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Antarctic Bottom Water (ABW) plays a critical role in ocean circulation and it has been freshening.

Ocean models predict that this could cause a decline in the amount of dissolved oxygen in our oceans.

To date there has been a continuous decrease in oceanic dissolved oxygen in most regions of the global ocean.

A decline in the oceanic oxygen will affect ocean nutrient cycles and marine habitats, and is potentially detrimental to some fisheries and coastal economies.

In this video Professor Tracey Rogers, a marine scientist from University of NSW, talks about the importance of ABW.

Study marine science @ UNSW.