A patch of south-east Pacific Ocean between French Polynesia and Chile has been found to be the clearest ocean waters on Earth by scientists from the University of the Mediterranean in Marseille. And the colour of water in this area is tend to be violet rather than blue. From New Scientist
In October 2004, Raimbault and colleagues set out to study the remarkable patch of ocean water on a three month cruise – called BIOSOPE – that left from Tahiti in French Polynesia, passed by Easter Island and ended on the Chilean coast. Along the way, they sampled the water's chemistry, physics and biology.
"Satellite images that track the amount of chlorophyll in ocean waters suggested that this was one of the most life-poor systems on Earth," explains Patrick Raimbault of the University of the Mediterranean, in Marseille, France (see image, right).
Marc Tedetti, also from the University of the Mediterranean, was on the expedition to investigate the water's clarity. He was struck by the colour of the water, which he describes as closer to violet than to blue.
At the clearest point of the south-east Pacific, near to Easter Island, Tedetti found that UV rays could penetrate more than 100 metres below the surface.
via SN
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