1. Stream-like movement of water
Let’s Review!
1) Please take out your
Ch Column Notes.
2) Spend a few minutes
reading the content for
review.
3) Open book to p. 416.
Ocean Currents:
Stream-like movement of water

2. Surface Currents 2facts: caused by wind
Stream-like movement of water at or near the surface

3. Surface currents are controlled by:
Four Things:
1. Global winds-
winds that blow across the surface, creating ripples

6. Surface currents are controlled by:
2. Coriolis Effect:
Earth’s rotation causes wind and currents to curve.
Coriolis Effect

7. Currents and Temperature

8. 3. Continents deflect the current, changing its direction
4. Water temperature-
Cold water from poles displaces rising warm water at equator
warm water from equator is pushed back to poles

9. ?Deep Currents?
Stream-like movements of ocean water far below the surface.
Caused by differences in DENSITY.
Density in ocean water caused by: temperature and salinity differences

10. More Deep Currents…
1. decreasing temps near poles-cold water is denser so sinks to bottom
2. increasing salinity thru freezing-as ice forms, salt squeezed out, increases the salinity, changing density, water will sink
3. increasing salinity thru evaporation-salt left behind, denser, will sink

11. Cold Water Currents
Cool land near coastal areas that would otherwise be warmer

12. Density Serious Saltiness lab Summary:
If temperature goes down, density goes ____________.
If salinity goes up, density goes _________.

13. Upwelling
Cold, nutrient-rich water from the deep ocean rises to the surface, replacing warm surface water.
Caused by wind
Extremely important
for organisms

14. Currents and Temperature