1. IN: How does temperate affect ocean currents?
Deep Ocean Currents 3/31/15
14-1b pgs
IN: How does temperate affect ocean currents?

2. Temperature
Warm-water currents carry water away from the equator and cold-water currents carry water away from the poles.
N. Pole
Equator
S. Pole

4. Deep Currents – streamlike movements of ocean water far below the surface.

5. Great Ocean Conveyor Belt

6. Deep ocean currents form in parts of the ocean where water density increases.

7. Increase in density by: Decreasing Temperature (cold sinks)
How Deep Currents Form
Increase in density by:
Decreasing Temperature (cold sinks)
Increasing Salinity Through Freezing
Increasing Salinity Through Evaporation
(salt doesn’t evaporate and glaciers are fresh water)

9. Increase in density by: Decreasing Temperature
How Deep Currents Form
Increase in density by:
Decreasing Temperature
Increasing Salinity Through Freezing
Increasing Salinity Through Evaporation

10. Surface Currents and Climate
Surface currents greatly affect the climate in many parts of the world.
Some currents warm or cool coastal areas year-round.
Some currents change their circulation pattern.
This causes changes in the atmosphere that disrupt the climate in many parts of the world.

11. Warm-water currents create warmer climates.
Gulf Stream Current
Warm-water currents create warmer climates.

12. Cold-water currents create cooler climates.
California Current
Cold-water currents create cooler climates.

13. Current Variations
El Nino – the periodic change in the location of warm and cool surface waters in the Pacific Ocean.

15. OUT: How might a change in ocean currents change an areas climate?