going with the flow
surface currents, deep currents and ocean currents.
causes of currents
Major causes of ocean currents include wind friction, gravity, and variation in water density in different parts of the ocean. Surface ocean currents are mainly caused by wind. The winds that most affect the oceans' currents are: The Westerlies (40-50 degree latitudes) blow west to east.
up-welling and downwelling
Downwelling reduces biological productivity and transports heat, dissolved materials, and surface waters rich in dissolvoccurs along the west coast of Alaska in the eastern boundary region of the Gulf of Alaska gyre (driven by winds in the Aleutian low).ed oxygen to greater depths. This
how deep water masses form
they form primary at high altitude. by becoming more dense than surrounding surface waters and sinking or several mechanisms are possible! – Make salty water cold – Make cold water salty – Make any water REALLY salty. examples of this would be– Atlantic: NADW, AABW, MOW – Pacific: COW, NPIW – Antarctic: AABW, AAIW