Periodogram analysis of sunspot numbers and the relation with solar activities

Mathematics – Logic

Scientific paper

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Periodic Variations, Solar Activity, Solar Cycles, Solar Radiation, Solar Rotation, Spectrum Analysis, Sunspots, Time Series Analysis, Power Spectra, Earth Atmosphere, Magnetic Variations, Prediction Analysis Techniques, Solar Constant

Scientific paper

The time series of average monthly sunspot numbers during 1900-1992 is studied by using power spectral analysis. This prediction method is used to study the sunspot periodicities relations between its, and with the other periodicities by solar activities. There are periodicities (between few days and 5 years) overwhelm on the mean solar cycle. ( 11 year cycle). These periodicities have the same relation with variations of solar constant and solar radiation reaching the Earth's atmosphere in the last solar cycle. These periods are related to the solar magnetic activity and to the modulation of solar features due to solar rotation.

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