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Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere

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Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere. / Grocott, A.; Milan, S. E.; Yeoman, T. K.
In: Geophysical Research Letters, Vol. 35, No. 8, L08102, 24.04.2008.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Grocott, A, Milan, SE & Yeoman, TK 2008, 'Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere', Geophysical Research Letters, vol. 35, no. 8, L08102. https://doi.org/10.1029/2008GL033545

APA

Grocott, A., Milan, S. E., & Yeoman, T. K. (2008). Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere. Geophysical Research Letters, 35(8), Article L08102. https://doi.org/10.1029/2008GL033545

Vancouver

Grocott A, Milan SE, Yeoman TK. Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere. Geophysical Research Letters. 2008 Apr 24;35(8):L08102. doi: 10.1029/2008GL033545

Author

Grocott, A. ; Milan, S. E. ; Yeoman, T. K. / Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere. In: Geophysical Research Letters. 2008 ; Vol. 35, No. 8.

Bibtex

@article{4b6a0b94d8c54cafb30c6e47762819d4,
title = "Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere",
abstract = "SuperDARN radar data from both hemispheres for the interval January 1999 to November 2006 have been inspected for evidence of high-speed azimuthal flows in the nightside high-latitude ionosphere. In the northern hemisphere, 88% of the westward directed fast flows occurred during IMF BY negative intervals and 83% of the eastward flows occurred during IMF BY positive intervals. In the southern hemisphere 82% of the westward flows occurred during IMF BY positive intervals and 74% of the eastward flows occurred during IMF BY negative intervals. ∼74% of these fast flows occurred when the IMF was within the 30° < ∣θ∣ < 100° clock angle range and the AE index was below 150 nT. These results support the hypothesis that highly dynamic magnetospheric activitycan be associated with predominantly northward, but BY-dominated IMF driving conditions and subsequent non-substorm reconnection in a twisted magnetotail.",
keywords = "magnetosphere, ionosphere , dynamics",
author = "A. Grocott and Milan, {S. E.} and Yeoman, {T. K.}",
note = "Copyright 2008 by the American Geophysical Union.",
year = "2008",
month = apr,
day = "24",
doi = "10.1029/2008GL033545",
language = "English",
volume = "35",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "John Wiley & Sons, Ltd",
number = "8",

}

RIS

TY - JOUR

T1 - Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere

AU - Grocott, A.

AU - Milan, S. E.

AU - Yeoman, T. K.

N1 - Copyright 2008 by the American Geophysical Union.

PY - 2008/4/24

Y1 - 2008/4/24

N2 - SuperDARN radar data from both hemispheres for the interval January 1999 to November 2006 have been inspected for evidence of high-speed azimuthal flows in the nightside high-latitude ionosphere. In the northern hemisphere, 88% of the westward directed fast flows occurred during IMF BY negative intervals and 83% of the eastward flows occurred during IMF BY positive intervals. In the southern hemisphere 82% of the westward flows occurred during IMF BY positive intervals and 74% of the eastward flows occurred during IMF BY negative intervals. ∼74% of these fast flows occurred when the IMF was within the 30° < ∣θ∣ < 100° clock angle range and the AE index was below 150 nT. These results support the hypothesis that highly dynamic magnetospheric activitycan be associated with predominantly northward, but BY-dominated IMF driving conditions and subsequent non-substorm reconnection in a twisted magnetotail.

AB - SuperDARN radar data from both hemispheres for the interval January 1999 to November 2006 have been inspected for evidence of high-speed azimuthal flows in the nightside high-latitude ionosphere. In the northern hemisphere, 88% of the westward directed fast flows occurred during IMF BY negative intervals and 83% of the eastward flows occurred during IMF BY positive intervals. In the southern hemisphere 82% of the westward flows occurred during IMF BY positive intervals and 74% of the eastward flows occurred during IMF BY negative intervals. ∼74% of these fast flows occurred when the IMF was within the 30° < ∣θ∣ < 100° clock angle range and the AE index was below 150 nT. These results support the hypothesis that highly dynamic magnetospheric activitycan be associated with predominantly northward, but BY-dominated IMF driving conditions and subsequent non-substorm reconnection in a twisted magnetotail.

KW - magnetosphere

KW - ionosphere

KW - dynamics

U2 - 10.1029/2008GL033545

DO - 10.1029/2008GL033545

M3 - Journal article

VL - 35

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 8

M1 - L08102

ER -