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Abstract
How and where momentum is transferred from the solar wind to the magnetosphere and ionosphere is one of the key problems of space physics. Much of this transfer occurs through direct reconnection on the dayside, particularly when the IMF is southward. However, momentum transfer also occurs at higher latitudes via Alfvén waves on old open field lines, even for southward IMF. This momentum is transferred to the ionosphere via field-aligned currents (FACs), and the flow channel associated with these FACs produces a Hall current which causes magnetic variations at high latitude (the Svalgaard-Mansurov effect). We show examples where such momentum transfer is observed with multiple spacecraft and ground-based instruments.
Publication Date
8-13-2008
Journal Title
Annales Geophysicae
Publisher
EGU
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Lund, E. J.; Farrugia, C. J.; Sandholt, P. E. (2008). Momentum transfer at the high-latitude magnetopause and boundary layers, ANNALES GEOPHYSICAE. Vol. 26, No. 8, 2449-2458. DOI: 10.5194/angeo-26-2449-2008
Comments
This is an article published by EGU in Annales Geophysicae in 2008, available online: https://dx.doi.org/10.5194/angeo-26-2449-2008