GEOPHYSICAL EFFECTS OF THE EARTH'S MONTHLY MOTION

• Main Authors: N. S. Sidorenkov, T. S. Zhigailo
• Format: Article
• Language: English
• Published: Odessa I. I. Mechnykov National University 2013-11-01
• Series: Odessa Astronomical Publications
• Online Access: http://oap.onu.edu.ua/article/view/83955

The generation of a lunar tidal force is a major geophysical effect of the Earth's monthly motion. It is shown that synoptic processes vary simultaneously with tidal oscillations of the Earth's rotation rate and weather exhibits changes near their extremes, i.e., when the Earth is in certain positions on its monthly orbit. It is found that the quasi-biennial oscillation of the wind direction in the equatorial stratosphere is a combined oscillation caused by three periodic processes experienced by the atmosphere: (a) lunisolar tides, (b) the precession of the orbit of the Earth's monthly rotation around the barycenter of the Earth-Moon system, and (c) the motion of the perigee of this orbit. Interference of the 1.20-yearChandlerwobble with sidereal, anomalistic, and synodic lunar oscillations gives rise to beats, i.e., to slow periodic variations in the wobble amplitude with periods of 32 to 51 years.