Over the last few weeks Tetiaroa has experienced some interesting tidal patterns. There was a full moon on October 13th, and we had normal ensuing low and high tides. But following that by a few days we had the arrival of a Mesoscale Eddy which kept the tide low for a good long week.
These 100-200km diameter gyres are columns of moving and mixing water called Mesoscale eddies, which are crucial in ocean temperature and nutrient movement and dispersion.
They spin off the currents of hotter Equatorial waters and move off on their own, mixing cool and hot, nutrient rich and nutrient poor waters as they travel slowly over vast distances. The eddies that spin counterclockwise move water from the ocean surface to depth, effectively lowering the sea-level over their considerable surface area. Since they move very slowly their effects can be felt for several days or more.