Planetary Modulation of Solar and Climate Oscillations

Recent studies show that solar activity exhibits a complex array of oscillatory behaviors spanning from monthly to millennial scales. Among these, the 11-year Schwabe cycle stands out as the most widely recognized solar oscillation. A number of solar oscillations appear to influence Earth's climate and offer promising avenues for understanding and forecasting climate variability. The origin of this array of solar cycles is still debated within the scientific community. One prevailing view links solar cycles entirely to internal magnetic dynamo processes operating inside the Sun. An alternative hypothesis suggests that plan- etary gravitational interactions and orbital configurations may modulate the solar dynamo itself, introducing specific periodic solar oscillations. This study examines key observational findings that support the planetary hypothesis of the connection of solar variability with climate dynamics. It is shown that planetary-induced spectral features closely align with the dominant solar and climate cycles across a broad range of temporal scales.