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AMPHIDROMIC POINT [1 record]

Record 1 2012-03-26

English

Subject field(s)
  • Hydrology and Hydrography
  • Oceanography
DEF

A point in the sea where there is zero tidal amplitude due to cancelling of tidal waves.

CONT

On a non-rotating earth the tidal wave is a standing wave with a node, i.e. a line of no vertical movement, in the centre of the basin. ... On a rotating earth the node is reduced to a point, called the amphidromic point. The tidal wave rotates around the amphidromic point, usually clockwise in the southern hemisphere and [counter]-clockwise in the northern hemisphere.

OBS

Cotidal lines radiate from an amphidromic point and corange lines encircle it.

French

Domaine(s)
  • Hydrologie et hydrographie
  • Océanographie
DEF

Point géographique autour duquel rayonnent les lignes cotidales [et où] l'amplitude de la marée est constamment nulle.

OBS

Lorsqu'il existe dans un bassin océanique un ou des points amphidromiques, la marée y est amphidromique; c'est une amphidromie.

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
  • Oceanografía
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