Earth’s Waters Chapter 4.4 Pages

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Presentation transcript:

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

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.

The Gulf Stream

Deep Currents Deep Currents are caused by differences in density, not wind Warm surface water flows to poles Cools and sinks Flows back towards equator.

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.

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.

El Nino