There is an interesting video that explains the La Nina/El Nino cycle.http://thinkprogress.org/climate/2014/05/08/3435638/el-nino-global-warming/
By Joe Romm May 8, 2014
The chances of an El Niño developing this year are now at almost 4 out of 5. The chart above from NASA makes clear El Niños are generally the hottest years on record — since the regional warming adds to the underlying man-made global trend.
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If this El Niño does start fairly quickly and become quite strong, as many currently expect, then 2014 could well become the hottest year on record, and 2015 would likely break all previous global records.
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Australian climate expert Dr. Wenju Cai says the ocean data suggest this will become one of the strongest El Niños in decades. If so, then in addition to record temperatures, we can expect off-the-charts extreme weather. As the U.K. Royal Society and Met Office explained a few years ago, “We expect some of the most significant impacts of climate change to occur when natural variability is exacerbated by long-term global warming.”
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