edu.ucar.opensky::articles:19359 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T15:03:39.289874 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7sn0brt Magnetospheric cavity modes driven by solar wind dynamic pressure fluctuations 2009-07-01T00:00:00Z publication https://n2t.org/ark:/85065/d7sn0brt https://doi.org/10.1029/2009GL039045 Claudepierre, S. G. author Wiltberger, Michael author Elkington, S. R. author Lotko, W. author Hudson, M. K. author UCAR/NCAR - Library publisher We present results from Lyon-Fedder-Mobarry (LFM) global, three-dimensional magnetohydrodynamic (MHD) simulations of the solar wind-magnetosphere interaction. We use these simulations to investigate the role that solar wind dynamic pressure fluctuations play in the generation of magnetospheric ultra-low frequency (ULF) pulsations. The simulations presented in this study are driven with idealized solar wind input conditions. In four of the simulations, we introduce monochromatic ULF fluctuations in the upstream solar wind dynamic pressure. In the fifth simulation, we introduce a continuum of ULF frequencies in the upstream solar wind dynamic pressure fluctuations. In this numerical experiment, the idealized nature of the solar wind driving conditions allows us to study the magnetospheric response to only a fluctuating upstream dynamic pressure, while holding all other solar wind driving parameters constant. The simulation results suggest that ULF fluctuations in the solar wind dynamic pressure can drive magnetospheric ULF pulsations in the electric and magnetic fields on the dayside. Moreover, the simulation results suggest that when the driving frequency of the solar wind dynamic pressure fluctuations matches one of the natural frequencies of the magnetosphere, magnetospheric cavity modes can be energized. Citation: Claudepierre, S. G., M. Wiltberger, S. R. Elkington, W. Lotko, and M. K. Hudson (2009), Magnetospheric cavity modes driven by solar wind dynamic pressure fluctuations, Geophys. Res. Lett., 36, L13101, doi:10.1029/2009GL039045. 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 2009 American Geophysical Union. None eng geoscientificInformation