On the quasi-periodic nature of magnetopause flux transfer events

Article English OPEN
Lockwood, Mike ; Wild, M. N. (1993)

The recurrence rate of flux transfer events (FTEs) observed near the dayside magnetopause is discussed. A survey of magnetopause observations by the ISEE satellites shows that the distribution of the intervals between FTE signatures has a mode value of 3 min, but is highly skewed, having upper and lower decile values of 1.5 min and 18.5 min, respectively. The mean value is found to be 8 min, consistent with previous surveys of magnetopause data. The recurrence of quasi-periodic events in the dayside auroral ionosphere is frequently used as evidence for an association with magnetopause FTEs, and the distribution of their repetition intervals should be matched to that presented here if such an association is to be confirmed. A survey of 1 year's 15-s data on the interplanetary magnetic field (IMF) suggests that the derived distribution could arise from fluctuations in the IMF Bz component, rather than from a natural oscillation frequency of the magnetosphere-ionosphere system.
  • References (5)

    HaerendelG,., G. PaschmannN,. SckopkeH,. Rosenbauear,nd P. C. ScholerM,., Magneticflux transferat themagnetopau sIKese,donsingle HedgecockT,hefrontsideboundarylayerof themagnetopauasned X-line burstyreconnectionG, eophysR.es.Lett., 15, 291-294, 1988. theproblemof reconnectioJn., GeophysR. es.,83, 3195-3216,1978. Seinenov,V. S., I. V. Kubyshkin,V. V. Lebedeva,M. V. Sidneva,H. K.

    Lockwood,M., Flux transfereventsat the daysidemagnetopause: Biemat, M. F. He}m, B. P. Besserand R. P. Rijnbeek, TimeTransienrteconnectioonrmagnetosheaptrhessurpeulses?J,.Geophys. dependenltocalizedreconnectionof skewedmagneticfields, J. Res.,96, 5497-5509, 1991. GeophysR.es.,97, 4251-4263,1992.

    LockwoodM,., andS. W. H. Cowley,Ionosphericconvectioanndthe SouthwoodD, . $., The ionospheriscignatureof flux transfereventsJ,. substormcycle,in Substorm1s,Eur. SpaceAgencySpec.Publ.,ESA GeophysR.es.,92, 3207-3213,1987. SP-335, 99-109, 1992. SouthwoodD,. $., M. A. SaundersM,. W. Dunlop,W. A. C. MierLockwood, M., P. E. Sandholt,S. W. H. Cowley and T. Oguti, $edrzejowicza,nd R. P. Rijnbeek, A surveyof flux transferevents Interplanetarmy agneticfield controlof daysideauroralactivityand recordedby UKS spacecrafmtagnetometePr,lanet.SpaceSci.,34, thetransferof momentumacrossthedaysidemagnetopausPel,anet. 1349-1359, 1986. SpaceSci.,37, 1347-1365,1989. SouthwoodD,. $., C. $. Farrugia,and M. A. Saunders,What are flux Lockwood,M., S. W. H. Cowley, and P. E. Sandholt,Transient transferevents?P,lanet.SpaceSci.,36, 503-508, 1988. reconnectio-nthesearchforionospheriscignatureEso,s,Tram.AGU, Todd,H., S. W. H. Cowley,A. Etemadi,B. $.I. BromageM,. Lockwood, 71 (20), 709-720, 1990a. D. M. Willis and H. Lfihr, Flow in the high-latitud eionosphere: LockwoodM,., S. W. H. Cowley,P. E. Sandholta,ndR. P. LeppingT,he measurementast 15-secondresolutionmade using the EISCAT ionospheriscignatureosf fluxtransfeerventsandsolarwinddynamic "POLAR"experimentJ,. Atmos.Terr.Phys.,50, 423-446,1988. pressurcehangesJ,. GeophysR. es.,95, 17113-171351,990b.

    PaschmannG, ., Plasmaand Particleobservationast the magnetopause: M. Lockwood and M. N. Wild, World Data Centre C1 for Solarimplicationfsorreconnectioin,MagneticReconnecti oinnSpaceand TerrestrialPhysics,RutherfordAppletonLaboratory,SpaceScience LaboratoryPlasmasG,eophysM.onogr.Set.,vol. 30, editedby E.W. DepartmenCt,hilton,Didcot,Oxon.OX11 0QX, EnglandU,.K. Hones,Jr.,pp. 114-123,AGU, WashingtoDn.C., 1984.

    PaschmanGn,., G. HaerendelI,. PapamastorakNis.,SckopkeS, . $.Bame, $. T. Gosling, and C.T. Russell, Plasma and magneticfield (ReceivedApril 9, 1992; characteristicosf magneticflux transfereventsJ,. GeophysR. es.,87, revisedSeptembe2r8, 1992; 2159-2168, 1982. acceptedSeptembe2r8, 1992.)

  • Metrics
    0
    views in OpenAIRE
    0
    views in local repository
    5
    downloads in local repository

    The information is available from the following content providers:

    From Number Of Views Number Of Downloads
    Central Archive at the University of Reading - IRUS-UK 0 5
Share - Bookmark