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Nature 416, 136-139 (14 February 2002) | doi:10.1038/416136a

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Oceanography: An extra dimension to mixing

Chris W. Hughes

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According to a new theory, stratification of the oceans is controlled by a balance between heat input at the surface and heat redistribution by eddies. But it is early days for this sea-change in thinking.

In the oceans, buoyant surface water lies above denser deep water. In most parts of the world there is a well-defined boundary between the two in which, at depths typically between 100 m and 1,000 m, the temperature changes rapidly between surface and deep values.