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SuperDARN Observations of the Two Component Model of Ionospheric Convection

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posted on 2024-07-31, 15:55 authored by A Grocott, M‐T Walach, Stephen MilanStephen Milan

We use a 20 years 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 favorable for dominant dayside reconnection, the dawn and dusk foci are shifted toward the dayside and that, under conditions favorable for dominant nightside reconnection, the dawn and dusk foci are shifted toward the nightside.

Funding

Predicting the upper atmospheric response to extremes of space weather forcing

Natural Environment Research Council

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Space Weather Instrumentation, Measurement, Modelling and Risk: Thermosphere (SWIMMR-T)

UK Research and Innovation

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A Consolidated Grant Proposal for Solar and Planetary Science at the University of Leicester, 2022 - 2025

Science and Technology Facilities Council

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History

Author affiliation

College of Science & Engineering Physics & Astronomy

Version

  • VoR (Version of Record)

Published in

Journal of Geophysical Research: Space Physics

Volume

128

Issue

6

Publisher

American Geophysical Union (AGU)

issn

2169-9380

eissn

2169-9402

Copyright date

2023

Available date

2024-07-31

Language

en

Deposited by

Professor Stephen Milan

Deposit date

2024-07-30

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