Skip to main content
Article thumbnail
Location of Repository

Evolution of Kelvin-Helmholtz activity on the dusk\ud flank magnetopause

By C. (Claire) Foullon, C. J. (Charles John) Farrugia, A. N. Fazakerley, C. J. (Christopher J.) Owen, F. T. Gratton and Roy Banks Torbert


Our purpose is to characterize the evolution of the magnetopause Kelvin-Helmholtz\ud (KH) wave activity with changes in thickness of the adjacent boundary layer,\ud geomagnetic latitude and interplanetary magnetic field (IMF) orientation. As the IMF\ud turns northward, wave activity may be generated at the dayside before propagating\ud down the tail, where the boundary layer is expected to support longer wavelengths. We\ud use two-point observations on the dusk magnetopause at low latitudes, from Geotail on\ud the dayside and Cluster tailward of the dusk terminator. We quantify the wavelength,\ud power, wavefront steepness and propagation direction at Cluster. An estimate of the\ud thickness of the low-latitude boundary layer (LLBL) is obtained by correlating normal\ud distances to the magnetopause, derived from two empirical solar-wind-driven models,\ud with a systematic relationship (the "transition parameter") found between the electron\ud number density and temperature; the correlation factor is used to infer the temporal\ud evolution of the thickness of the locally sampled layer. We find that wavelengths are\ud controlled by the IMF clock angle, as expected when generated by the KH mechanism\ud at the dayside, although amplitudes, wavefront steepness and propagation directions are\ud more closely correlated with the layer thickness. A survey of parameter space provides\ud evidence of the contribution of the KH mechanism to the widening of the electron LLBL

Topics: QB
Publisher: American Geophysical Union
Year: 2008
OAI identifier:

Suggested articles


  1. (1990). A 154 day periodicity in the occurrence rate of proton flares, doi
  2. (2002). A model of the formation of the low-latitude boundary layer for northward IMF by reconnection: A summary and review, doi
  3. (1997). A new functional form to study the solar wind control of the magnetopause size and shape, doi
  4. (1998). A practical guide to wavelet analysis, doi
  5. (1986). A prescription for period analysis of unevenly sampled time series, doi
  6. (1999). A quantitative test of the self-organization hypothesis of the magnetopause Kelvin-Helmholtz instability as an inverse problem, doi
  7. (1987). An extended study of the low-latitude boundary layer on the dawn and dusk flanks of the magnetosphere, doi
  8. (1994). Anomalous ion mixing within an MHD scale Kelvin-Helmholtz vortex, doi
  9. (1984). Anomalous transport by magnetohydrodynamic KelvinHelmholtz instabilities in the solar wind-magnetosphere interaction, doi
  10. (2002). Astronomical Image and Data Analysis, Astron. and Astrophys. doi
  11. (1998). C o m a s ,D .J . ,S .J .B a m e ,P .B a r k e r ,W .C .F e l d m a n ,J .L .P h i l l i p s doi
  12. (1998). Charts of joint KelvinHelmholtz and Rayleigh-Taylor instabilities at the dayside magnetopause for strongly northward interplanetary magnetic field, doi
  13. (2004). Cluster observations of surface waves on the dawn flank magnetopause, doi
  14. (2000). Coordinated wind, interball/tail, and ground observations of Kelvin-Helmholtz waves at the near-tail, equatorial magnetopause at dusk: doi
  15. (1995). Dependence of the magnetopause Kelvin-Helmholtz instability on the orientation of the magnetosheath magnetic field, doi
  16. (2004). Detection of ultralong-period oscillations in an EUV filament, doi
  17. (1995). Diffusion processes: An observational perspective, doi
  18. (1992). Exploring the magnetospheric boundary layer, doi
  19. (2001). First multispacecraft ion measurements in and near the Earth’s magnetosphere with the identical Cluster ion spectrometry (CIS) experiment,
  20. (2001). First results of electric field and density observations by Cluster EFW based on initial months of operation, doi
  21. (2002). Flow in the magnetosheath: doi
  22. (1979). Geomagnetopause surface fluctuations observed by Voyager 1, doi
  23. (2000). Geotail observations of the Kelvin-Helmholtz instability at the equatorial magnetotail boundary for parallel northward fields, doi
  24. (2004). Global shape of the magnetotail current sheet as derived from Geotail and Polar data, doi
  25. (1997). How the magnetopause transition parameter works, doi
  26. (1961). Hydrodynamic and Hydromagnetic Stability, doi
  27. (1964). Hydromagnetic stability of the magnetospheric boundary, doi
  28. (1961). Interplanetary magnetic field and the auroral zones, doi
  29. (1995). Introduction to Statistical Time Series, doi
  30. (1979). ISEE-1 and 2 magnetometer observations of the magnetopause, in doi
  31. (1986). Kelvin-Helmholtz instability at the magnetopause boundary, doi
  32. (2000). Kelvin-Helmholtz instability at the magnetotail boundary: MHD simulation and comparison with Geotail observations, doi
  33. (1993). Kinetic simulations of the KelvinHelmholtz instability at the magnetopause, doi
  34. (1997). Low-latitude dusk flank magnetosheath, magnetopause, and boundary layer for low magnetic shear: Wind observations, doi
  35. (1985). Magnetic field draping against the dayside magnetopause, doi
  36. (1993). Magnetopause shape as a bivariate function of interplanetary magnetic field Bz and solar wind dynamic pressure, doi
  37. (1981). Magnetospheric ULF waves: A tutorial with a historical perspective, in Solar Wind Sources of Magnetospheric UltraLow-Frequency Waves, doi
  38. (1983). Multiple spacecraft observations of interplanetary shocks: Four spacecraft determination of shock normals, doi
  39. (1982). Nonlocal stability analysis of the MHD Kelvin-Helmholtz instability in a compressible plasma, doi
  40. (2005). On the formation of the high-altitude stagnant cusp: Cluster observations, doi
  41. (1997). Peace: A plasma electron and current experiment, doi
  42. (1990). Re-ordered electron data in the low-latitude boundary layer, doi
  43. (1999). Self-organization in the two-dimensional magnetohydrodynamic transverse Kelvin-Helmholtz instability, doi
  44. (1998). Shock and Discontinuity Normals, Mach Numbers, and Related Parameters, in Analysis Methods for Multi-Spacecraft Data, edited by
  45. (1992). Slow mode transition in the frontside magnetosheath, doi
  46. (1997). Solar wind control of density and temperature in the near-Earth plasma sheet: WIND/GEOTAIL collaboration, doi
  47. (2005). Solar wind spatial scales in and comparisons of hourly Wind and ACE plasma and magnetic field data, doi
  48. (2002). Spatial and temporal variations of the cold dense plasma sheet: Evidence for a low-latitude boundary layer source?, doi
  49. (1982). Studies in astronomical time series analysis. II: Statistical aspects of spectral analysis of unevenly spaced data, doi
  50. (2001). The Cluster magnetic field investigation: Overview of in-flight performance and initial results, doi
  51. (1994). The comprehensive plasma instrumentation (CPI) for the Geotail spacecraft, doi
  52. (2005). The Earth’s magnetopause: Reconstruction of motion and structure, doi
  53. (1994). The Geotail magnetic field investigation, doi
  54. (1981). The Kelvin-Helmholtz instability in the lowlatitude boundary layer, doi
  55. (2006). The KH stability of the supersonic magnetopause flanks modeled by continuous profiles for the transition,
  56. (1995). The magnetopause: Surface waves and instabilities and their possible dynamical consequences, doi
  57. (1976). The magnetospheric boundary layer: Site of plasma, momentum and energy transfer from the magnetosheath into the magnetosphere, doi
  58. (1967). The ordered magnetic field of the magnetosheath, doi
  59. (1993). The spatial development of the low-latitude boundary layer, doi
  60. (2005). The structure of the magnetospheric boundary layers and the magnetospheric turbulence, doi
  61. (2004). Transport of solar wind into Earth’s magnetosphere through rolled-up Kelvin-Helmholtz vortices, doi
  62. (2001). Viscous-type processes in the solar wind-magnetosphere interaction,
  63. (2005). X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations, doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.