point amphidromique

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

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.