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Antarctic bottom water


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(ABW)

A dense bottom-water mass, formed in the Weddell and Ross Seas, which moves in an easterly direction around Antarctica under the influence of the deep-reaching, wind-driven, surface Antarctic Circumpolar Current (West Wind Drift). It is typified by a salinity of 34.66 parts per thousand and a low temperature (−2°C to −0.4°C). The high salinity and dense nature are caused by the removal of pure water as sea ice.

Subjects: Earth Sciences and Geography — Ecology and Conservation.


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