Kelvin waves: what they are and why they could increase the risk of flooding on the Pacific coast

Kelvin waves, a phenomenon associated with El Niño, are currently moving across the Pacific Ocean. These pulses of warm water are projected to increase sea levels by up to 30 centimeters along the west coast of the United States, potentially raising the risk of coastal flooding.

The phenomenon involves deep-ocean water movement that does not break upon reaching the shore in the manner of typical surface waves. The progression of these pulses is being monitored for their potential impact on coastal infrastructure and maritime conditions in the region.