The use of analytical models to determine the spatial structure of 20-year variations of the geomagnetic field

Details The use of analytical models to determine the spatial structure of 20-year variations of the geomagnetic field The use of analytical models to determine the spatial structure of 20-year variations of the geomagnetic field

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ge%26ae..29..996f&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 29, Nov.-Dec. 1989, p. 996-1000. In Russian.

Mathematics

Logic

Annual Variations, Geomagnetism, Magnetic Variations, Mathematical Models, Spatial Distribution, Amplitude Distribution Analysis, Analytic Functions, Spherical Harmonics

Scientific paper

Maps of the spatial distribution of 20-year variations of the geomagnetic field are constructed on the basis of analytical models. It is shown that the main morphological features of these variations are located at low latitudes and have the form of extremal domains fluctuating in different phases. It is suggested that 60-, 30-, and 20-year variations have a common source and describe the greater part of the secular course of the 20th century.

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