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Hydrosphere and Ocean Currents

VIEWS: 347 PAGES: 14


  13.8 pg. 522-523

 All of Earth’s water, salty and fresh make up the

 Very little fresh water is available in the
  hydrosphere-perhaps one drop in every litre of
  water on the planet is drinkable

 Canada contains 10% of the world’s fresh water!
The Water Cycle
     Making Connections

 #6-9, pg. 524
The Hydrosphere and the Water
The Water Cycle Song

Bill Nye’s Water Cycle Rap

Bill Nye’s Whether the Weather

Bill Nye’s Smells Like Air Pressure

Blue Gold : Water Wars
Major Ocean

  13.9 pg. 525-527
    Major Ocean Currents

 Oceans make up a significant portion of our

 The vast oceans are heated at the equator and
  the heat is distributed throughout the world
  through ocean currents

 Norway and Iceland enjoy a warmer climate
  because of the Gulf Stream-an Atlantic Ocean
  current that transports warm water from the Gulf
  of Mexico
    Major Ocean Currents

 Warm water currents transport energy stored in
  the water from warmer parts of the world to the
  colder parts.

 Cold ocean currents move from colder regions
  to warmer regions near the equator.

 The cold water circulate through the equatorial
  regions of the world’s ocean
Causes of Ocean Currents

 Six factors influencing Ocean Currents:

1 Convection currents

2 Winds across the ocean

3 Earth’s rotation

4 Shape of continents

5 Heat capacity of water

6 Amount of salt in water
Causes of Ocean Currents

 Solar energy striking the equator creates
  convection currents causing water to flow
  towards the polar regions

 Warm water at the equator leaves and is
  replaced by cold, dense water

 The convection current is influenced by
  prevailing winds and the Coriolis effect
Causes of Ocean Currents

 Close to a continent ocean currents are forced
  to travel along the edge-like water hitting a rock
  in a river

 Earth’s rotation is eastward, oceans on the west
  are narrow and fast moving while on the east
  are wide and slow

 Only the Antarctic Circumpolar Current travels
  all the way around the world.
Causes of Ocean Currents

 The oceans act as heat sinks because of water
  has a high heat capacity-water takes a long
  time to heat up and cool down. This explains
  why coastal communities are usually much
  warmer than those inland

 Salt content-the Gulf Stream evaporates as it
  moves northward and leaves saltier, denser
  water that sinks and is replaced by less dense,
  warm water.

 Bill Nye’s Ocean Currents
Effects of Oceans Currents

 The Gulf Stream warms the coasts of Norway
  and Iceland

 A cold ocean current reaches Peru and western
  South America, so the air is dry; the Atacama
  desert exists as a result of this dryness

 On the western Pacific, the warm water
  evaporates and produces massive amounts of
Effects of Oceans Currents

 The high heat capacity of the ocean affects the
  coastal regions are cooler in summer and
  warmer in winter that regions inland.

 Ocean currents also affect the pressure of the air
  above them. Air above the warm ocean
  currents becomes less dense, forming low
  pressure systems.

 Pg. 527, #1, 2, 6, and 10 (Watch Film)

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