currents & climate earth’s waters chapter 4.4 pages 134-140

Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

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Currents & Climate

Earth’s Waters Chapter 4.4Pages 134-140

Go With the Flow

• Currents: a large stream of moving water that flows through the ocean– Carry water great

distances– Occur at varying

depths

Page 3: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

Surface Currents

• Surface currents affect water to a depth of several hundred meters– Driven mainly by

wind

• Move in circular pattern due to Coriolis Effect, caused by Earth’s rotation.

Page 4: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

Page 5: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

The Gulf Stream

Page 6: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

Deep Currents

• Deep Currents are caused by differences in density, not wind

1. Warm surface water flows to poles

2. Cools and sinks3. Flows back

towards equator.

Page 7: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

Climate• Climate is the

pattern of temperature and precipitation typical of an area over a long period of time

• Currents affect climate by cooling / warming air above them.

Page 8: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

Upwelling

• Upwelling is the upward movement of cold water from the deep

• Caused when wind pushes warm surface water away

• Deep water brings with it valuable nutrients.

Page 9: Currents & Climate Earth’s Waters Chapter 4.4 Pages 134-140

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