Features of the latitudinal distribution of the annual variation of the geomagnetic field level and circumpolar current system in 1964

Details Features of the latitudinal distribution of the annual variation of the geomagnetic field level and circumpolar current system in 1964 Features of the latitudinal distribution of the annual variation of the geomagnetic field level and circumpolar current system in 1964

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ge%26ae..50..536p&link_type=abstract

Geomagnetism and Aeronomy, Volume 50, Issue 4, pp.536-541

Computer Science

Scientific paper

The results of investigations of the latitudinal distribution of annual variation of the geomagnetic field level in the seasons of 1964 (International Quiet Sun Year) using the data from 95 world magnetic observatories located at various longitudes in the latitude range 83° N-90° S are reported. The latitudinal features of the X, Y, and Z components of the geomagnetic field have been analyzed. It has been shown that the amplitudes (summer-winter differences) of the annual variation are maximal in the polar regions, decrease continuously to zero towards the equator, and are identical for both the Northern and Southern hemispheres with a half-year delay (local summer). The amplitudes of the equinox-winter difference in the equinox periods are smaller than those in summer, but are manifested simultaneously in the Northern and Southern hemispheres. An equivalent circumpolar current system has been constructed, which is responsible for the annual variation of the geomagnetic field level. Its parameters have been determined.

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