Some fresh indications of the solar origin of 4-6-year oscillation of the Earth’s rotation parameters
| Autor: | P. Pâquet, D. Djurovic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Physics
Solar constant COSMIC cancer database business.industry Oscillation lcsh:Astronomy Spectral density Astronomy and Astrophysics Astrophysics Rotation Solar irradiance Intensity (physics) lcsh:QB1-991 Optics Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics business Earth's rotation |
| Zdroj: | Serbian Astronomical Journal, Vol 1999, Iss 159, Pp 1-10 (1999) |
| ISSN: | 1820-9289 |
| Popis: | The variations of universal times difference UT1-TAI and Earth?s rotation instantaneous p?le coordinates (X,Y) are studied in the frequency range of 3 - 8 yr?1 as a function of the solar activity. It is found that power spectrum concentrations C1 and C2 are common to solar activity indicators and Earth?s rotation parameters (ERP). The linear correlation between them is also not a fortuitous one. Accordingly, by the results of this study the hypothesis of Djurovic and P?quet (1996; 1999) that the primary cause of 4-6 year oscillation lies in solar irradiance is confirmed. Between several mechanisms responsible for the ERP variations as the most probable are considered the variations of solar irradiance spectral structure (especially large in its UV range) and variations of intensity of cosmic X-rays reaching the Earth?s surface. |
| Databáze: | OpenAIRE |
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