Upwelling and Down Welling

Which of the following leads to upwelling?

• Winds converging
• Strong tides
• Strong currents
• Winds and currents moving along the coast

where does upwelling occur?

• open ocean and along coastlines

• on shores

• on the beach

• around cliffs

when does downwelling occur?

• nutrients

• when the water on the surface of the sea becomes denser than the water beneath it and so it sinks

• when wind causes surface water to build up along a coastline.

• when surface currents move away from one another

Coastal upwelling and downwelling also influence _______ and _______

• weather and climate
• tides and surface currents 

coastal downwelling, produces relatively ______ ocean surface-water near the coast.

• warm
• cold 

Surface water can be forced ______ by the pressure of the “pile” of water that forms where currents converge or wind drives the sea against a coastline.

• upward
• downward 

Upwelling is important because it brings ___________ to the surface.

• warm water

• nutrients

• carbon dioxide

• dimethyl sulfide

What is the driving force behind upwelling and downwelling?

• wind

• coriolis effect

• glacial movement