IN: How does temperate affect ocean currents? Deep Ocean Currents 3/31/15 14-1b pgs. 368-371 IN: How does temperate affect ocean currents?

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

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

Great Ocean Conveyor Belt

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

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)

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

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.

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

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

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

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