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A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc.

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A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc. / Kosch, Mike J.; Scourfield, M. W. J.; Nielsen, E.
In: Journal of Geophysical Research, Vol. 103, No. A12, 12.1998, p. 29383-29391.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Kosch, MJ, Scourfield, MWJ & Nielsen, E 1998, 'A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc.', Journal of Geophysical Research, vol. 103, no. A12, pp. 29383-29391. https://doi.org/10.1029/98JA02480

APA

Kosch, M. J., Scourfield, M. W. J., & Nielsen, E. (1998). A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc. Journal of Geophysical Research, 103(A12), 29383-29391. https://doi.org/10.1029/98JA02480

Vancouver

Kosch MJ, Scourfield MWJ, Nielsen E. A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc. Journal of Geophysical Research. 1998 Dec;103(A12):29383-29391. doi: 10.1029/98JA02480

Author

Kosch, Mike J. ; Scourfield, M. W. J. ; Nielsen, E. / A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc. In: Journal of Geophysical Research. 1998 ; Vol. 103, No. A12. pp. 29383-29391.

Bibtex

@article{5987091d99214d9cba9e25761423a277,
title = "A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc.",
abstract = "Simultaneous observations have been made of an auroral arc by an all-sky TV imager and of plasma flows near the arc by the Scandinavian Twin Auroral Radar Experiment. After the Harang Discontinuity, during a quiet geomagnetic interval (Kp = 1 +), the arc undergoes a sudden brightening during an eastward surge. This is accompanied by a vortex in the plasma drift velocities, poleward of the arc, of spatial extent 180 × 140 km. Westward drifts at higher latitudes merge with eastward drifts at lower latitudes near the arc. No radar backscatter was recorded equatorward of the arc. The plasma flow vortex is shown to correspond with an ionospheric region of diverging horizontal electric fields, which is equivalent to a downward field-aligned current. This region may correspond to black auroras. Spatial location of the closure current region associated with an arc by ground-based observations is a novel result.",
keywords = "DCS-publications-id, art-99, DCS-publications-personnel-id, 7",
author = "Kosch, {Mike J.} and Scourfield, {M. W. J.} and E. Nielsen",
note = "Copyright (1998) American Geophysical Union.",
year = "1998",
month = dec,
doi = "10.1029/98JA02480",
language = "English",
volume = "103",
pages = "29383--29391",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "A12",

}

RIS

TY - JOUR

T1 - A Self-consistent Explanation for a Plasma Flow Vortex Associated with the Brightening of an Auroral Arc.

AU - Kosch, Mike J.

AU - Scourfield, M. W. J.

AU - Nielsen, E.

N1 - Copyright (1998) American Geophysical Union.

PY - 1998/12

Y1 - 1998/12

N2 - Simultaneous observations have been made of an auroral arc by an all-sky TV imager and of plasma flows near the arc by the Scandinavian Twin Auroral Radar Experiment. After the Harang Discontinuity, during a quiet geomagnetic interval (Kp = 1 +), the arc undergoes a sudden brightening during an eastward surge. This is accompanied by a vortex in the plasma drift velocities, poleward of the arc, of spatial extent 180 × 140 km. Westward drifts at higher latitudes merge with eastward drifts at lower latitudes near the arc. No radar backscatter was recorded equatorward of the arc. The plasma flow vortex is shown to correspond with an ionospheric region of diverging horizontal electric fields, which is equivalent to a downward field-aligned current. This region may correspond to black auroras. Spatial location of the closure current region associated with an arc by ground-based observations is a novel result.

AB - Simultaneous observations have been made of an auroral arc by an all-sky TV imager and of plasma flows near the arc by the Scandinavian Twin Auroral Radar Experiment. After the Harang Discontinuity, during a quiet geomagnetic interval (Kp = 1 +), the arc undergoes a sudden brightening during an eastward surge. This is accompanied by a vortex in the plasma drift velocities, poleward of the arc, of spatial extent 180 × 140 km. Westward drifts at higher latitudes merge with eastward drifts at lower latitudes near the arc. No radar backscatter was recorded equatorward of the arc. The plasma flow vortex is shown to correspond with an ionospheric region of diverging horizontal electric fields, which is equivalent to a downward field-aligned current. This region may correspond to black auroras. Spatial location of the closure current region associated with an arc by ground-based observations is a novel result.

KW - DCS-publications-id

KW - art-99

KW - DCS-publications-personnel-id

KW - 7

U2 - 10.1029/98JA02480

DO - 10.1029/98JA02480

M3 - Journal article

VL - 103

SP - 29383

EP - 29391

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - A12

ER -