Vertical ocean circulation is the result of differences in what between adjacent water masses?

Question

Quizplus · Accepted Answer

Vertical ocean circulation is mainly driven by differences in temperature and salinity between adjacent water masses. These differences create variations in water density, which causes water to sink or rise, creating the vertical circulation. The Coriolis effect can influence the direction of circulation, but it is not the primary factor driving vertical circulation.

Vertical Ocean Circulation Is the Result of Differences in What