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    The interaction between transpolar arcs and cusp spots

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    Authors
    Fear, R.C.
    Milan, S.E.
    Carter, J.A.
    Maggiolo, R.
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    Discipline
    Physical sciences
    Audience
    Scientific
    Date
    2015
    Metadata
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    Description
    Transpolar arcs and cusp spots are both auroral phenomena which occur when the interplanetary magnetic field is northward. Transpolar arcs are associated with magnetic reconnection in the magnetotail, which closes magnetic flux and results in a “wedge” of closed flux which remains trapped, embedded in the magnetotail lobe. The cusp spot is an indicator of lobe reconnection at the high-latitude magnetopause; in its simplest case, lobe reconnection redistributes open flux without resulting in any net change in the open flux content of the magnetosphere. We present observations of the two phenomena interacting—i.e., a transpolar arc intersecting a cusp spot during part of its lifetime. The significance of this observation is that lobe reconnection can have the effect of opening closed magnetotail flux. We argue that such events should not be rare.
    Citation
    Fear, R.C.; Milan, S.E.; Carter, J.A.; Maggiolo, R. (2015). The interaction between transpolar arcs and cusp spots. , Geophysical Research Letters, Vol. 42, Issue 22, 9685-9693, DOI: 10.1002/2015GL066194.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2712
    doi: http://dx.doi.org/10.1002/2015GL066194
    scopus: 2-s2.0-84949844646
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
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