During the summer, there’s nothing better than spending time by the water, whether it’s at the beach or by a lake. It’s a popular activity, which is why many beaches get crowded when the weather heats up. However, it’s essential to stay alert and cautious whenever you’re near water. A simple mistake can lead to dangerous situations, especially with common risks like rip currents and changing tides. But there’s another hidden danger that people often overlook: square waves.
Square waves, also known as cross seas, are fascinating to look at, but they’re incredibly hazardous. These waves occur when two or more wave systems collide at different angles, forming a checkerboard-like pattern on the surface of the water. According to the European Space Agency (ESA), cross seas happen when wind-driven waves, or swells from different directions, meet. While they may seem harmless, they can create swells up to 10 feet high and unpredictable wind patterns, making it challenging for both swimmers and boats to navigate the waters.
Although cross seas are relatively rare, they can be deadly if encountered. It’s advised that anyone who comes across square waves should avoid entering the water at all costs. Instead, the best option is to stay on the shore and wait until conditions improve before venturing out.
There are specific locations around the world where square waves are more common. These areas typically lie where two large bodies of water meet, creating the perfect conditions for square waves to form. One of the most famous spots is the Île de Ré, a French island off the coast of La Rochelle. It’s a popular tourist destination, known for its stunning views of cross seas. Another well-known location is Cape Reinga in New Zealand, where the Pacific Ocean meets the Tasman Sea, creating a mesmerizing yet dangerous display of square waves.
Despite their beauty, square waves are not to be underestimated. They draw thousands of tourists to places like Île de Ré, where people gather at lighthouses to safely watch these unique oceanic patterns. But as tempting as it may be to get closer, it’s crucial to maintain a safe distance. The unusual crossing of waves at different angles may seem intriguing, but only a few people have witnessed square waves up close.
Interestingly, square waves can also be seen in shallow waters, like those off the coast of Tel Aviv, Israel. Scientists have studied these waves and linked them to the Kadomstev-Petviashvili equation, a mathematical formula that explains nonlinear wave motion and the interaction of different weather systems. While the science behind square waves is complex, one thing remains simple: they are a natural wonder to admire from afar but dangerous to engage with.
