Whether the water at your local beach is being roiled by nasty weather or is a perfectly calm expanse of blue, there’s always a great deal going on under the surface. The ocean is composed of various currents and water masses; those currents flow around the world through what is called thermohaline circulation.
Click here for original story, The Atlantic Ocean’s major current system is slowing down—but a 21st century collapse is unlikely
Source: Phys.org