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Solar-terrestrial energy transfer during sunspot cycles and mechanism of Earth rotation excitation

Published online by Cambridge University Press:  26 February 2010

Yavor Chapanov  and
Daniel Gambis
Yavor Chapanov
Affiliation:
Central Laboratory for Geodesy, Bulgarian Academy of Sciences, Akad. G. Bonchev Str. Bl.1, Sofia 1113, Bulgaria email: chapanov@clg.bas.bg
Daniel Gambis
Affiliation:
SYRTE, Observatoire de Paris, CNRS, UPMC 61, avenue de l'Observatoire, 75014 Paris, France e-mail: daniel.gambis@obspm.fr
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Abstract

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The solar-terrestrial energy transfer, due to the total solar irradiance (TSI), solar wind and interplanetary magnetic field, has 11-year modulation during the sunspot cycles. Other oscillations of solar-terrestrial energy transfer are with periods of 22 and 45 year due to the magnetic reversal and equatorial solar asymmetry, which cause corresponding oscillations of all Earth systems, including climate and weather, atmosphere and ocean circulations, geomagnetic field and core processes. A part of this energy variation is transformed to oscillations of the Earth rotation. A model of indirect mechanism of Earth rotation excitation during sunspot cycles is proposed, which is based on global water circulation and periodical mass transfer between oceans and polar ice caps. The oscillations of the mean sea level (MSL) with periods 11, 22 and 45 years are determined by sea level data for the last two centuries from 13 maregraph stations. The necessary energy of water evaporation, corresponding to the observed MSL variations is provided by TSI oscillations with amplitudes between 0.2-0.5W/m2, determined by means of reconstructed time series of the TSI since 1610. The determined mean Universal Time (UT1) amplitudes, corresponding to the 22-year and 45-year cycles of the solar activity are 185ms and 310ms.

Keywords

Sun: activitysolar-terrestrial relationstime
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S264: Solar and Stellar Variability: Impact on Earth and Planets , August 2009 , pp. 404 - 406
Copyright
Copyright © International Astronomical Union 2010

References

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