2.4.2 - Classical representation of the tides.

Two different descriptions of the tides given by two groups, both in favour of the current theory.


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prologue > index tides > 2.4 Confrontation on the tides.

2.4.1 Confrontation on the tides - introduction.
2.4.2 Two different descriptions of the tides.
2.4.3 The physical formula valid for the tides.
The ratio of the forces.
Number of the tide waves.
Unit of space of a tide wave.
When Earth, Moon and Sun are aligned.
Different tide cadences.

Code proposition: [P0] neutral; [P1] classic theory; [P2] favouring the inductive approach; [P3] inductive approach.


Two tidal waves (bulges), revolving around the Earth, westwards, with a bi-diurnal frequency.

Fig. nr. 1.

[P1] The attraction of the moon is strongest on the side of the Earth which is facing towards it. Here the above-average pull causes the waters to bulge out toward the moon in a high tide.

At the same time, on the far side of the Earth, the moon's attraction is at it's weakest, and the waters on that side bulge away from the moon, in an equal and opposite high tide.
(source: http://www.the-sea.org/tides.htm)


“... the combination of gravity and inertia create two bulges of water. One forms where the Earth and Moon are closest, and the other forms where they are furthest apart. Over the rest of the globe gravity and inertia are in relative balance. Because water is fluid, the two bulges stay aligned with the Moon as the Earth rotates” (NOAA: Ross, D.A., 1995).


Indeed, only if the Earth were completely covered with water, and if its ocean were very deep, the attraction exerted by the Moon and the Sun would produce two bulges of water, one facing the Moon, the other would be found on the opposite side of our planet - as in the figure #1.

What satellites make us see instead.

Fig. nr. 2.

video by NASA /PO.DAAC.

[See later in itinerary 2.6, “the mechanism of the tides”, how a tide basin gets formed, and what determines “the field of action of a specific tidal wave”.]


[P3] This video by NASA \ PO.DAAC. has laid bare more than one point, in the common way of explaining the ocean tides, and has prompted the present analysis.

Indeed, the ocean tides behave in a way that could not be more different from the classical representation, shown in figure #1.

Today, thanks to satellites, we know that, instead of two tidal waves, revolving around the Earth, with a bi-diurnal frequency, there are several tidal basins, each of which has a tidal wave, mostly with a bi-diurnal frequency. Only a few tidal basins have a tidal wave with diurnal frequency.

Each tidal wave does not move westbound from one meridian to the next, but around the centre point of its basin.

Clockwise in the southern hemisphere; counterclockwise in the northern one.

Bad money drives out good money.

[P3] Still today, even after the publication of the video of the NASA\PO.DAAC, they continue with the classical representation of the tides, so different from the reality.

The figure #1 remains the current commonplace representation of how ocean tides would work. You can find it everywhere: in textbooks, in tv documentaries, and now in web pages. While the figure #2 remains unknown to most people. It is a shame that those who should disseminate knowledge professionally stay put on an old cliché.

Today, even in documentaries, we can see the Earth travelled by two tidal waves, which keep themselves aligned on the position of the Moon, and even in the process of being amplified to make the understanding easier. Indeed, they make a false image easier to understand.