maltide

Maltide is a term used in the field of oceanography to describe the tidal phenomenon that occurs in the North Sea and the English Channel. It is characterized by a double high tide and a double low tide each day, with the high tides being of unequal height. This phenomenon is a result of the resonance of the North Sea basin, which amplifies the tidal range.

The term "maltide" is derived from the Dutch word "maltij", which means "double tide". The maltide is most pronounced during the spring tides, which occur twice a month, around the time of the new and full moons. During these periods, the tidal range can be significantly larger than usual, leading to extreme high and low tides.

The maltide is a unique feature of the North Sea and the English Channel, and it is not observed in other parts of the world. It is a result of the specific geometry of the North Sea basin, which acts as a natural amplifier for tidal waves. The maltide has important implications for coastal engineering, navigation, and the ecology of the region.