Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988baicz..39..372k&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 39, no. 6, Dec. 1988, p. 372-378.
Astronomy and Astrophysics
Astronomy
6
Annual Variations, Solar Oscillations, Solar Wind Velocity, Sunspot Cycle, Solar Corona, Solar Probes, Solar Terrestrial Interactions
Scientific paper
Solar wind velocity data from November, 1963 to May, 1980, were analyzed to determine their quasi-biennial oscillations. Periods of oscillations ranging from 1.8 to 2.2 yr, with an average of 2.0 yr were observed. The first half of the time interval is dominated by 23-26 Bartels rotations (up to Bartels rotation No. 1910). In the latter half, shorter periods of about 21-22 Bartels rotations prevailed. A change in the phase of the oscillations was observed in the latter half of 1970. Differences between the quasi-biennial oscillations of solar wind and solar activity are discussed.
Kulčár L.
Letfus V.
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