The Warmest Year in History? How an El Nino works

After one of the most dispiriting winters in memory, we could use a break from the weather. Alas, the winds may not be blowing in our direction.

 As the below graphic shows, El Ninos recur every three to eight years, and it has been five years since the last one.  The conditions for an El Nino, which is characterized by consecutive months of particularly warm Pacific Ocean temperatures, were met last June. Then in February, Pacific trade winds began to stagnate, allowing the warm waters and storm clouds to drift east toward the Americas.

Predictions from meteorologists in Australia, Japan and the U.S. all recently increased their probability of an event this year, to as much as 70 percent. Aside from months of deluge in the U.S., the effects of an El Nino could include the warmest year on record, and then, if combined with further Arctic ice melt, a particularly cold winter in Europe.

When the strongest El Nino on record occurred in 1997-98, a 75-year-old Californian named Al Nino received angry phone calls demanding answers. If the rains come again this year, let’s hope people maintain better poise.


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