A numerical model of the effects of time-varying reconnection - I: Ionospheric convection
Lockwood, M. and Morley, S.K. (2004) A numerical model of the effects of time-varying reconnection - I: Ionospheric convection. Annales Geophysicae, 22, 73-91.
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This paper presents a numerical model for predicting the evolution of the pattern of ionospheric convection in response to general time-dependent magnetic reconnection at the dayside magnetopause and in the cross-tail current sheet of the geomagnetic tail. The model quantifies the concepts of ionospheric flow excitation by Cowley and Lockwood (1992), assuming a uniform spatial distribution of ionospheric conductivity. The model is demonstrated using an example in which travelling reconnection pulses commence near noon and then move across the dayside magnetopause towards both dawn and dusk. Two such pulses, 8min apart, are used and each causes the reconnection to be active for 1min at every MLT that they pass over. This example demonstrates how the convection response to a given change in the interplanetary magnetic field (via the reconnection rate) depends on the previous reconnection history. The causes of this effect are explained. The inherent assumptions and the potential applications of the model are discussed. Ionosphere (ionosphere-magnetosphere interactions; plasma convection) - Magnetospheric physics (magnetosphere-ionosphere interactions; solar wind-magnetosphere interactions)
|Subjects:||Q Science > QB Astronomy|
|Divisions:||University Structure - Pre August 2011 > School of Physics and Astronomy > Astronomy and Space Science
|Date Deposited:||24 Sep 2004|
|Last Modified:||02 Mar 2012 13:03|
|Contributors:||Lockwood, M. (Author)
Morley, S.K. (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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