Global disturbance currents in the ionosphere during storms

doi:10.1016/j.jastp.2005.11.006

CORC > 北京大学 > 地球与空间科学学院

	Global disturbance currents in the ionosphere during storms
	Shen, CS ; Zi, MY ; Wang, JS ; Xu, JY ; Liu, SL
刊名	journal of atmospheric and solar terrestrial physics
	2006
关键词	magnetic storm disturbance current system ionospheric dynamo thermospheric wind electric conductivity driving electric field at the polar cap boundary MODEL DYNAMO FIELD
DOI	10.1016/j.jastp.2005.11.006
英文摘要	The thermospheric neutral wind and ionospheric layer conductance at latitudes higher than 45 degrees (provided from empirical models), as well as the conductivities caused by solar irradiation (deduced from model parameters: neutral temperature, concentration and electron density) are used to calculate the distribution of the electrostatic potential, current and electric field between geomagnetic latitude +/- 72 degrees and 0-24h MLT in terms of the ionospheric current continuity equation, on June- and December-solstices during strong storms. The driving electric field across the polar cap and the region 2 field-aligned current, caused by the magnetospheric coupling, are taken into account in the calculation. The results represent the complexities and varieties about the coupling between disturbances of the magnetosphere, the thermospheric wind and the distribution of ionospheric conductance. The penetration of disturbed currents from the auroral zone to midand low-latitude area is often asymmetrical between the southern and northern hemispheres. Both the intensification of the eastward equatorial electrojet on the day side at the beginning of a storm, and later, the appearance of the westward equatorjet after noon, can be found frequently during storm periods. In the moderate high latitude areas the existence of a eastward electric field in the midnight-dawn region is an expected mechanism, which can be used to explain phenomena found many times in our previous works, due to its E x B upper-ward drift effect. (c) 2005 Elsevier Ltd. All rights reserved.; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; SCI(E); EI; 1; ARTICLE; 7; 793-802; 68
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/252529]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Shen, CS,Zi, MY,Wang, JS,et al. Global disturbance currents in the ionosphere during storms[J]. journal of atmospheric and solar terrestrial physics,2006.
APA	Shen, CS,Zi, MY,Wang, JS,Xu, JY,&Liu, SL.(2006).Global disturbance currents in the ionosphere during storms.journal of atmospheric and solar terrestrial physics.
MLA	Shen, CS,et al."Global disturbance currents in the ionosphere during storms".journal of atmospheric and solar terrestrial physics (2006).