What is defined as a large, rotating mass of warm or cold water? These are found on both sides of major ocean fronts, particularly ones associated with major currents.

What are similar to the answer to question one, but form throughout the world’s oceans due to dynamic shear in the water column?

What is the interface between two water masses having different physical characteristics called?

What is the name of the phenomenon which occurs when the solar heating of the surface water causes shallow negative temperature gradients? This phenomenon results in downward refraction of sound rays and reduced surface duct ranges.

What is the name of the phenomenon which involves wind-driven motion of dense, cooler and usually nutrient rich water towards the ocean surface, replacing the warmer, usually nutrient depleted surface water?