The production of DSW in the Sea of Okhotsk causes overturning
to intermediate layer depths, the deepest ventilation in the
North Pacific. Because this deep ventilation causes variability in
materials circulation and biogeochemical cycling, understanding
of the processes controlling the ventilation is crucial. Several novel
results regarding overturning mechanisms and changes in the
overturning circulation of the Okhotsk–Pacific system are reported
in this special issue.