Seasonal Oscillations in Local Deformations and Insolation of Earth’s Surface

The spectral structure and trends in variations of local nonmodeled deformations of Earth at the Simeiz site are the focus of this study. In the time series of radio interferometric observations carried out within international projects, periodic components in addition to surface deformations at the Simeiz site were found and modeled. The amplitude of the most significant seasonal component is 3.34 mm. With the frequency−time wavelet transform, the time localization and changes in the power and frequency of oscillations were revealed for the time interval from 1980 to 2014. It was found that regular solar and geodynamic oscillations observed in the satellite data influenced the insolation of Earth’s surface at the Kara-Dag site in the period from 1983.5 to 2005.5. Parameters of the seasonal component were determined. Possible causes of the increase in the amplitude of the seasonal component are discussed.