Natural climate cycles are intensifying
§Warmer
ocean temperatures are believed to be increasing the intensity and frequency of
El Niño-Southern Oscillation.
§An El Niño event
occurs when above average sea temperatures exist in the eastern Pacific, which
generates large rainfall in the eastern Pacific and central United States and
droughts in Australia and Central America during the Northern Hemisphere
summer.
§La Niña events happen when there are lower
than normal sea temperatures in the eastern Pacific, inducing warm and dry
weather in central U.S. and large amounts of rainfall in Australia during the
Northern Hemisphere winter.
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