Periodicities of solar activity and solar radiation derived from observations and their links with the terrestrial environment
Solar magnetic activity is expressed via variations of sunspots and active regions varying on different timescales. The most accepted is an 11-year period supposedly induced by the electromagnetic solar dynamo mechanism. There are also some shorter or longer timescales detected: the biennial cycle (...
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Zusammenfassung: | Solar magnetic activity is expressed via variations of sunspots and active
regions varying on different timescales. The most accepted is an 11-year period
supposedly induced by the electromagnetic solar dynamo mechanism. There are
also some shorter or longer timescales detected: the biennial cycle (2-2.7
years), Gleisberg cycle (80-100 years), and Hallstatt's cycle (2100-2300
years). Recently, using Principal Component Analysis (PCA) of the observed
solar background magnetic field (SBMF), another period of 330-380 years, or
Grand Solar Cycle (GSC), was derived from the summary curve of two eigenvectors
of SBMF. In this paper, a spectral analysis of the averaged sunspot numbers,
solar irradiance, and the summary curve of eigenvectors of SBMF was carried out
using Morlet wavelet and Fourier transforms. We detect a 10.7-year cycle from
the sunspots and modulus summary curve of eigenvectors as well a 22 years cycle
and the grand solar cycle of 342-350-years from the summary curve of
eigenvectors. The Gleissberg centennial cycle is only detected on the full set
of averaged sunspot numbers for 400 years or by adding a quadruple component to
the summary curve of eigenvectors. Another period of 2200-2300 years is
detected in the Holocene data of solar irradiance measured from the abundance
of $^{14}$C isotope. This period was also confirmed with the period of 2100
years derived from a baseline of the summary curve, supposedly, caused by the
solar inertial motion (SIM) induced by the gravitation of large planets. The
implication of these findings for different deposition of solar radiation into
the northern and southern hemispheres of the Earth caused by the combined
effects of the solar activity and solar inertial motion on the terrestrial
atmosphere are also discussed. |
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DOI: | 10.48550/arxiv.2301.07480 |