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IMF By-controlled field-aligned currents in the magnetotail during northward interplanetary magnetic field
Z.W.Cheng; J.K.Shi; M.Dunlop; Z.X.Liu; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJournal of Atmospheric and Solar-Terrestrial Physics
2013
ISSN1364-6826
Language英语
KeywordField-aligned Currents Magnetotail Interplanetary Magnetic Field By
AbstractThe influence oftheinterplanetarymagnetic field (IMF) By component onthe field-aligned currents (FACs)intheplasmasheetboundarylayer(PSBL)inthemagnetotailduringthenorthwardIMFwere investigatedusingthedatafromCluster.Thereare748FACscasesselectedtodoanalysis.Wepresent that theIMF By component playsaveryimportantroleincontrollingthe flowdirectionoftheFACsinthe PSBL inthemagnetotail.Inthenorthernhemisphere,theinfluence ofthepositive(negative)IMF By is an earthward(tailward)FACs.Tothecontrary,inthesouthernhemisphere,theeffectofthepositive (negative)IMF By is atailward(earthward)FACs.Thereisaclearnorth–south asymmetryofthepolarity of theFACsinthePSBLwhenIMF By is positiveornegative,andthisasymmetryofthepolarityismore distinct whenIMF By is positive.TheFACdensityiscontrolledbyIMF By only when |IMF By| is large.When |IMF By| is morethan10nTtheabsoluteFACdensityinthePSBLhasanobviouspositivecorrelationwith the |IMF By|. When |IMF By| is lessthan10nT,thereisnocorrelationbetweentheabsoluteFACdensityand |IMF By|. Thereisacleardusk–dawnasymmetryinthecurrentdensitiesfortheFACsinthePSBL,withthe dawncurrentsappearinglargerthantheduskcurrents.TheFACwiththelargest(smallest)densityis located intherangeof0100rMLTo0200(2100rMLTo2200).
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/122/1516
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Z.W.Cheng,J.K.Shi,M.Dunlop,et al. IMF By-controlled field-aligned currents in the magnetotail during northward interplanetary magnetic field[J]. Journal of Atmospheric and Solar-Terrestrial Physics,2013.
APA Z.W.Cheng,J.K.Shi,M.Dunlop,Z.X.Liu,&北京8701信箱.(2013).IMF By-controlled field-aligned currents in the magnetotail during northward interplanetary magnetic field.Journal of Atmospheric and Solar-Terrestrial Physics.
MLA Z.W.Cheng,et al."IMF By-controlled field-aligned currents in the magnetotail during northward interplanetary magnetic field".Journal of Atmospheric and Solar-Terrestrial Physics (2013).
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