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The Northward IMF Magnetosphere


AuthorFear, Robert;
Keywordsauroral response; Earth s magnetosphere; geomagnetic activity; interplanetary magnetic field; magnetospheric dynamics; solar wind-magnetosphere coupling
AbstractThe manner in which the Earth s magnetosphere responds to the solar wind is highly dependent upon the orientation of the interplanetary magnetic field (IMF), particularly the north–south (B Z ) component. As most auroral and geomagnetic activity occurs when the IMF is southward (or weakly northward, but dominated by the dawn–dusk [B Y ] component), it is perhaps unsurprising that these conditions have received the most attention. However, when the IMF is more strongly northward (B Z \textgreater 0 and B Z \textgreater \textbarB Y \textbar), magnetospheric dynamics (e.g. magnetic reconnection and auroral activity) move to higher latitudes; certain aspects of this activity are much more poorly understood than their southward IMF counterparts. In this chapter, we provide a review of the historical context and current understanding of the behavior of the Earth s magnetosphere during periods of northward IMF, and outline some current controversies and future directions of research.
Year of Publication2021
Journal
Volume
Number of Pages293-309
Section
Date Published
ISBN978-1-119-81562-4
URLhttps://onlinelibrary.wiley.com/doi/abs/10.1002/9781119815624.ch19
DOI10.1002/9781119815624.ch19