Peculiarities of quasi-periodic variations of large-scale solar magnetic fields and of solar wind properties

Details Peculiarities of quasi-periodic variations of large-scale solar magnetic fields and of solar wind properties Peculiarities of quasi-periodic variations of large-scale solar magnetic fields and of solar wind properties

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992p%26ss...40..741k&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 40, no. 5, May 1992, p. 741-747.

Physics

4

Periodic Variations, Solar Magnetic Field, Solar Prominences, Solar Wind Velocity, Interplanetary Space, Particle Flux Density, Solar Physics

Scientific paper

Variations in the length of quiescent solar filaments and of solar wind parameters are analyzed, and some peculiarities of annual and quasi-biennial variations of these characteristics are identified. In particular, it was found that in March-April of the odd years there is a significant increase in the number of days occupied by high-speed streams, which triggers a substantial enhancement of geomagnetic activity. It is shown that the dynamics of large-scale solar magnetic fields are quite well manifested in the particle flux density of the solar wind for different velocity regimes and the occurrence frequency of high (greater than 500 km/s) and low (lower than 400 km/s) solar wind velocities. The possible changes of solar magnetic fields which could be responsible for the observed variations of these parameters are discussed. A solar wind formation model is used to analyze the relationship between the variability of large-scale solar magnetic fields and properties of the solar wind for its different formation regimes.

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