Mixed tide
Topic: Movements of Ocean Water: Waves, Tides and Currents · NCERT: Class 11, Ch 13 "Movements of Ocean Water"
Meaning
A mixed tide is a pattern in which successive high tides, or successive low tides, differ sharply in height. A place may get one tall high tide followed a few hours later by a much smaller one. The same is true of the two low tides. These tides happen because the shape of the ocean basin and the coast changes how the tidal bulges arrive there. Ports with mixed tides have to watch which high tide is the deeper one before bringing in large ships.
Example
Mixed tides are common along the west coast of North America, for example along the coast of California, and on many Pacific Ocean islands.
Don't confuse with
- Semi-diurnal tide: also has two highs and two lows a day, but the two highs are about the same height. In a mixed tide they are clearly unequal.