Abstract
Whilst it is well-accepted that short-duration changes to the Interplanetary Magnetic Field (IMF) and solar wind cause high-latitude ionospheric transients observed by magnetic, optical and radar techniques, a coherent explanation of the zoo of signatures remains illusive. The paper describes some of the problems involved in the interpretation of dayside transient features, all of which result from time-and spatially-varying field-aligned currents. A brief discussion of how internal magnetospheric processes can directly affect the rate at which energy is transferred across the magnetopause is discussed. Further progress will require carefully-coordinated measurements from ground-based networks of observatories with complementary measurements from space.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Araki, T. (1994) A physical model of the geomagnetic sudden commencement, in M. J. Engebretson, K. Takahasi and M. Scholer (eds.), Solar wind sources of magnetospheric ultra-low frequency waves, Geophysical Monograph 81, American Geophysical Union, Washington DC, USA.
Cowley, S.W.H. and Lockwood, M. (1992) Excitation and decay of solar-wind driven flows in the magnetosphere-ionosphere system, Ann. Geophys 10, 103.
Crooker, N. U. and Siscoe, G.L. (1990) On mapping flux transfer events to the ionosphere, J. Geophys. Res, 85, 3795.
Dungey, J. W. (1961) Interplanetary field and the auroral zones, Phys. Rev. Lett 6, 47.
Fenrich, F.R., Samson, J.C., Sofko, G., and Greenwald, R.A. (1995) ULF high-and low-m field line resonances observed with the Super Dual Auroral Radar Network, J. Geophys. Res,100, 21535.
Freeman, M.P. and Fanugia, C.J. (1998) Magnetopause motions in a Newton-Buseman approach, these proceedings.
Friis-Christensen, E., McHenry, M.A., Clauer, C.R., and Vennerstrom, S. (1988) Ionospheric travelling convection vortices observed near the polar cleft: A triggered response to sudden changes in the solar wind, Geophys. Res. Lett. 15, 253.
Fuselier, S. A., Shelley, E.G., and Lennnartson, O.W. (1997) Solar wind composition changes across the Earth’s magnetopause, J. Geophys. Res, 102, 275.
Goettz, C. K., Neilsen, E., Korth, A., Glassmeier, K.H., Haldoupis, C., Hoeg, P., and Hayward, D. (1985) Observations of a possible ground signature of flux transfer events, J. Geophys. Res,90, 4069.
Kan, J R. (1988) A theory of patchy and intermittent reconnections for magnetospheric flux transfer events, J. Geophys. Res, 93, 5613.
Lanzerotti, L. J., Wolfe, A., Trevedi, N., Maclennan, C.G., and Medford, L.V. (1990) Magnetic impulse events at high latitude: magnetopause and boundary layer plasma processes. J. Geophys. Res 95 97.
Lockwood, M. and Wild, M.N. (1993) On the quasi-periodic nature of flux transfer events, J.Geophys. Res, 98 5935.
Lockwood, M., Cowley, S.H.W., Sandholt, P.E., and Lepping, R.P. (1990) The ionospheric signatures of flux transfer events and solar wind dynamic pressure changes, J. Geophys. Res, 95 17113.
Lockwood, M., Denig, W.F., Farmer,A.D., Davda, V.N., Cowley, S.W.H., and Lühr, H. (1993) Ionospheric signatures of pulsed reconnection at the Earth’s magnetopause, Nature, 361 424.
Lockwood, M., Cowley, S.W.H., and Smith, M.F. (1994) Comment on “By fluctuations in the magnetosheath and azimuthal flow velocity transients in the dayside ionosphere” by Newell and Sibeck, Geophys. Res. Lett, 21 1819.
Lühr, H., Lockwood, M., Sandholt, P.E., Hansen, T.L. and T. Moretto. (1996) Multi-instrument ground-based observations of a traveling convection vortex event, Ann. Geophys, 14 162.
Lysak, R. L., Song, Y., and Lee, D.-H. (1994) Generation of ULF waves by fluctuations in the magnetopause position, in M. J. Engebretson, K. Takahasi and M. Scholer (eds.), Solar wind sources of magnetospheric ultra-low frequency waves,Geophysical Monograph 81, American Geophysical Union, Washington DC, USA.
McHenry, M. A. and Clauer, C.R. (1987) Modeled ground magnetic signatures of flux transfer events, J. Geophys. Res, 92 11231.
Minow, J. (1996) PhD Thesis, University of Alaska, USA.
Moen, J., Evans, D., Carlson, H.C., and Lockwood, M. (1996) Dayside moving auroral transients related to LLBL dynamics, Geophys. Res. Lett,23 3247.
Morrison, K. and Freeman, M. P. (1995) The role of upstream ULF waves in the generation of quasi-periodic ELF-VLF emissions. Ann. Geophys 13 1127.
Newell, P.T. and Sibeck, D.G. (1993) Upper limits on the contribution of FTEs to ionospheric convection,Geophys. Res. Lett, 20 2829.
Oierset, M., Lühr, H., Moen, J., Moretto, T., and Sandholt, D.E. (1996) Dynamical auroral morphology in relation to ionospheric plasma convection and geomagnetic activity: signatures of magnetopause x-line dynamics and flux transfer events, J. Geophys. Res, 101 13275.
Pinnock, M., Rodger, A.S., Dudeney, J.R., Baker, K.B., Greenwald, R.A., and Greenspan, M. (1993) Observations of an enhanced convection channel in the cusp ionosphere, J. Geophys. Res, 98 3767.
Pinnock, M., Rodger, A.S, Dudeney, J.R., Greenwald, RA, Baker, K.B., and Ruohoniemi, J.M. (1991) An ionospheric signature of possible enhanced field merging on the dayside magnetopause, J. Atmos. Terr. Phys, 53 201.
Pinnock, M., Rodger, A.S., Dudeney, J.R., Rich, F.,and Baker, k. (1995) High spatial and temporal observations of the ionospheric cusp, Ann. Geophys 13 919.
Rijnbeck, R. P., Cowley, S.W.H., Southwood, D.J., and Russell, C.T. (1984) A survey of dayside flux transfer events observed by the ISEE 1 and 2 magnetometers, J.Geophys. Res, 89 786.
Rodger A. S. and Pinnock, M. (1997) The ionospheric response to flux transfer events - the first few minutes, Ann. Geophys 15 685–691.
Samson, J.C., Wallis, D. D., Hughes, T.J., Creutzberg, F., Ruohoniemi J.M., and Greenwald, R.A. (1992) Substorm intensifications and field line resonances in the nightside magnetosphere, J. Geophys. Res, 97 8495.
Sandholt,P.E., Lockwood, M., Lybbek,B., and Farmer, A.D. (1990) Auroral bright spot sequence near 1400 MLT: Co-ordinated optical and ion drift observations, J.Geophys. Res, 95 21095.
Sandholt, P. E., and 13 other authors. (1994) Cusp/cleft auroral activity in relation to solar wind pressure and interplanetary magnetic field Bz and By, J. Geophys. Res, 99 17323.
Smith, M. P. and Lockwood, M. (1996) Earth’s magnetospheric cusps, Rev. Geophys, 34 233.
Song, P. (1994) Observations of waves at the dayside magnetopause, in M. J. Engebretson, K. Takahasi and M. Scholer, (eds.), Solar wind sources of magnetospheric ultra-low frequency waves, Geophysical Monograph 81, American Geophysical Union, Washington DC, USA.
Southwood, D. J. (1987) The ionospheric signature of flux transfer events, J. Geophys. Res, 92 3207.
Yahnin, A. G., and Moretto, T. (1996) Travelling convection vortices in the ionosphere map to the central plasma sheet, Ann. Geophys, 14 1025.
Zesta, E. (1997) Traveling convection vortices at cusp latitudes observed by the Magnetometer Array for Cusp and Cleft Studies, PhD Thesis, Boston University, 1997.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Rodger, A.S. (1998). Ionospheric Signatures of Magnetopause Processes. In: Moen, J., Egeland, A., Lockwood, M. (eds) Polar Cap Boundary Phenomena. NATO ASI Series, vol 509. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5214-3_10
Download citation
DOI: https://doi.org/10.1007/978-94-011-5214-3_10
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6195-7
Online ISBN: 978-94-011-5214-3
eBook Packages: Springer Book Archive