How Does the Ocean Currents Affect Global Climate?

The Big Picture

Ocean currents are like rivers in the sea, they move warm or cold water across the globe. Imagine you're wearing a jacket that makes you feel warm, and then you take it off when you're cold. That’s kind of what ocean currents do to places far away.

Warm currents, like the Gulf Stream, carry heat from the tropics toward Europe, making countries like Britain warmer than they would be otherwise. Cold currents, like the Peru Current, bring chilly water up from deep in the ocean, sometimes causing places like Peru to get cooler or drier weather.

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Examples

  1. Imagine a warm bath, that’s like the Gulf Stream bringing warmth to places far away.
  2. A cold drink on a hot day is like a cold current cooling down a coastal region.
  3. If you live near the ocean, you might notice your local weather changing depending on which current brings water your way.

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