Currents

Link to page 1 of this section Link to page 2 of this section Link to page 3 of this section Link to page 4 of this section Link to page 5 of this section Link to page 6 of this section
next pages:

A CURRENT is a CURRENT by ANY OTHER NAME,
BUT WHAT is a CURRENT ?

Ocean currents can be divided into two types of flow based on the forces that drive them. Most currents in the upper kilometer of the ocean are driven by the wind. Mixing drives deeper currents, which brings very cold dense water up to the surface. The dense water is replaced by cold dense water that sinks to the bottom near Greenland, Norway and Antarctica. Deeper water is affected by long variability of climate. Climate controls salinity and temperature of the water, which has everything to do with density. (See our page: Role of the Ocean and Weather.)

diagram of dynamic ocean topography
from TOPEX/Poseidon Prime Mission Results Web page

The arrows in the image represent the currents directions. The length of the arrows represents the currents speed. The colors in the image represent the topography of the ocean surface. The reds and yellows are the " hills " and the blues and purples are the " valleys. "

How does the wind affect currents?

Go "FORWARD" to find out!

Printer Friendly Page

Any questions?
E-mail Us!
All Site materials copyright.
Ocean World (c)2004

Topex/Poseidon Logo

This site is developed and maintained by the Jason Education Project at
Texas A&M University
through a contract from the
Jason Project
at the
NASA Jet Propulsion Laboratory

Ocean World Privacy Statement