An investigation of the magnetosphere-ionosphere response to real and idealized co-rotating interaction region events through global magnetohydrodynamic simulations

R. Ilie, M. W. Liemohn, J. U. Kozyra, J. E. Borovsky

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigates the role of interplanetary magnetic field (IMF) Bz fluctuations periodicity in the transfer of solar wind mass and energy to the magnetosphere during the co-rotating interaction region/high-speed stream event of 10 November 2003 through global modelling simulations using the space weather modelling framework. To do so, we used both solar wind observations and a variety of idealized inputs as upstream boundary conditions, describing different solar wind configurations for which relative contribution of the peak-to-noise ratio in the input Bz power spectrum to the periodicity transfer is examined. Fast Fourier transforms of both input to and the response of the magnetosphere reveal that the transfer of IMF Bz periodicity to the magnetosphere is unaltered by other solar wind parameters, although the size of the peak-to-noise ratio of the input signal is the controlling factor that determines this transfer. The global magnetosphere simulation suggests that a threshold amount of power (peak-to-noise ratio) of approximately 10 in the input signal is needed for the magnetosphere to react to the periodicity in the input Bz , while for the cross-polar cap potential, the threshold amount is significantly smaller.

Original languageEnglish (US)
Pages (from-to)3279-3303
Number of pages25
JournalProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume466
Issue number2123
DOIs
StatePublished - Nov 8 2010
Externally publishedYes

Keywords

  • Co-rotating interaction region
  • High-speed stream
  • Magnetic storms
  • Ring current

ASJC Scopus subject areas

  • Mathematics(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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