How a Realistic Magnetosphere Alters the Polarizations of Surface, Fast Magnetosonic, and Alfven Waves.

ABSTRACT: System-scale magnetohydrodynamic (MHD) waves within Earth's magnetosphere are often understood theoretically using box models. While these have been highly instructive in understanding many fundamental features of the various wave modes present, they neglect the complexities of geospace such as the inhomogeneities and curvilinear geometries present. Here, we show global MHD simulations of resonant waves impulsively excited by a solar wind pressure pulse. Although many aspects of the surface, fast magnetosonic (cavity/waveguide), and Alfvén modes present agree with the box and axially symmetric dipole models, we find some predictions for large-scale waves are significantly altered in a realistic magnetosphere. The radial ordering of fast mode turning points and Alfvén resonant locations may

SUBMITTER: Archer MO 

PROVIDER: S-EPMC9286832 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature