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1、ARTICLEINPRESSPlanetaryandSpaceScience58(2010)1215–1229ContentslistsavailableatScienceDirectPlanetaryandSpaceSciencejournalhomepage:www.elsevier.com/locate/pssTheanalyticpropertiesoftheflappingcurrentsheetsintheearthmagnetotaila,b,nbcabZ.J.Rong,C.Shen,A.A.Petrukovich,W.X.Wan,Z.X.LiuaBeijingN
2、ationalObservatoryofSpaceEnvironment,InstituteofGeologyandGeophysics,ChineseAcademyofSciences,Beijing100029,ChinabStateKeyLaboratoryofSpaceWeather,CenterforSpaceScienceandAppliedResearch,ChineseAcademyofSciences,Beijing100190,ChinacSpaceResearchInstitute,84/32Profsoyuznayast.,Moscow117997,R
3、ussiaarticleinfoabstractArticlehistory:ThecurrentsheetinEarth’smagnetotailoftenflaps,andtheflappingwavescouldbeinducedReceived1December2009propagatingtowardsthedawnandduskflanks,whichcouldmakethecurrentsheetdynamic.ToReceivedinrevisedformexplorethedynamiccharacteristicsofcurrentsheetassociated
4、withtheflappingmotionholistically18April2010andprovidereasonablephysicalinterpretations,detaileddirectcalculationandanalysishavebeenAccepted20April2010appliedtooneapproximateanalyticmodelofmagneticfieldintheflappingcurrentsheet.ThemainAvailableonline28April2010resultsfromthemodeldemonstrate:(1
5、)themagneticfluctuationamplitudeisattenuatedfromtheKeywords:centerofcurrentsheettotheloberegions;ThelargerwaveamplitudewouldinducethelargerMagnetotailmagneticamplitude;(2)thecurvatureofmagneticfieldlines(MFLs),withmaximumatthecenterofMagneticgeometricalstructurecurrentsheet,isonlydependentont
6、hedisplacementZalongthesouth–northdirectionfromthecenterFlappingcurrentsheetofcurrentsheet,regardlessofthetiltofcurrentsheet;(3)thehalf-thicknessofneutralsheet,h,theTiltedcurrentsheetNeutralsheetminimumcurvatureradiusofMFLs,Rcmin,andthetiltangleofcurrentsheet,d,satisfiesh¼Rcmincosd;(4)thegra
7、dientofmagneticstrengthformsadouble-peakprofile,andthepeakvaluewouldbemoreintenseifthelocalcurrentsheetismoretilted;(5)currentdensityjanditsjy,jzcomponentsreachtheextremumatthecenterofCS.jandjzwouldbemoreintenseifthelocalcurrentsheetismoretilted,butitisno
