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Found 4 entries in the Bibliography.
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Determination of Auroral Electrodynamic Parameters From AMPERE Field-Aligned Current Measurements
We calculate high latitude electrodynamic parameters using global maps of field-aligned currents from the Active Magnetosphere and Planetary Response Experiment (AMPERE). The model is based on previous studies that relate field-aligned currents to auroral Pedersen and Hall conductances measured by incoherent scatter radar. The field-aligned currents and conductances are used to solve for the electric potential at high latitudes from which electric fields are computed. The electric fields are then used with the conductances t ...
Robinson, R.; Zanetti, Larry; Anderson, Brian; Vines, Sarah; Gjerloev, Jesper;
Published by: Space Weather Published on:
YEAR: 2021   DOI: 10.1029/2020SW002677
space weather; auroral currents; auroral electrodynamics; conductivities; electric fields; field-aligned currents
Explicit IMF By-Dependence in Geomagnetic Activity: Quantifying Ionospheric Electrodynamics
Geomagnetic activity is mainly driven by the southward (Bz) component of the interplanetary magnetic field (IMF), which dominates all solar wind coupling functions. Coupling functions also depend on the absolute value of the dawn-dusk (By) component of the IMF, but not on its sign. However, recent studies have shown that for a fixed level of solar wind driving, auroral electrojets in the Northern Hemisphere (NH) are stronger for By \textgreater 0 than for By \textless 0 during NH winter. In NH summer, the dependence on the B ...
Holappa, L.; Robinson, R.; Pulkkinen, A.; Asikainen, T.; Mursula, K.;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2021   DOI: 10.1029/2021JA029202
space weather; magnetosphere-ionosphere coupling; field-aligned currents; geomagnetic activity
Average field-aligned current configuration parameterised by solar wind conditions
We present the first large-scale comparison of the spatial distribution of field-aligned currents as measured by the Active Magnetosphere and Planetary Electrodynamics Response Experiment, with the location and brightness of the average auroral oval, determined from the Imager for Magnetopause-to-Aurora Global Exploration far ultraviolet instrument. These distributions are compared under the same interplanetary magnetic field magnitude and clock angle conditions. The field-aligned currents and auroral oval drop to lower l ...
Carter, J.; Milan, S.; Coxon, J.; Walach, M.-T.; Anderson, B.;
Published by: Journal of Geophysical Research: Space Physics Published on: 01/2016
YEAR: 2016   DOI: 10.1002/2015JA021567
Strong ionospheric field-aligned currents for radial interplanetary magnetic fields
The present work has investigated the configuration of field-aligned currents (FACs) during a long period of radial interplanetary magnetic field (IMF) on 19 May 2002 by using high-resolution and precise vector magnetic field measurements of CHAMP satellite. During the interest period IMF By and Bz are weakly positive and Bx keeps pointing to the Earth for almost 10 h. The geomagnetic indices Dst is about -40 ...
Wang, Hui; Lühr, Hermann; Shue, Jih-Hong; Frey, Harald.; Kervalishvili, Guram; Huang, Tao; Cao, Xue; Pi, Gilbert; Ridley, Aaron;
Published by: Journal of Geophysical Research: Space Physics Published on: 05/2014
YEAR: 2014   DOI: 10.1002/2014JA019951
air upwelling; field-aligned currents; radial interplanetary magnetic field