Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...204..306d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 204, no. 1-2, Oct. 1988, p. 306-312.
Astronomy and Astrophysics
Astrophysics
14
Atmospheric Circulation, Earth Rotation, Interplanetary Magnetic Fields, Solar Activity, Angular Momentum, Geomagnetism, Solar Wind, Sunspots, Variations
Scientific paper
The fluctuation of the earth rotation with a period close to 50 days has been recognized since 1981 as resulting from the exchange of angular momentum between the solid earth and the atmosphere. However, the physical origin of this fluctuation has never been understood. In this work, it is demonstrated that the same fluctuation exists in other geophysical and solar activity phenomena such as geomagnetic field, sunspots, interplanetary magnetic field, and solar wind. From these results it follows that the origin of the 50-day fluctuation lies in physical processes in the sun. It is also established that, in the vicinity of the 50-day peak, there exist two others at 38 and 68 days.
Djurović D.
Pâquet Paul
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