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Intensification of the Cowling current in the global MHD simulation model
Tang, B. B.; Wang, C.; Hu, Y. Q.; Kan, J. R.; Tang, BB (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2011
Volume116Pages:A06204
ISSN0148-0227
Language英语
AbstractWe examine the effects of the ionospheric conductance on the intensification of the westward electrojet current in the ionosphere based on the piecewise parabolic method with a Lagrangian remap (PPMLR) global MHD simulation model. The ionospheric conductance is empirically linked to the plasma pressure in the plasma sheet. The simulation results are consistent with observations: When the Pedersen and Hall conductances are small, the ionospheric current shows a two-cell pattern; when the conductances increase and the ratio Sigma(H)/Sigma(P) >= 2, an intense westward electrojet appears in the midnight sector. This intense westward electrojet is the Cowling current driven by the induced southward electric field due to the blockage of the northward Hall current from closure in the equatorial plasma sheet. The simulation shows the development of the Cowling electrojet is essential to the intensification of the westward electrojet in the ionosphere.; We examine the effects of the ionospheric conductance on the intensification of the westward electrojet current in the ionosphere based on the piecewise parabolic method with a Lagrangian remap (PPMLR) global MHD simulation model. The ionospheric conductance is empirically linked to the plasma pressure in the plasma sheet. The simulation results are consistent with observations: When the Pedersen and Hall conductances are small, the ionospheric current shows a two-cell pattern; when the conductances increase and the ratio Sigma(H)/Sigma(P) >= 2, an intense westward electrojet appears in the midnight sector. This intense westward electrojet is the Cowling current driven by the induced southward electric field due to the blockage of the northward Hall current from closure in the equatorial plasma sheet. The simulation shows the development of the Cowling electrojet is essential to the intensification of the westward electrojet in the ionosphere.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3148
Collection空间科学部
Corresponding AuthorTang, BB (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Tang, B. B.,Wang, C.,Hu, Y. Q.,et al. Intensification of the Cowling current in the global MHD simulation model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2011,116:A06204.
APA Tang, B. B.,Wang, C.,Hu, Y. Q.,Kan, J. R.,&Tang, BB .(2011).Intensification of the Cowling current in the global MHD simulation model.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,116,A06204.
MLA Tang, B. B.,et al."Intensification of the Cowling current in the global MHD simulation model".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 116(2011):A06204.
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