Quasiperiodic variations in manifestations of solar activity

Details Quasiperiodic variations in manifestations of solar activity Quasiperiodic variations in manifestations of solar activity

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rpsct...2...72m&link_type=abstract

In its JPRS Report: Science and Technology. USSR: Space p 72 (SEE N88-16063 08-42) Transl. into ENGLISH from Kosmicheskiye Issle

Physics

Periodic Variations, Solar Activity, Time Series Analysis, Annual Variations, Galactic Cosmic Rays, Solar Protons, Solar Terrestrial Interactions, Spectrum Analysis

Scientific paper

A spectral time series analysis for the 20th and 21st solar cycles shows that the variations of various geoheliophysical characteristics have three basic periods less than 11 years; approx. two years, approx. one year, and approx. five months; the quasi-biennial variations are the most intense. Variations of the frequency of solar proton events and galactic cosmic rays are basically in counterphase. The period of quasi-biennial variations in the 21st cycle is shorter than that in the 20th cycle.

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