Motion of the Ocean Ocean Currents An Ocean

Motion of the Ocean

Ocean Currents An Ocean Current is a mass of moving water in the ocean Surface Currents originate from strong winds blowing over the ocean that are set in motion by uneven heating of Earth’s surface; cover large area. Northern Hemisphere – Clockwise Southern Hemisphere – Counter Clockwise Ex. Gulf Stream

Deep Currents Dense ocean water is by the poles, because it is cold. The cold water travels along the ocean floor

Deep Currents Upwelling – When water moves from great depths to the surface bringing nutrients

Deep Currents Downwelling – When water moves from the surface to great depths bringing O 2

What contributes to the amount of dissolved oxygen in the ocean? How does oxygen get added to the ocean?

PLANTS! Through photosynthesis, aquatic plants release oxygen. It’s the exact same process as on land when plants release oxygen for us to breathe! Downwelling helps distribute the oxygen to lower levels where photosynthetic organisms (plants) don’t exist due to a lack of sunlight.

Resources of the Ocean Fish and other food sources for eating!

Resources of the Ocean Oil Deposits have been found along the shores, 30% of the world’s oil is pumped from below the seafloor

Resources of the Ocean Minerals are on the ocean floor such as, iron, cobalt, copper, lead, gold, tin, diamond, salt, and gravel

Humans & Our Oceans

Overfishing When people catch fish at a faster rate than they reproduce http: //www. youtube. com/watch? v=cb. N 161 y. B BGA

By-Catch Are the fish that are caught by a net, but are thrown back to sea, 30% of fish go back to sea, dead or alive

Ocean Pollution 44% of Ocean pollution comes from runoff 33% is from air pollution 12% is from shipping and oil spills 10% is from ocean dumping 1% is from offshore drilling

Ocean Pollution