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Research output: Contribution to Journal/Magazine › Journal article › peer-review
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}
TY - JOUR
T1 - SuperDARN observations of the two component model of ionospheric convection
AU - Grocott, Adrian
AU - Walach, Maria
AU - Milan, S.E.
PY - 2023/6/17
Y1 - 2023/6/17
N2 - We use a 20 year database of Super Dual Auroral Radar Network (SuperDARN) observations to investigate the two component model of ionospheric convection. A convection pattern is included in the database if it is derived from at least 250 radar vectors and has a distribution of electric potential consistent with Dungey-cycle twin vortex flow (a negative potential peak in the dusk cell and a positive potential peak in the dawn cell). We extract the locations of the foci of the convection cells from the SuperDARN convection patterns, and compare their dependencies on the north-south component of the interplanetary magnetic field, IMF BZ, and the SuperMAG auroral electrojet index, SML. We use these parameters to define intervals of expected dayside or nightside dominated reconnection. Our results show that, under conditions favourable for dominant dayside reconnection, the dawn and dusk foci are shifted toward the dayside and that, under conditions favourable for dominant nightside reconnection, the dawn and dusk foci are shifted toward the nightside.
AB - We use a 20 year database of Super Dual Auroral Radar Network (SuperDARN) observations to investigate the two component model of ionospheric convection. A convection pattern is included in the database if it is derived from at least 250 radar vectors and has a distribution of electric potential consistent with Dungey-cycle twin vortex flow (a negative potential peak in the dusk cell and a positive potential peak in the dawn cell). We extract the locations of the foci of the convection cells from the SuperDARN convection patterns, and compare their dependencies on the north-south component of the interplanetary magnetic field, IMF BZ, and the SuperMAG auroral electrojet index, SML. We use these parameters to define intervals of expected dayside or nightside dominated reconnection. Our results show that, under conditions favourable for dominant dayside reconnection, the dawn and dusk foci are shifted toward the dayside and that, under conditions favourable for dominant nightside reconnection, the dawn and dusk foci are shifted toward the nightside.
KW - ionospheric convection
KW - SuperDARN
KW - ECPC model
U2 - 10.1029/2022JA031101
DO - 10.1029/2022JA031101
M3 - Journal article
VL - 128
JO - Journal of Geophysical Research: Space Physics
JF - Journal of Geophysical Research: Space Physics
SN - 2169-9402
IS - 6
M1 - e2022JA031101
ER -