Abstract
A STATISTICALLY significant correlation has been found between the derivatives of the envelopes of peak tidal stresses at high northern latitudes and the mean temperature of the Northern Hemisphere as reflected in oxygen isotope ratios in the Greenland ice cap. We suggest that variations in tidal stresses on the Earth caused by the Sun and Moon cause changes in the amount of stratospheric dust produced by volcanic activity; this in turn changes the thickness of the stratospheric dust veil and hence the atmospheric radiation balance. We find that, for a simple model, periodic variations in tidal stress account for 13% of the variance in the ice-core temperature record.
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