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Noël , J.-M. A.; St.-Maurice , J.-P.; Blelly , P.-L. (2005)
Publisher: European Geosciences Union
Journal: Annales Geophysicae
Languages: English
Types: Article
Subjects: Geophysics. Cosmic physics, Q, [ SDU.STU ] Sciences of the Universe [physics]/Earth Sciences, [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere, Science, Physics, QC1-999, QC801-809
International audience; We show that heating by large amplitude E-region plasma waves at high latitudes can at times substantially enhance the electro-dynamical response of the ionosphere. This is made manifest through an increase in parallel current densities and parallel electric fields generated at the edge of arcs in the E and lower F-region of the ionosphere, in response to sharp cutoffs in precipitation with an otherwise uniform differential energy flux. The enhancement is rooted in a reduction in electron recombination that occurs in response to higher electron temperatures triggered by the generation of strong electric fields near the edge of the arc. The reduced recombination rate, in turn, leads to enhanced conductivity gradients near the edge of the arc, which, in turn, drives more intense parallel currents and stronger local electric fields.

Keywords. Ionosphere (Electric fields and curents; Plasma temperature and density) – Space plasma physics (Numerical simulation studies)
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Albritton, D. L., Dotan, I., Lindinger, W., McFarland, M., Tellinghuisen, J., and Fehsenfeld, F. C.: Effects of ion speed distributions in flow-drift tube studies on ion-neutral reactions, J. Chem. Phys., 66, 410-421, 1977.
    • Blelly, P.-L. and Schunk, R. W.: A comparative study of the timedependent standard 8-, 13- and 16-moment transport formulations of the polar wind, Ann. Geophys., 11, 443-469, 1993.
    • Blelly, P.-L., Robineau, A., Lilensten, J., and Lummerzheim, D.: 8-moment fluid models of the terrestrial high latitude ionosphere between 100 and 3000 km, Solar terrestrial energy program (STEP): handbook of ionospheric models, 53-72, 1996. region, in: Polar cap Dynamics and High Latitudes turbulence: SPI Conference proceedings and Reprint series, No. 8, 1988, Scientific Publishers, Cambridge, Mass., 323-348, 1990a.
    • St.-Maurice, J.-P.: Electron heating by plasma waves in the high latitude E-region: Theory, in: Advances in Space Research, vol. 10, Pergamon Press 239-249, 1990b.
    • St.-Maurice, J.-P. and Hamza, A. M.: A new nonlinear approach to the theory of E region irregularities, J. Geophys. Res., 106, 1751-1759, 2001.
    • St.-Maurice, J.-P. and Hanson, W. B.: Ion frictional heating at high latitudes and its possible use for an in situ detemination of neutral thermospheric winds and temperatures, J. Geophys. Res., 87, 7580-7602, 1982.
    • St.-Maurice, J.-P. and Laher, R.: Are observed broadband plasma wave amplitudes large enough to explain the enhanced electron temperatures of the high-latitude E region?, J. Geophys. Res., 90, 2843-2850, 1985.
    • St.-Maurice, J.-P. and Laneville, P. J.: The reaction rate of O+ with O2, N2, and NO under highly disturbed auroral conditions., J. Geophys. Res., 103, 17 519-17 521, 1998.
    • St.-Maurice, J.-P. and Torr, D. G.: The effect of relative speed distributions on the reaction rates of O+ with N2, O2 and NO in the thermosphere, J. Geophys. Res., 83, 969-977, 1978.
    • St.-Maurice, J.-P., Kofman, W., and James, D.: In-situ generation of intense parallel fields in the lower ionosphere, J. Geophys. Res., 101, 335-356, 1996.
    • Wickwar, V. B., Lathuille`re, C., Kofman, W., and Lejeune, G.: Elevated electron temperatures in the auroral E layer measured with the chatanika radar, J. Geophys. Res., 86, 4721-4730, 1981.
    • Zhu, H., Otto, A., Lummerzheim, D., Rees, M. H., and Lanchester, G.: Ionosphere-magnetosphere simulation of small-scale structure and dynamics, J. Geophys. Res., 106, 1795-1806, 2001.
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