Dynamics of the global Sq-field

Details Dynamics of the global Sq-field Dynamics of the global Sq-field

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ang....38..283w&link_type=abstract

Annales de Geophysique, vol. 38, July-Sept. 1982, p. 283-287.

Mathematics

Logic

Atmospheric Electricity, Dynamo Theory, Geomagnetism, Magnetic Variations, Plasmasphere, Universal Time, Annual Variations, Atmospheric Conductivity, Current Density, Current Distribution, Field Aligned Currents, International Geophysical Year, Ionospheric Currents, Plasma Currents, Two Dimensional Models

Scientific paper

Morphological results about the existence of regular variations of the global Sq-field in dependence on season and universal time (UT) are described. It has been shown that two-dimensional dynamo models are able to account for most data found morphologically for mean annual Sq-fields. Attempts to describe the morphological results about UT and seasonal variations of the Sq-field with a two-dimensional dynamo model have not had success. It has been concluded that three-dimensional plasmaspheric current systems, taking into consideration the coupling between both hemispheres, are needed to explain these regular variations. The distribution of the plasmaspheric field-aligned currents to be expected from theoretical calculations as well as from the morphological results is described.

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