The current strong El Niño event has matured and will finish ranked among the top three strongest since 1950, according to the latest monthly outlook released by NOAA on Thursday.
El Niño conditions are likely to last through the winter before finally easing up and transitioning to neutral conditions by late spring or early summer. This means sea surface water temperatures in the equatorial central and eastern Pacific Ocean will return to near-average levels from their current above-average state. El Niño is an anomalous, yet periodic, warming of the central and eastern equatorial Pacific Ocean. For reasons still not well understood, every two to seven years, this patch of ocean warms for six to 18 months, then cools.
http://www.weather.com/news/climate/news/strong-el-nino-december-2015
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