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dc.contributor.authorReistad, Jone Peter
dc.contributor.authorLaundal, Karl Magnus
dc.contributor.authorOhma, Anders
dc.contributor.authorMoretto, Therese
dc.contributor.authorMilan, Steve
dc.PublishedReistad JP, Laundal KM, Ohma A, Moretto T, Milan S. An explicit IMF By dependence on solar wind ‐ magnetosphere coupling. Geophysical Research Letters. 2019;47(1):e2019GL086062eng
dc.description.abstractPresently, all empirical coupling functions quantifying the solar wind—magnetosphere energy—or magnetic flux conversion assume that the coupling is independent of the sign of the dawn-dusk component (B𝑦) of the Interplanetary Magnetic Field (IMF). In this paper we present observations strongly suggesting an explicit IMF B𝑦 effect on the solar wind-magnetosphere coupling. When the Earth's dipole is tilted in the direction corresponding to northern winter, positive IMF B𝑦 is found to on average lead to a larger polar cap than when IMF B𝑦 is negative during otherwise similar conditions. This explicit IMF B𝑦 effect is found to reverse when the Earth's dipole is inclined in the opposite direction (northern summer) and is consistently observed from both hemispheres. We interpret the different responses of the polar cap size due to the sign of IMF B𝑦 to likely be a result of differences in the dayside reconnection rate.en_US
dc.publisherAmerican Geophysical Unionen_US
dc.rightsAttribution CC BYeng
dc.titleAn explicit IMF By dependence on solar wind ‐ magnetosphere couplingen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2019 The Authorsen_US
dc.source.journalGeophysical Research Letters

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