World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Diffusion at the Earth Magnetopause: Enhancement by Kelvin-helmholtz Instability : Volume 25, Issue 1 (01/02/2007)

By Smets, R.

Click here to view

Book Id: WPLBN0004001632
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Diffusion at the Earth Magnetopause: Enhancement by Kelvin-helmholtz Instability : Volume 25, Issue 1 (01/02/2007)  
Author: Smets, R.
Volume: Vol. 25, Issue 1
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Rezeau, L., Delcourt, D., Smets, R., & Belmont, G. (2007). Diffusion at the Earth Magnetopause: Enhancement by Kelvin-helmholtz Instability : Volume 25, Issue 1 (01/02/2007). Retrieved from

Description: CETP/CNRS/UVSQ/UPMC/IPSL, 10–12 Avenue de l'Europe, 78140 Vélizy, France. Using hybrid simulations, we examine how particles can diffuse across the Earth's magnetopause because of finite Larmor radius effects. We focus on tangential discontinuities and consider a reversal of the magnetic field that closely models the magnetopause under southward interplanetary magnetic field. When the Larmor radius is on the order of the field reversal thickness, we show that particles can cross the discontinuity. We also show that with a realistic initial shear flow, a Kelvin-Helmholtz instability develops that increases the efficiency of the crossing process. We investigate the distribution functions of the transmitted ions and demonstrate that they are structured according to a D-shape. It accordingly appears that magnetic reconnection at the magnetopause is not the only process that leads to such specific distribution functions. A simple analytical model that describes the built-up of these functions is proposed.

Diffusion at the Earth magnetopause: enhancement by Kelvin-Helmholtz instability

Belmont, G. and Chanteur, G.: Advances in magnetopause Kelvin-Helmholtz instability studies, Phys. Scripta, 40, 124–128, 1989.; Büchner, J. and Zelenyi, L. M.: Regular and chaotic charged particle motion in magnetotaillike field reversal 1. Basic theory of trapped motion, J. Geophys. Res., 94, 11 821–11 842, 1989.; Chandrasekhar, S.: Hydrodynamic and hydromagnetic stability, Dover Publication, New York, 1961.; Channell, P. J.: Exact Vlasov-Maxwell equilibria with sheared magnetic fields, Phys. Fluids, 19, 1541–1545, 1976.; Dungey, J. W.: Interplanetary magnetic field and the auroral zone, Phys. Rev. Lett., 6, 47–48, 1961.; Cowley, S. W. H. and Shull Jr., P.: Current sheet acceleration of ions in the geomagnetic tail and the properties of ions bursts observed at the lunar distance, Planet. Space Sci., 31, 235–245, 1983.; Eastman T. E., Fuselier, S. A., and Gosling, J. T.: Magnetopause crossing without a boundary layer, J. Geophys. Res., 101, 49–57, 1996.; Frisch, U.: Turbulence, Cambridge University Press, 296 pages, 1995.; Fujimoto, F. and Terasawa, T.: Anomalous ion mixing within and MHD scale Kelvin-Helmholtz vortex, J. Geophys. Res., 99, 8601–8613, 1994.; Ganguli, G.: Stability of an inhomogeneous transverse plasma flow, Phys. PLasmas, 4, 1544–1551, 1997.; Hasegawa, H., Fujimoto, M., Phan, T.-D., Rème, H., Balogh, A., Dunlop, M. W., Hashimoto, C., and TanDokoro, R.: Transport of solar wind into Earth's magnetosphere through rolled-up Kelvin-Helmholtz vortices, Nature, 430, 755–758, 2004.; Huba, J. D.: The Kelvin-Helmholtz instability: Finite Larmor radius magnetohydrodynamics, Geophys. Res. Lett., 23, 2907–2910, 1996.; Lee. L. C. and Kan, J. R.: A unified model of the tangential magnetopause structure, J. Geophys. Res., 84, 6417–6426, 1979.; Matsumoto, Y. and Hoshino, M.: Onset of turbulence induced by a Kelvin-Helmholtz vortex, Geophys. Res. Lett., 31, L028071–L028074, 2004.; Miura, A. and Pritchett, P. L.: Nonlocal stability analysis of the MHD Kelvin-Helmholtz instability in a compressible plasma, J. Geophys. Res., 87, 7431–7444, 1982.; Romero, H. and Ganguli, G.: Nonlinear evolution of a strongly sheared cross-field plasma flow, Phys. Fluids, 5, 3163–3181, 1993.; Romero, H. and Ganguli, G.: Relaxation of the stressedd plasma sheet boundary layer, Geophys. Res. Lett., 21, 645–648, 1994.; Miura, A.: Anomalous transport by magnetohydrodynamic Kelvin-Helmholtz instabilities in the solar wind-magnetosphere interaction, J. Geophys. Res., 89, 801–818, 1984.; Miura, A.: Simulation of the Kelvin-Helmholtz instability at the magnetospheric boundary, J. Geophys. Res., 92, 3195–3206, 1987.; Mottez, F.: Exact nonlinear analytic Vlasov-Maxwell tangential equilibria with arbitrary density and temperature profiles, Phys. Plasmas, 10, 2501–2508, 2003.; Nakamura, T. K. M., Hayashi, D., and Fujimoto, M.: Decay of MHD-scale Kelvin-Helmholtz vortices mediated by parasitic electron dynamics, Phys. Rev. Lett., 92, 145001-1–145001-4, 2004.; Nykiri, K. and Otto, A.: Plasma transport at the magnetospheric boundary due to reconnection in Kelvin-Helmholtz vortices, Geophys. Res. Lett., 28, 3565–3568, 2001.; Papamastorakis, I., Paschmann, G., Sckopke, N., Bame, S. J., and Berchem, J.: The magnetopause as a Tangential discontinuity for large field rotation angles, J. Geophys. Res., 89, 127–135,1984.; Paschmann, G., Sckopke, N., Haerendel, G., Papamastorakis, J., Bame, S. J., Asbridge, J. R., Gosling, T. J., Hones Jr., E. W., and Tech, E. R.: ISEE plasma observations near the subsolar magnetopause, Space Sci. Rev., 22, 717–737, 1978.; Paschmann, G., Sonnerup, B. U. O., Papamastorakis, I., Sckopke, N., Hearendel, G., Bame, S. J., Asbridge, J. R., Gosling, J. T., Russell, C. T., and Elphic, R. C.: Plasma acceleration at the Earth's mag


Click To View

Additional Books

  • Circulation Changes in the Winter Lower ... (by )
  • The Pc Index: Review of Methods : Volume... (by )
  • Meridional Thermospheric Neutral Wind at... (by )
  • Profile of a Low-mach-number Shock in Tw... (by )
  • Bistatic Observations of Large and Small... (by )
  • Global Auroral Conductance Distribution ... (by )
  • Storm-time Longitudinally Propagating As... (by )
  • Effects of Mixed Scatter on Superdarn Co... (by )
  • Pc3-4 Ulf Waves Observed by the Superdar... (by )
  • Seasonal Variation of Gravity Waves in t... (by )
  • A Numerical Study of Two Interacting Cor... (by )
  • Identification of Slow Magnetosonic Wave... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.