Secular and decade fluctuations of the geomagnetic field and the universal time UT1

Details Secular and decade fluctuations of the geomagnetic field and the universal time UT1 Secular and decade fluctuations of the geomagnetic field and the universal time UT1

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985baicz..36..246d&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 36, July 1985, p. 246-250.

Astronomy and Astrophysics

Astronomy

Annual Variations, Geomagnetism, Magnetic Variations, Secular Variations, Universal Time, Earth Rotation, Solar Activity Effects

Scientific paper

On the basis of the comparative analysis of ΔT = ET-UT1 (for the interval 1861 - 1978) and the geomagnetic index Aa (for the interval 1868 - 1977) it could be admitted that ΔT and Aa have common quasi-periodic variations of 11 and 22 yrs. The variations of UT1 with the characteristic 30-yr and 65-yr period, assumed by several authors, are probably due to a wrong interpretation of data.

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