KARSTEN SCHNEIDER / SCIENCE PHOTO LIBRARY KARSTEN SCHNEIDER / SCIENCE PHOTO LIBRARY
Global ocean currents (swirling coloured lines), satellite-based graphic. The colours indicate ocean temperatures, ranging from the warm tropics (red) to cooler water (green) in more temperate latitudes. Ocean currents seen here include the warmer Equatorial Counter in the Pacific (off west coast of Central and South America), and the Gulf Stream in the North-western Atlantic (off the east coast of North America). On the east coast of Africa is the Agulhas Current, which forms rings as it retroflects off cooler water in the Agulhas Basin off the southern tip of Africa.
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