A deeper understanding of Antarctic Bottom Water. Researchers have learned new information on how Antarctica's subsurface ice formation contributes to the circulation of cold, dense water that sinks to the ocean floor, an important aspect of global water circulation. A team from Hokkaido Unive
Around the coast of Cape Darnley, frazil ice forms efficiently under the sea surface particularly due to the strong wind and resulting heat loss. When Frazil ice forms, it generates cold, dense water which sinks to the seabed forming Antarctic Bottom Water . Credit: Kay I. Ohshima et al.
The cold, dense water formed around Antarctica sinks to the seabed, driving global ocean circulation. Credit: Kay I. Oshima Around the coast of Cape Darnley, frazil ice forms efficiently under the sea surface particularly due to the strong wind and resulting heat loss. When Frazil ice forms, it generates cold, dense water which sinks to the seabed forming Antarctic Bottom Water . Credit: Kay I. Ohshima et al.,Their key significance is that they involve an area where water is cooled by strong wind from severely cold Antarctica, especially in open water areas within the pack ice called polynyas.
The researchers also suggest that the frazil ice could incorporate the sediment at the sea bottom and release it as the ice melts. This may yield a new understanding of the circulation of nutrients that fertilize plankton to influence the general biological productivity of Antarctic waters.
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