Bretagne Low Tide

by Eric Tressler

Title

Bretagne Low Tide

Artist

Eric Tressler

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Photograph

Description

In Brittany, the sea advances and retreats twice a day with a time shift of 50 minutes each day. When the moon is above the sea, it attracts the water towards it and so the sea level rises and the tide comes in. Six hours later, the moon is no longer above the sea and the force of attraction disappears. The tide then goes out. The power of the force varies depending on the positions of the sun and moon respectively in relation to the earth. When the three are aligned the attraction is at its peak. This is the time of the high tide. During this period the sea advances and retreats the farthest. This event occurs every fortnight, on the day of the full or new moon. In Brittany the very highest tides occur in March and September, coinciding with the equinoxes.

The highest tides in Europe

Besides the effect of the sun and moon, the shape of the coastline strongly influences the extent of tidal movements.On account of its geographical configuration, the coastline of the English Channel experiences the most extreme tides in Europe. The height of the tide, the variation in level from when the tide is in or out, is exceptional in Brittany, where the highest tides in Europe are recorded, for example 5.45 m at Penmarc’h, 12 m in the Bay of Saint-Malo and more than 16 m in the Bay of Mont-Saint-Michel, whereas the average worldwide is just 2 m

From frenchentree.com

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August 11th, 2013

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