Abstract
The processes which couple the solar wind mass, energy and momentum to the magnetosphere are known to be strongly dependent on the orientation of the interplanetary magnetic field (IMF; e.g. [1, 2], and many others). When the IMF points south the predominant coupling process is believed to be reconnection between the interplanetary and terrestrial magnetic fields in the manner first proposed by Dungey [3]. Conversely, when the IMF points strongly north, other processes become important, maybe of a “viscous type” nature, such as Kelvin - Helmholtz instability, diffusion etc., but there is also the possibility of reconnection at neutral points poleward of the cusp, where the local rotation of the field across the magnetopause - the magnetic shear - is large.
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Sandholt, P.E., Farrugia, C.J., Moen, J., Lybekk, B. (1998). The Dayside Aurora and its Regulation by the Interplanetary Magnetic Field. In: Moen, J., Egeland, A., Lockwood, M. (eds) Polar Cap Boundary Phenomena. NATO ASI Series, vol 509. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5214-3_15
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DOI: https://doi.org/10.1007/978-94-011-5214-3_15
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