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The-Oceans

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					The Oceans
           Take-Away Points
1. The ocean is salty because erosion brings
   dissolved elements to the sea
2. The Coriolis Effect causes ocean currents
   to travel curving paths
3. Surface currents in the ocean are driven
   by the winds
4. Vertical movements in the ocean are due
   to density differences
           Composition of Sea Water
Element           Weight %:
                           1%=10
    gm/liter
                                       •   Br            0.0065
•   Cl            1.9                  •   C             0.0028
•   Na            1.05                 •   Sr            0.00081
•   Mg            0.135                •   B             0..00096
•   S             0.0885               •   Si            0.00030
•   Ca            0.040                •   F             0.00013
•   K             0.038

1. The ocean is salty because erosion brings dissolved elements to the sea
      The Coriolis Effect
• Due to moving on a
  rotating earth
• Things on equator are
  moving faster than
  points near poles
• Affects:
   – Winds
   – Ocean Currents
   – Tides

2. The Coriolis Effect causes ocean currents to travel curving paths
    The Coriolis Effect
• Things moving toward
  the equator are
  deflected west
• Things moving
  poleward are deflected
  east
• Movements are
  deflected to right in
  Northern Hemisphere
• Movements are
  deflected to left in
  Southern Hemisphere

2. The Coriolis Effect causes ocean currents to travel curving paths
      Not a
 Manifestation of
the Coriolis Effect!

• Too small scale
  for the Coriolis
  Effect to be
  significant
              Ocean Currents




3. Surface currents in the ocean are driven by the winds
Tracking Ocean Currents
           The Global Heat Conveyor




4. Vertical movements in the ocean are due to density differences
           Take-Away Points
1. The ocean is salty because erosion brings
   dissolved elements to the sea
2. The Coriolis Effect causes ocean currents
   to travel curving paths
3. Surface currents in the ocean are driven
   by the winds
4. Vertical movements in the ocean are due
   to density differences

				
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posted:12/1/2009
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