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What are ocean currents?

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Quick answer

Ocean currents are large, continuous flows of seawater driven by wind, temperature, salt, and Earth's rotation. They move heat around the globe, shaping climates — like the Gulf Stream warming Western Europe — and carrying nutrients that support marine life.

Key things to understand

  1. They're steady, large-scale flows of seawater.
  2. Driven by wind, heat, salinity, and Earth's spin.
  3. They redistribute heat and shape regional climates.
  4. They carry nutrients vital to marine ecosystems.

People also ask

What are ocean currents?
Large, continuous movements of seawater driven by wind, temperature, salinity, and Earth's rotation.
Why do ocean currents matter?
They move heat around the planet, shaping climates and supporting marine life with nutrients.
What is the Gulf Stream?
A powerful warm current that carries heat from the tropics, helping keep Western Europe mild.

Part of the guide: Water & Weather Phenomena →