磁层顶三维数值模型

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1、Abstractthecoefficient(ao，a2；bo，b2)isirrelevantto(pandjustthefunctionwiththevariablesofthesolarwindconditions，wecanknowthefunctionformof(ao，a2；bo，b2)basedonthefunctionformof(ro，仅)intheShue97model：—上ao=(Col+c02Bz)DPc。3—上a2=(c21+C22Bz)DP。23bo=d01+dozBz+dosDp+d04BzDPb2=d21+d22Bz+d2

2、3DP+d24BzDPNowwehavegottena3-Dmodelofthemagnetopause，withthemodelwecancalculatethe3-Dshapeofthemagnetopauseunderanysolarwindconditions．WeCanobtaintherelationshipbetweentheconfigurationparameters(ro，∞ofthemagnetopauseintheequatorialplaneandthesolarwindconditions(Bz，DP)accordingto

3、thismodel．WefindwhenBzisnorthwardincreasing，roincreasesalittleand仅decreases；whenBzissouthwardincreasing，rodecreasesalittleand仅decreases．WhenDpisincreasing，r0decreasessharply，roandDparerelmedbyapowerfunctionalrelation，仅remainvirtuallyunchanged．Magneticfieldchieflyaffecttheshapeof

4、themagnetopause，dynamicpressurechieflyaffectthesizeofthemagnetopause．Theshapeofthemagnetopauseintheequatorialplanechangesverylittlewiththesolarwindconditionsinaggregate，whichmeansthemagnetopauseintheequatorialplaneisstrongself-similar．WeCanobtaintherelationshipbetweentheconfigur

5、ationparameter(ro，∞ofthemagnetopauseinthemeridianplaneandthesolarwindconditions(Bz，DP)accordingtothismodel．WefindwhenBzisnorthwardincreasing，roincreasesalittleand仅decreases；whenBzissouthwardincreasing，rodecreasesalittleandaincreases．WhenDpisincreasing，rodecreasessharply，roandDPa

6、rerelatedbyapowerfunctionalrelation，仅remainvirtuallyunchanged．Magneticfieldchieflyaffecttheshapeofthemagnetopause，dynamicpressurechieflyaffectthesizeoftheIVAbstractmagnetopause．Whensolarwindconditionsarechanging，theshapeofthemagnetopauseinthemeridianplanechangeslargerthantheshap

7、eofthemagnetopauseintheequatorialplane．Themagnetopauseinthemeridianplaneisdividedintotwostagesbecauseoftheexistenceofthecusp，butinthismodelwestillfitwithjustonecurve，sotheerrorislarger．UndereverysolarwindconditionthismodelfitglobalMHDdatawell．When13zisnorthwardthismodelfitempiri

8、calmodelswell，whenBzissouthwardthismodeldonotfi