Induced spin velocity of the Earth and its influence to the seasonal variation of the Earth's angular velocity

TL;DR

This paper investigates how induced spin velocity affects the Earth's seasonal variations in day length, revealing discrepancies between observed and predicted semiannual and annual variations.

Contribution

It introduces a model for induced spin velocity and analyzes its impact on Earth's length of day variations, highlighting differences from existing predictions.

Findings

Semiannual variation of day length is 5.44% higher than predicted.

Annual variation of day length is 5.36% lower than predicted.

Induced spin velocity influences Earth's seasonal day length changes.

Abstract

We examine the induced spin velocity in case of the Earth. Spin velocity is induced from the conversion of a constrained spatial rotation into a spatial displacement. Its effects on Earth as a celestial body are consequences of its properties and they are examined in detail. The induced spin velocity has influence to the semiannual variation of the length of day. The annual and semiannual variation of the length of day are considered separately. The measured value in case of the semiannual variation of the length of the day is 5.44% more than the predicted, while the measured value in case of the annual variation of the length of the day is 5.36% less than the predicted.