A new mechanism for interpreting the motion of auroral arcs in the nightside ionosphere

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A new mechanism for interpreting the motion of auroral arcs in the nightside ionosphere. / Semenov, V. S.; Bogdanova, Y. V.; Rijnbeek, R. P.; Buchan, M. J.

In: Geophysical Research Letters, Vol. 26, No. 15, 1999GL900526, 01.08.1999, p. 2367-2370.

Research output: Contribution to journal › Article › peer-review

Author

Semenov, V. S. ; Bogdanova, Y. V. ; Rijnbeek, R. P. ; Buchan, M. J. / A new mechanism for interpreting the motion of auroral arcs in the nightside ionosphere. In: Geophysical Research Letters. 1999 ; Vol. 26, No. 15. pp. 2367-2370.

BibTeX

@article{5d1d8540306945a89df5f9df61458f7d,

title = "A new mechanism for interpreting the motion of auroral arcs in the nightside ionosphere",

abstract = "A new mechanism is proposed for predicting and interpreting the motion of auroral arcs observed in the nightside ionosphere during the expansion phase of a substorm. This mechanism is centred on the idea that such arcs act as visible manifestations of the arrival of earthward-propagating shock waves in the near-Earth magnetosphere. These shock waves are generated at a near-Earth X-line, and propagate at the local Alfv{\'e}n speed. Because of the non-uniform nature of the magnetised plasma in the magnetotail, dispersion results in a change in the shape of the wave fronts as the shocks propagate towards the ionosphere. Theoretical analysis shows that a variety of arc motions can occur as a result of this dispersion, depending on factors such as the reconnection rate, the location of the re-connection site, and gradients in the magnetic field strength and plasma density.",

author = "Semenov, {V. S.} and Bogdanova, {Y. V.} and Rijnbeek, {R. P.} and Buchan, {M. J.}",

year = "1999",

month = aug,

day = "1",

doi = "10.1029/1999GL900526",

language = "English",

volume = "26",

pages = "2367--2370",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "American Geophysical Union",

number = "15",

}

RIS

TY - JOUR

T1 - A new mechanism for interpreting the motion of auroral arcs in the nightside ionosphere

AU - Semenov, V. S.

AU - Bogdanova, Y. V.

AU - Rijnbeek, R. P.

AU - Buchan, M. J.

PY - 1999/8/1

Y1 - 1999/8/1

N2 - A new mechanism is proposed for predicting and interpreting the motion of auroral arcs observed in the nightside ionosphere during the expansion phase of a substorm. This mechanism is centred on the idea that such arcs act as visible manifestations of the arrival of earthward-propagating shock waves in the near-Earth magnetosphere. These shock waves are generated at a near-Earth X-line, and propagate at the local Alfvén speed. Because of the non-uniform nature of the magnetised plasma in the magnetotail, dispersion results in a change in the shape of the wave fronts as the shocks propagate towards the ionosphere. Theoretical analysis shows that a variety of arc motions can occur as a result of this dispersion, depending on factors such as the reconnection rate, the location of the re-connection site, and gradients in the magnetic field strength and plasma density.

AB - A new mechanism is proposed for predicting and interpreting the motion of auroral arcs observed in the nightside ionosphere during the expansion phase of a substorm. This mechanism is centred on the idea that such arcs act as visible manifestations of the arrival of earthward-propagating shock waves in the near-Earth magnetosphere. These shock waves are generated at a near-Earth X-line, and propagate at the local Alfvén speed. Because of the non-uniform nature of the magnetised plasma in the magnetotail, dispersion results in a change in the shape of the wave fronts as the shocks propagate towards the ionosphere. Theoretical analysis shows that a variety of arc motions can occur as a result of this dispersion, depending on factors such as the reconnection rate, the location of the re-connection site, and gradients in the magnetic field strength and plasma density.

UR - http://www.scopus.com/inward/record.url?scp=0033429621&partnerID=8YFLogxK

U2 - 10.1029/1999GL900526

DO - 10.1029/1999GL900526

M3 - Article

AN - SCOPUS:0033429621

VL - 26

SP - 2367

EP - 2370

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 15

M1 - 1999GL900526

ER -

ID: 53087702