Amphidromic Point
D2. Hydrography, tides, waves, bathymetry and marine geologyDefinition
Location where tidal amplitude is zero and tidal phase rotates around it.
An amphidromic point is a location in a tidal basin where the range of a given constituent is zero and the cotidal lines (lines of equal high-water time) rotate around it, a standing-wave node set up by the Coriolis force acting on the tidal wave. High water sweeps around the point once per tidal period, counterclockwise in the Northern Hemisphere for M2. Tidal range grows with distance from the amphidrome.