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Detailed Reference Information |
Gondarenko, N.A., Guzdar, P.N., Sojka, J.J. and David, M. (2003). Structuring of high latitude plasma patches with variable drive. Geophysical Research Letters 30: doi: 10.1029/2002GL016437. issn: 0094-8276. |
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Three-dimensional nonlinear simulations of the structuring of high-latitude patches with variable drive demonstrate the role of the gradient drift instability as the primary operative structuring mechanism. In this letter we show that by introducing a variable convective E ¿ B drive obtained from the ionosphere module of a global MHD code simulation of a real substorm <Sojka et al., 1997>, the nature of the structuring is strongly influenced by the drive. In fact, due to occasional reversal of the direction of the convection, the structuring from the gradient-drift instability takes place on both edges of the patch. Using different ion-neutral collisionality to account for the seasonal or solar cycle variability of the ionosphere, the four categories of structured patches identified by Kivan¿ and Heelis <1997> have been simulated. |
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Abstract |
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Keywords
Ionosphere, Ionospheric irregularities, Ionosphere, Ionospheric dynamics, Ionosphere, Plasma convection, Ionosphere, Auroral ionosphere, Ionosphere, Ionospheric disturbances |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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