Research output: Contribution to conference - Without ISBN/ISSN › Poster
Research output: Contribution to conference - Without ISBN/ISSN › Poster
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TY - CONF
T1 - Convection in the Magnetosphere-Ionosphere System: a Multi-Mission Survey of its Response to IMF By Reversals
AU - Case, Nathan
PY - 2019/12/10
Y1 - 2019/12/10
N2 - The By-component of the interplanetary magnetic field (IMF) has consistently been shown to exert significant influence on the variability of the coupled solar wind-magnetosphere-ionosphere system. Through multiple superposed epoch analyses, we have identified some of the timings involved in the SW-M-I system's response to reversals in the orientation of the IMF By component. Data from the Cluster Electron Drift Instrument indicates that the lobes respond quickly, with initial changes starting in as a little as 5 min after a reversal and an end state being reached within 30-40 min. Data from the ground-based SuperDARN radar network show that the corresponding ionospheric flows (≥75° MLAT) also respond on these prompt timescales. However, at least on these short timescales, plasma flows recorded by a range of spacecraft in the plasmasheet do not show a clear response to the IMF By reversals and nor do the counterpart flows in the SuperDARN data (60-65° MLT). We discuss the significance of these results in terms of the different driving mechanisms that may be at play.
AB - The By-component of the interplanetary magnetic field (IMF) has consistently been shown to exert significant influence on the variability of the coupled solar wind-magnetosphere-ionosphere system. Through multiple superposed epoch analyses, we have identified some of the timings involved in the SW-M-I system's response to reversals in the orientation of the IMF By component. Data from the Cluster Electron Drift Instrument indicates that the lobes respond quickly, with initial changes starting in as a little as 5 min after a reversal and an end state being reached within 30-40 min. Data from the ground-based SuperDARN radar network show that the corresponding ionospheric flows (≥75° MLAT) also respond on these prompt timescales. However, at least on these short timescales, plasma flows recorded by a range of spacecraft in the plasmasheet do not show a clear response to the IMF By reversals and nor do the counterpart flows in the SuperDARN data (60-65° MLT). We discuss the significance of these results in terms of the different driving mechanisms that may be at play.
M3 - Poster
T2 - AGU Fall Meeting 2019
Y2 - 9 December 2019 through 13 December 2019
ER -