Computer Science
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mmkmo..17...49s&link_type=abstract
Kakioka Magnetic Observatory, Memoirs, vol. 17, Mar. 1978, p. 49-58.
Computer Science
2
Annual Variations, Diurnal Variations, Dynamo Theory, Geomagnetism, Lunar Effects, Magnetic Variations, Oceanography, Earth-Moon System, Harmonic Analysis, Ionospheric Currents, Japan, Solar Activity Effects, Sunspot Cycle
Scientific paper
The observed lunar daily geomagnetic variation at three Japanese observatories is separated into two components corresponding to ionospheric and oceanic dynamo effects. These components of the lunar geomagnetic semidiurnal harmonic measured at Kakioka, Memambetsu, and Kanoya are provided for all, winter, equinox, summer, quiet, and active seasons. The complicated features of the observed annual mean lunar daily variation are found to be due to the oceanic dynamo effect. While the anomalous seasonal change of the variation is somewhat revised by the removal of the oceanic dynamo effect, the main cause of the anomalous change cannot be attributed to the oceanic dynamo effect. The relation between sunspot activity and lunar daily variation remains unclear.
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