Antarctic bottom water
= Antarctic bottom water
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<Antarctic bottom water> is a dense southern-origin <water> <mass> that ventilates much of the abyssal ocean. Cooling and <brine rejection> form dense shelf <water>; its descent and mixing with adjacent <waters> contribute to <Antarctic bottom water> production. Shelf production is geographically concentrated and does not mean that every <polynya> exports <water> to the abyss.