“El Niño and La Niña are complex weather patterns resulting from variations in ocean temperatures in the Equatorial Pacific–officially known as the El Niño-Southern Oscillation (ENSO) cycle. These deviations from normal surface temperatures can have large-scale impacts not only on ocean processes, but also on global weather and climate.”
This short video from NOAA is an excellent summary that explains the ENSO cycle. The video has a particular emphasis on how changing patterns in the Pacific Ocean currents can impact weather patterns in various regions of the United States.
Tags: physical, weather and climate, regions, USA.
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