What are square waves and are they dangerous? The cross-patterned sea phenomenon that could spell...
These cubic squares in the sea are known as 'cross seas'. They occur when differing weather conditions moving in two separate directions clash. In 2010 the European Space Agency said cross waves are actually quite common as they happen when 'two swell systems' coexist. And scientists also say this strange watery occurrence is an example of the equation at play. These changing winds mean older waves continue and rather than breaking at the shore, they collide with more recent waves. The transfer of energy created in the water creates a continuous disturbance that create these crest, which turn into squares. So the squares are created, all because of two different sets of wind that are going against one another. They also can be found in both the ocean as well as the seaside. This chessboard-like pattern created on the watery surface looks stunning to the human eye, but can be risky for surfers and swimmers wanting to enjoy the waves. But, the real risk for swimmers, small boats and surfers happens when big cross waves occur, as cross waves can sometimes get to 10 feet high - which is a whooping three metres. The larger waves from differing directions can even cause boats to collect water. It has also been shown that an excessive amount of accidents happen because of these square waves, including number of shipwrecks have been caused by 'cross seas' according to . If you find yourself caught up in a square wave because you failed to recognise it in time it can be fairly dangerous. The 'swells' get much bigger and you could find yourself desperately trying to escape two competing currents. Equally, waves around the globe are getting stronger as a result of climate change. This mixed with ever-rising ocean levels means the risk of damage to our seasides become higher. have given the following advice to help people avoid getting caught up in those deceiving rip currents, which also applies to those deceiving square waves: It is much safer and advised to enjoy the look of this watery phenomenon safely, with your two feet and ten toes on land. If you want to be in a chance of spotting these square waves it may be worth noting that they are usually seen in waters that are slightly more shallow. The western coast of Ile de Re in France has been spotted with this types of waves and is a great example of how you can appreciate this beautiful natural occurrence safely. These square waves have also been seen in Tel Aviv, Isreal.