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SuperDARN observations during geomagnetic storms, geomagnetically active times and enhanced solar wind driving

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SuperDARN observations during geomagnetic storms, geomagnetically active times and enhanced solar wind driving. / Walach, Maria; Grocott, Adrian.

In: Journal of Geophysical Research: Space Physics, Vol. 124, No. 7, 31.07.2019, p. 5828-5847.

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Walach, Maria ; Grocott, Adrian. / SuperDARN observations during geomagnetic storms, geomagnetically active times and enhanced solar wind driving. In: Journal of Geophysical Research: Space Physics. 2019 ; Vol. 124, No. 7. pp. 5828-5847.

Bibtex

@article{5f1fa9ba741f428993ff8c43dda6499f,
title = "SuperDARN observations during geomagnetic storms, geomagnetically active times and enhanced solar wind driving",
abstract = "The Super Dual Auroral Radar Network (SuperDARN) was built to study ionospheric convection at Earth and has in recent years been expanded to lower latitudes to observe ionospheric flows over a larger latitude range. This enables us to study extreme space weather events, such as geomagnetic storms, which are a global phenomenon, on a large scale (from the pole to magnetic latitudes of 40°). We study the backscatter observations from the SuperDARN radars during all geomagnetic storm phases from the most recent solar cycle and compare them to other active times to understand radar backscatter and ionospheric convection characteristics during extreme conditions and to discern differences specific to geomagnetic storms and other geomagnetically active times. We show that there are clear differences in the number of measurements the radars make, the maximum flow speeds observed, and the locations where they are observed during the initial, main, and recovery phase. We show that these differences are linked to different levels of solar wind driving. We also show that when studying ionospheric convection during geomagnetically active times, it is crucial to consider data at midlatitudes, as we find that during 19% of storm time the equatorward boundary of the convection is located below 50° of magnetic latitude.",
keywords = "SuperDARN, geomagnetic activity, geomagnetic storms, ionospheric convection, solar wind driving, solar wind-magnetosphere-ionosphere coupling",
author = "Maria Walach and Adrian Grocott",
note = "Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2019 American Geophysical Union. Further reproduction or electronic distribution is not permitted.",
year = "2019",
month = jul,
day = "31",
doi = "10.1029/2019JA026816",
language = "English",
volume = "124",
pages = "5828--5847",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9402",
publisher = "Blackwell Publishing Ltd",
number = "7",

}

RIS

TY - JOUR

T1 - SuperDARN observations during geomagnetic storms, geomagnetically active times and enhanced solar wind driving

AU - Walach, Maria

AU - Grocott, Adrian

N1 - Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2019 American Geophysical Union. Further reproduction or electronic distribution is not permitted.

PY - 2019/7/31

Y1 - 2019/7/31

N2 - The Super Dual Auroral Radar Network (SuperDARN) was built to study ionospheric convection at Earth and has in recent years been expanded to lower latitudes to observe ionospheric flows over a larger latitude range. This enables us to study extreme space weather events, such as geomagnetic storms, which are a global phenomenon, on a large scale (from the pole to magnetic latitudes of 40°). We study the backscatter observations from the SuperDARN radars during all geomagnetic storm phases from the most recent solar cycle and compare them to other active times to understand radar backscatter and ionospheric convection characteristics during extreme conditions and to discern differences specific to geomagnetic storms and other geomagnetically active times. We show that there are clear differences in the number of measurements the radars make, the maximum flow speeds observed, and the locations where they are observed during the initial, main, and recovery phase. We show that these differences are linked to different levels of solar wind driving. We also show that when studying ionospheric convection during geomagnetically active times, it is crucial to consider data at midlatitudes, as we find that during 19% of storm time the equatorward boundary of the convection is located below 50° of magnetic latitude.

AB - The Super Dual Auroral Radar Network (SuperDARN) was built to study ionospheric convection at Earth and has in recent years been expanded to lower latitudes to observe ionospheric flows over a larger latitude range. This enables us to study extreme space weather events, such as geomagnetic storms, which are a global phenomenon, on a large scale (from the pole to magnetic latitudes of 40°). We study the backscatter observations from the SuperDARN radars during all geomagnetic storm phases from the most recent solar cycle and compare them to other active times to understand radar backscatter and ionospheric convection characteristics during extreme conditions and to discern differences specific to geomagnetic storms and other geomagnetically active times. We show that there are clear differences in the number of measurements the radars make, the maximum flow speeds observed, and the locations where they are observed during the initial, main, and recovery phase. We show that these differences are linked to different levels of solar wind driving. We also show that when studying ionospheric convection during geomagnetically active times, it is crucial to consider data at midlatitudes, as we find that during 19% of storm time the equatorward boundary of the convection is located below 50° of magnetic latitude.

KW - SuperDARN

KW - geomagnetic activity

KW - geomagnetic storms

KW - ionospheric convection

KW - solar wind driving

KW - solar wind-magnetosphere-ionosphere coupling

U2 - 10.1029/2019JA026816

DO - 10.1029/2019JA026816

M3 - Journal article

VL - 124

SP - 5828

EP - 5847

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9402

IS - 7

ER -