The beauty of mother nature never disappoints. This amazing timelapse video of a high tide in Saint-Briac-sur-Mer, Bretagne (Brittany), France is no exception.

Timelapse video of a high tide (actually a flood tide) in Saint-Briac-sur-Mer, Bretagne (Brittany), France

Saint-Briac-sur-Mer is a commune in the Ille-et-Vilaine Department in Bretagne (Brittany) in northwestern France. Its population is 2.070 (as of 2017).

Tides

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

Tide changes proceed via the following stages:

  • Sea level rises over several hours, covering the intertidal zone; flood tide.
  • The water rises to its highest level, reaching high tide.
  • Sea level falls over several hours, revealing the intertidal zone; ebb tide.
  • The water stops falling, reaching low tide.

Why tides occur?

The video below explains why tides occur in the seas. The video also explains why tides, as well as moonrise and moonset, are 50 minutes later each day, based on the moon’s orbit around the earth.

Ocean tides explained. This video explains why the oceans experience two high tides and two low tides each day.

The oceans of Earth are attracted to the moon through the effects of gravity. Because the strength of the gravitational attractions depends on the separation distance of objects, the oceans on both sides of the earth, as well as the earth itself, experience different gravitational forces towards the moon, causing two oceanic bulges which result in two high tides daily.

Sources

M. Özgür Nevres

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