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Are Changes in the Earth’s Rotation Rate Externally Driven and Do They Affect Climate?

Author:

Wilson, Ian Robert George

Category:

Research Papers

Sub-Category:

Astrophysics

Language:

English

Date Published:

December 2, 2011

File:

/Research Papers-Astrophysics/Download/3811

Downloads:

3675

Keywords:

Climate, PDO, NAO, Earth's Rotataion, LOD, Solar Barycentric Motion, Lunar orbit, Lunar tides

Abstract:

Evidence is presented to show that the phases of two of the Earth’s major climate systems, the North Atlantic Oscillation (NAO) and the Pacific Decadal Oscillation (PDO), are related to changes in the Earth’s rotation rate. We find that the winter NAO index depends upon the time rate of change of the Earth’s length of day (LOD). In addition, we find that there is a remarkable correlation between the years where the phase of the PDO is most positive and the years where the deviation of the Earth’s LOD from its long-term trend is greatest. In order to prove that the variations in the NAO and PDO indices are caused by changes in the Earth’s rotation rate, and not the other way around, we show that there is a strong correlation between the times of maximum deviation of the Earth’s LOD from its long-term trend and the times where there are abrupt asymmetries in the motion of the Sun about the CM of the Solar System. At first glance, there does not appear to be an obvious physical phenomenon that would link the Sun’s motion about the Solar System’s CM to the Earth’s rotation rate. However, such a link could occur if the rate of precession of the line-of-nodes of the Moon’s orbit were synchronized with orbital periods of Terrestrial planets and Jupiter, which in turn would have to be synchronized with the orbital periods of the three remaining Jovian planets.

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