but as that upper layer warms up, the oxygen-rich waters are less likely to mix down into cooler layers of the ocean because the warm waters are less dense and do not sink as readily.
but as that upper layer warms up, the oxygen-rich waters are less likely to mix down into cooler layers of the ocean because the warm waters are less dense and do not sink as readily.
anoxic event:89
if high latitude waters are warmer than 5 °c (41 °f), their density is too low for them to sink below the cooler deep waters.