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Earth tide (also known as solid-Earth tide, crustal tide, body tide, bodily tide or land tide) is the displacement of the solid earth's surface caused by the gravity of the Moon and Sun. Its main component has meter-level amplitude at periods of about 12 hours and longer.
Tide waves move around these points, generally counterclockwise in the N. Hemisphere and clockwise in the S. Hemisphere [14] [15] Because the M 2 tidal constituent dominates in most locations, the stage or phase of a tide, denoted by the time in hours after high water, is a useful concept. Tidal stage is also measured in degrees, with 360° per ...
Tidal range is the difference in height between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun, by Earth's rotation and by centrifugal force caused by Earth's progression around the Earth-Moon barycenter. Tidal range depends on time and location.
He strongly and mockingly rejects the lunar theory of the tides, [21] [4] and tries to explain the tides as the result of the Earth's rotation and revolution around the Sun, believing that the oceans moved like water in a large basin: as the basin moves, so does the water. [24]
Tide clock Tide clock Alunatime at Trinity Buoy Wharf, London. A tide clock is a specially designed clock that keeps track of the Moon's apparent motion around the Earth.Along many coastlines, the Moon contributes the major part (67%) of the combined lunar and solar tides.
Tide tables, sometimes called tide charts, are used for tidal prediction and show the daily times and levels of high and low tides, usually for a particular location. [1] Tide heights at intermediate times (between high and low water) can be approximated by using the rule of twelfths or more accurately calculated by using a published tidal ...
As the migrating tides stay fixed relative to the Sun a pattern of excitation is formed that is also fixed relative to the Sun. Changes in the tide observed from a stationary viewpoint on the Earth's surface are caused by the rotation of the Earth with respect to this fixed pattern. Seasonal variations of the tides also occur as the Earth tilts ...
The effect of long-period tides on lunar orbit is a controversial topic, some literatures conclude that the long-period tides accelerate the Moon and slow down the Earth. [ 4 ] [ 5 ] However Cheng [ 6 ] found that dissipation of the long-period tides brakes the Moon and actually accelerates the Earth's rotation.