Upwelling in the Ocean
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Questions and Answers

Which scientist was one of the first to map out the path of the Gulf Stream?

  • Isaac Newton
  • Ben Franklin (correct)
  • Galileo Galilei
  • Albert Einstein
  • What are the circular currents spun up by prevailing winds called?

  • Trade currents
  • Gyre currents (correct)
  • Boundary currents
  • Prevailing currents
  • How many gyre currents are there in each hemisphere?

  • 3
  • 4 (correct)
  • 2
  • 1
  • What is the direction of the currents in the northern hemisphere?

    <p>Clockwise</p> Signup and view all the answers

    What happens to the sea surface height as you move offshore from the Gulf Stream?

    <p>It increases</p> Signup and view all the answers

    Which currents are responsible for building hills in the middle of the North Atlantic Ocean?

    <p>Gulf Stream currents</p> Signup and view all the answers

    What is unique about the equatorial counter currents?

    <p>They are not driven by wind or Coriolis effect</p> Signup and view all the answers

    Where do the equatorial counter currents pull water across the ocean basins towards?

    <p>East</p> Signup and view all the answers

    What is the one place on the planet where a current can go in a straight line without being deflected?

    <p>Equator</p> Signup and view all the answers

    Which factor controls the ease of vertical mixing in seawater?

    <p>The density difference between deep water and surface water</p> Signup and view all the answers

    Where is it easiest to replace surface water with deep water?

    <p>Near the poles</p> Signup and view all the answers

    What does the abundance of chlorophyll indicate in the ocean?

    <p>The presence of nutrients</p> Signup and view all the answers

    Where is upwelling most likely to occur along the coastline?

    <p>Along the west coast</p> Signup and view all the answers

    What does the global map of upwelling show?

    <p>Upwelling occurs along all coastlines</p> Signup and view all the answers

    Which current is responsible for bringing warm water back towards the eastern part of an ocean basin?

    <p>Indian equatorial counter-current</p> Signup and view all the answers

    What happens to the temperature of the water as it moves from the poles towards the equator?

    <p>It warms up</p> Signup and view all the answers

    Where does upwelling occur in the ocean?

    <p>Along the western coasts of continents</p> Signup and view all the answers

    What happens to the water temperature along the eastern coasts of continents?

    <p>It cools down</p> Signup and view all the answers

    What makes water upwelling biologically important?

    <p>The presence of nutrients</p> Signup and view all the answers

    Which direction would you expect the Coriolis effect to deflect the equatorial current north of the Equator?

    <p>Towards the right</p> Signup and view all the answers

    What is one way to detect upwelling along the equator?

    <p>Strong biological productivity</p> Signup and view all the answers

    What is the evidence of upwelling happening near Portugal and the coast of Africa?

    <p>Decreased water temperature</p> Signup and view all the answers

    What kind of surface current is generated when a wind blows from north to south along the west coast of California in the northern hemisphere?

    <p>Current moving towards the west</p> Signup and view all the answers

    Which direction does the wind need to blow in order to generate upwelling along the California coastline?

    <p>From north to south</p> Signup and view all the answers

    Why are upwellings more likely to happen along west coasts compared to east coasts?

    <p>The water in the western boundary current is colder and denser</p> Signup and view all the answers

    What determines the consistency of upwellings along west coasts?

    <p>All of the above</p> Signup and view all the answers

    Can upwelling occur along the East Coast of a continent?

    <p>Yes, but it is more difficult compared to the West Coast</p> Signup and view all the answers

    Which area is likely to have the strongest density gradient between surface water and deep water?

    <p>The western boundary current</p> Signup and view all the answers

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