Breaking wave

In fluid dynamics and nautical terminology, a breaking wave or breaker is a wave that has enough energy to “break” at its peak. This means the wave reaches a point where its smooth movement turns into chaotic motion. At this point, simple models that describe wave behavior often stop working.

A common example of a breaking wave is when waves on the water crash onto a coastline. Wave breaking usually happens when the wave grows so big that the top part flips over. The term “breaking wave” is also used in other areas of science. For example, in meteorology, air waves are said to break when they create colder areas higher up, spreading energy in an unstable way. Breaking waves can also occur in plasmas, which are hot, charged gases, when particles move faster than the wave.

A reef or a shallow area of water, like a shoal, where waves often break, can also be called a breaker.

Types

Water waves can break in many places, but they often break near beaches because the water gets shallower. There are four main types of breaking waves: spilling, plunging, collapsing, and surging.

Spilling waves happen when the ocean floor slopes gently. The wave gets steeper until it becomes unstable, and foamy water spills down the front of the wave. This happens slowly as the wave moves toward the shore.

Plunging waves occur when the ocean floor is steep or changes suddenly in depth. The wave gets very steep, then curls over and falls down. Surfers love plunging waves because they can ride inside the curling part, called a "tube".