Final published version
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review
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TY - CHAP
T1 - Time-dependence of dawn-dusk asymmetries in the terrestrial ionospheric convection pattern
AU - Grocott, Adrian
PY - 2017/10/6
Y1 - 2017/10/6
N2 - In this chapter we consider the nature and origin of dawn-dusk asymmetries in the ionospheric convection pattern. We focus on asymmetries that are introduced via solar wind-magnetosphere-ionosphere coupling when the interplanetary magnetic field (IMF) has a strong dawn-dusk component. In particular, we address the interplay between flows that are “directly driven” by dayside coupling processes and those driven over a variety of longer timescales by internal magnetospheric dynamics. This produces variability in the ionospheric convection and leads to an inherent time dependence in the development of dawn-dusk asymmetries. Our discussion focuses on the interpretation of observations made by the Super Dual Auroral Radar Network (SuperDARN), which has provided measurements of the two-dimensional ionospheric convection pattern at 1 or 2 min resolution for the last two decades. We summarize the current state of understanding in this area and discuss unanswered questions.
AB - In this chapter we consider the nature and origin of dawn-dusk asymmetries in the ionospheric convection pattern. We focus on asymmetries that are introduced via solar wind-magnetosphere-ionosphere coupling when the interplanetary magnetic field (IMF) has a strong dawn-dusk component. In particular, we address the interplay between flows that are “directly driven” by dayside coupling processes and those driven over a variety of longer timescales by internal magnetospheric dynamics. This produces variability in the ionospheric convection and leads to an inherent time dependence in the development of dawn-dusk asymmetries. Our discussion focuses on the interpretation of observations made by the Super Dual Auroral Radar Network (SuperDARN), which has provided measurements of the two-dimensional ionospheric convection pattern at 1 or 2 min resolution for the last two decades. We summarize the current state of understanding in this area and discuss unanswered questions.
KW - complex electrodynamics
KW - interplanetary magnetic field
KW - magnetotail control
KW - planetary plasma environments
KW - solar wind-magnetosphere-ionosphere coupling
KW - terrestrial ionospheric convection pattern
KW - time-dependent dawn-dusk asymmetries
U2 - 10.1002/9781119216346.ch9
DO - 10.1002/9781119216346.ch9
M3 - Chapter (peer-reviewed)
SN - 9781119216322
T3 - Geophysical Monograph
BT - Dawn-Dusk Asymmetry in Planetary Plasma Environments
A2 - Haarland, Stein
A2 - Runov, Andrei
A2 - Forsyth, Colin
PB - American Geophysical Union
ER -