Ocean Circulation Lesson

Thermohaline circulation is caused by 

• density
• nutrients
• coastal upwelling
• equatorial upwelling

Vertical circulation caused by wind moving across the water off shore is

• density
• nutrients
• coastal upwelling
• equatorial upwelling

Vertical circulation caused by water and wind deflected by the coriolis effect at the equator is

• density
• nutrients
• coastal upwelling
• equatorial upwelling

Upwelling is related to

• density
• nutrients
• coastal upwelling
• equatorial upwelling

Horizontal currents are set in motion by

• 45 degrees
• Coriolis effect
• wind
• upwelling

Secondary forces such as ______ influence the direction of the flow.

• 45 degrees
• Coriolis effect
• wind
• upwelling

Theoretically Ekman transport causes water to move at ___________ from the wind, but in reality the difference is__________.

• 45 degrees, 90 degrees
• 90 degrees, 45 degrees
• 5 degrees, 60 degrees
• 60 degrees, 5 degrees

The forces that prevent Ekman Transport from moving water at the full angle expected are

• Coriolis effect, rotation of Earth
• Density, temperature
• friction, gravity
• illness, exhaustion

As a result of the forces the act against Ekman transport, surface currents flow _______ in the Northern Hemisphere and _____ in the Southern Hemisphere.

• clockwise, counterclockwise
• counter clockwise, clockwise
• upward, downward
• downward, upward

The circular patters of rotating surface  currents are called:

• Equatorial currents
• poles
• circulation
• gyres