And each of these regimes leads to very different ocean (and ice) flux as a result of very different ocean physics. (icyseas.org)
The available data are insufficient to say if the changes in O2 are caused by natural variability or are trends that are likely to persist in the future, but they do indicate that large - scale changes in ocean physics influence natural biogeochemical cycles, and thus the cycles of O2 and CO2 are likely to undergo changes if ocean circulation changes persist in the future. (ipcc.ch)
But luckily for the members of the Polar Ocean Physics Group at the University of Cambridge, gathering the data means lots of exciting field work in the Arctic! (educationbusinessuk.net)