102114

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Title:	An improved coupling model for the lithosphere-atmosphere-ionosphere system
Authors:	郭政靈;Kuo, C. L.;Lee, L. C.;Huba, J. D.
Contributors:	地球科學學院太空科學與工程學系
Keywords:	Atmosphere;Atmospheric models;Atmospherics;Current density;earthquake precursor;Electric fields;equatorial spread F;Ionosphere;ionospheric dynamics;Joining;Latitude;Lithosphere;lithosphere-atmosphere-ionosphere coupling;Magnetic fields;Mathematical models;plasma bubble;Rotating generators
Date:	2014-01-01
Issue Date:	2026-04-23 11:03:10 (UTC+8)
Publisher:	Wiley-Blackwell;Washington: Blackwell Publishing Ltd
Abstract:	摘要： AbstractIn our previous model for the lithosphere‐atmosphere‐ionosphere coupling, the background magnetic field was assumed to be perpendicular to the horizontal plane. In the present paper, we improve the calculation of currents in the atmosphere by solving the current density J directly from the current continuity equation ∇ • J = 0. The currents in the atmosphere can be solved for any arbitrary angle of magnetic field, i.e., any magnetic latitude. In addition, a large ratio (~10) of Hall to Pedersen conductivities is used to generate a large Hall electric field. The effects of atmospheric currents and electric fields on the ionosphere with lithosphere current source located at magnetic latitudes of 7.5°, 15°, 22.5°, and 30° are obtained. For upward (downward) atmospheric currents flowing into the ionosphere, the simulation results show that the westward (eastward) electric fields dominate. At magnetic latitude of 7.5° or 15°, the upward (downward) current causes the increase (decrease) of total electron content (TEC) near the source region, while the upward (downward) current causes the decrease (increase) of TEC at magnetic latitude of 22.5°or 30°. The dynamo current density required to generate the same amount of TEC variation in the improved model is found to be smaller by a factor of 30 as compared to that obtained in our earlier paper. We also calculate the ionosphere dynamics with imposed zonal westward and eastward electric field based on SAMI3 code. It is found that the eastward (westward) electric field may trigger one (two) plasma bubble(s) in the nighttime ionosphere. 其他題名： J. Geophys. Res. Space Physics 出版者： Washington: Blackwell Publishing Ltd 出版日期： 2014-04 出處： Journal of Geophysical Research: Space Physics, 2014-04, Vol.119 (4), p.3189-3205 資源來源： Wiley Online Library All Journals 版權： 2014. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 2169-9380 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/2013JA019392
Appears in Collections:	[DEPARTMENT OF SPACE SCIENCE AND ENGINEERING] journal & Dissertation

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