On the Annual Earth’s Rotation

  • Angelo Poma
  • Edoardo Proverbio
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 86)


A number of works have presented evidence that the seasonal terms of the Earth’s rotation are variables from year to year. In this paper, introducing a parameter associated to a mean seasonal kinetic energy we show evidence of about 4 year and 7 yr periodicity. This result is briefly discussed.


Zonal Wind Polar Motion Mean Amplitude Polar Tide Seasonal Amplitude 
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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1981

Authors and Affiliations

  • Angelo Poma
    • 1
  • Edoardo Proverbio
    • 2
  1. 1.Stazione Astronomica InternazionaleCagliariItaly
  2. 2.Istituto di Astronomia dell’UniversitàCagliariItaly

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