edu.ucar.opensky::articles:25778 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T20:01:42.264467 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7x92g4z https://doi.org/10.21978/P8D62B https Related Dataset #1 Equivalent Ionospheric Currents (EICs) derived using the Spherical Elementary Currents Systems (SECS) technique at 10 sec Resolution in Geographic Coordinates https://doi.org/10.21978/P8PP8X https Related Dataset #2 Spherical Elementary Current (SEC) Amplitudes derived using the Spherical Elementary Currents Systems (SECS) technique at 10 sec Resolution in Geographic Coordinates https://doi.org/10.5065/xj5m-8t12 https Related Dataset #3 Supporting data for Shi et al. "Geospace Concussion: Global reversal of ionospheric vertical plasma drift in response to a sudden commencement" Geospace concussion: Global reversal of ionospheric vertical plasma drift in response to a sudden commencement 2022-10-16T00:00:00Z publication https://n2t.org/ark:/85065/d7x92g4z https://doi.org/10.1029/2022GL100014 Shi, X. author Lin, Dong author Wang, Wenbin author Baker, J. B. H. author Weygand, J. M. author Hartinger, M. D. author Merkin, V. G. author Ruohoniemi, J. M. author Pham, Kevin author Wu, H. author Angelopoulos, V. author McWilliams, K. A. author Nishitani, N. author Shepherd, S. G. author UCAR/NCAR - Library publisher An interplanetary shock can abruptly compress the magnetosphere, excite magnetospheric waves and field-aligned currents, and cause a ground magnetic response known as a sudden commencement (SC). However, the transient (<similar to 1 min) response of the ionosphere-thermosphere system during an SC has been little studied due to limited temporal resolution in previous investigations. Here, we report observations of a global reversal of ionospheric vertical plasma motion during an SC on 24 October 2011 using similar to 6 s resolution Super Dual Auroral Radar Network ground scatter data. The dayside ionosphere suddenly moved downward during the magnetospheric compression due to the SC, lasting for only similar to 1 min before moving upward. By contrast, the post-midnight ionosphere briefly moved upward then moved downward during the SC. Simulations with a coupled geospace model suggest that the reversed <(E)over right arrow> x (B) over right arrow vertical drift is caused by a global reversal of ionospheric zonal electric field induced by magnetospheric compression during the SC. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation