Hydromagnetic gradient waves in the ionosphere

Tolstoy, I.

Journal of Geophysical Research 72(5): 1435-1442


ISSN/ISBN: 2169-897X
DOI: 10.1029/jz072i005p01435
Accession: 061146153

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Hydromagnetic gradient (HMG) waves are a magnetohydrodynamic analog of Rossby waves. It is shown here that conditions for their existence are approximately satisfied in the so-called dynamo layer of the atmosphere. As a result, it appears plausible to assume the existence of Hmg waves as traveling perturbations of the Sq current system. Corresponding micropulsations of the earth's magnetic field are estimated and may be measurable.