Coastal upwelling systems

Where are the largest upwelling systems found? Think of EBUS!

• Western boundary of the ocean

• Eastern boundaries of the ocean

• Southern boundaries of the ocean

• Northern boundaries of the ocean

Complete the phrase:

Coastal upwelling results in...

• cooler, fresher and nutrient rich water from depths to rise up to the surface.

• warm, salty and nutrient poor water from depths to rise up to the surface.

• cooler, fresher and nutrient rich water to sink from the surface to the deeper reaches of the ocean.

• warm, salty and nutrient poor water to sink from the surface to the deeper reaches of the ocean.

True or False:

Upwelling results in the deepening of the thermocline.

• True

• False

Earth rotates in which direction?

• South to north

• East to west

• West to east

• North to south

Winds blow in which direction to drive coastal upwelling?

• Alongshore

• Onshore

The coriolis force causes objects to be deflected to their ________ in the Southern Hemisphere?

• left

• right

• no deflection

In the Southern Hemisphere, Cyclonic eddies (e.g. Durban Eddy) are characterised with having:

• 1. Clockwise rotation

  2. Low sea-surface height

  2. Cold core

• 1. Anticlockwise rotation

  2. High sea-surface height

  2. Warn core

Fill in the blanks

Diverging surface waters in cyclonic eddies results in a ______ of surface waters which is replaced by ______ water from the deeper reaches.

• 1. Deficit

  2. Cool water

• 1. Build-up

  2. Warm water

• 1. Deficit

  2. Warm water

• 1. Build-up

  2. Cool water

Cold water rising to the surface as a result of upwelling cools the air in the region and promotes the development of:

• mist

• clear blue skies

• sea fog

• rain

True or False

Upwelling is responsible for phyotoplankton blooms which attracts an abundance of fish, mammals, sharks and birds to eat.

• True

• False