In terms of the vertical section of the ocean, the ocean can be divided into 1. The upper water mass 2. Deep water masses.

1. The upper layer of the water mass is fully mixed by the action of the wind, which creates waves and currents. The size of the wave depends, of course, on the strength of the wind. The size of the waves can range from ripples of a few centimeters to surges of up to 30 meters in a storm or rain. In addition to the height of the wave, the wavelength of the wave is also important. Like earthquakes and tsunamis generated by undersea volcanic eruptions, the damage to the coastal environment is equally severe.

2. The so-called thermocline refers to the area where the temperature of the sea water changes more than that of the upper layer. It is often the favorite hiding place of fish.

3. Deep water masses move very slowly, often taking hundreds of years to cross the entire basin. For example, it takes hundreds of years for deep water masses in the North Atlantic to resurface around the South Pole after sinking around Iceland