We will now examine the circulation or flow of the surface waters of the world's oceans.
We will first look at the layered ocean, which we examined in a previous expedition, the Briny Deep.
We will next examine the processes that influence the circulation in the surface layer, for example the distribution of heat in the atmosphere, leading to variations in atmospheric pressure.
This variation produces the patterns of wind, and the rotation of the earth adds a curve or deflection to the wind.
The wind then pushes the surface water around the ocean in larger circular currents, called gyres.
Objective of Expedition: