Understanding El Niño phenomenon
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Questions and Answers

What occurs when the usual trade winds weaken in the tropical Pacific?

  • More upwelling of cold water on the eastern side of the ocean
  • No impact on the distribution of warm and cold water
  • Less push of warm surface water to the western side of the ocean (correct)
  • More push of warm surface water to the western side of the ocean

    • What contributes to the cancellation of the normal temperature difference in the tropical Pacific?

  • Weakened trade winds (correct)
  • Increase in upwelling of cold water on the eastern side
  • Strengthened trade winds
  • Decrease in rainfall patterns over the equatorial Pacific

    • What is a potential impact of El Niño around the tropics?

  • Decrease in the risk of droughts in Indonesia
  • Increase in the risk of floods in Peru (correct)
  • Decrease in the risk of floods in Peru
  • Increase in the risk of droughts in Indonesia

    • What happens during La Niña in the tropical Pacific?

    <p>Pushes the warmest water to the far western part of the tropical Pacific</p> Signup and view all the answers

    What is a consequence of El Niño on global temperatures?

    <p>Temporarily pushes up global temperatures</p> Signup and view all the answers

    What is the main cause of El Niño phenomenon?

    <p>Piling up of warm water in the western side of the ocean</p> Signup and view all the answers

    What effect does El Niño have on global temperatures?

    <p>Raises global temperatures</p> Signup and view all the answers

    Which ocean experiences consistent trade winds that push warm water from east to west?

    <p>Pacific Ocean</p> Signup and view all the answers

    What causes the warmer water to pile up on the western side of the Pacific Ocean?

    <p>Trade winds blowing from west to east</p> Signup and view all the answers

    What effect does the temperature difference across the tropical Pacific have on air and weather patterns?

    <p>Creates more unsettled weather with more cloud and rainfall</p> Signup and view all the answers

    Study Notes

    El Niño and La Niña

    • Weakening of the usual trade winds in the tropical Pacific leads to El Niño.
    • Cancellation of the normal temperature difference in the tropical Pacific occurs when the trade winds weaken, allowing warmer water to flow back towards the east.

    El Niño Impacts

    • Around the tropics, El Niño can lead to droughts in some regions and heavy rainfall in others.
    • El Niño causes a rise in global temperatures, making it a warming phenomenon.

    La Niña

    • During La Niña, the trade winds strengthen, and the cold water is pushed towards the surface, making the eastern Pacific even cooler.

    Cause of El Niño

    • The main cause of El Niño is the weakening of the trade winds, which allows the warmer water to flow back towards the east.

    Ocean Currents

    • The Pacific Ocean experiences consistent trade winds that push warm water from east to west.
    • The trade winds cause the warmer water to pile up on the western side of the Pacific Ocean.

    Temperature Difference Impacts

    • The temperature difference across the tropical Pacific has a significant impact on air and weather patterns, influencing global climate conditions.

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    Description

    Test your knowledge about the El Niño phenomenon, its impact on global weather patterns, and the underlying atmospheric and oceanic conditions. Learn about the factors contributing to the occurrence of El Niño and its implications for different regions.

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