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Dynamics of ionospheric plasma in the plasma sheet

Urheber*innen

Kistler,  Lynn
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Mouikis,  Christopher
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Liao,  Jing
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Miyoshi,  Yoshizumi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Shoji,  Masafumi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Asamura,  Kazushi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kasahara,  Satoshi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Yokota,  Shoichiro
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Keika,  Kunihiro
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Hori,  Tomo
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Shinohara,  Iku
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

Kistler, L., Mouikis, C., Liao, J., Miyoshi, Y., Shoji, M., Asamura, K., Kasahara, S., Yokota, S., Keika, K., Hori, T., Shinohara, I. (2023): Dynamics of ionospheric plasma in the plasma sheet, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1111


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018102
Zusammenfassung
One of the characteristics that distinguishes the storm-time plasma sheet from the non-storm-time plasma sheet is the enhanced contribution of ionospheric heavy ions, particularly O+. Enhanced outflow is observed throughout the auroral oval during a storm, from the dayside cusp region to the nightside auroral region. The dayside cusp outflow can be enhanced prior to the storm main phase, particularly in association with coronal mass ejections, and it then convects through the lobe to reach the plasma sheet. The nightside aurora shows high fluxes of bursty outflow during the main phase. Recent results have shown that the source of the near-earth plasma sheet can change dramatically during storms in response to changes in the interplanetary magnetic field. This talk will use a combination of statistical measurements from FAST/TEAMS in the auroral regions with recent measurements from the Arase, MMS and Van Allen Probes satellites to address the conditions that drive the outflow and bring it into the plasma sheet. The goal is to understand how the system-level drivers enhance the ionospheric contribution, and how that affects the geomagnetic storms.