Choose one region on the world map. How does the climate there differ during El Niño and La Niña?

United States

The jet stream is oriented from west to east across the southern portion of the United States, during El Niño. Although El Niño's strongest impacts are felt around the equatorial Pacific, they can affect weather around the world by influencing high and low pressure systems, winds and precipitation. And as the warmer ocean waters release excess energy (heat) into the atmosphere, global temperatures rise.

During La Niña, the jet stream and severe weather are likely to be farther north. It refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.

El Niño and La Niña result from interaction between the surface of the ocean and the atmosphere in the tropical Pacific. Changes in the ocean impact the atmosphere and climate patterns around the globe. In turn, changes in the atmosphere impact the ocean temperatures and currents.

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