Read here. Computer programmers purposefully coded the climate model simulations to produce ENSO events that increased both in frequency and intensity, with stronger El Niños leading to more severe weather results. This was done in the belief that human CO2-induced global warming would produce such results. Unfortunately for the IPCC and its climate modelers, these simulated climate predictions were wrong.
The scientists who developed the Multivariate ENSO Index (MEI) refined and expanded their research to extend the MEI capabilities back to the 1870s. By doing so, they were able to analyze earlier ENSO events as compared to those of the modern era. Their work confirmed that today's El Niños and La Niñas are no different than those of a hundred years ago.
"...the two U.S. researchers describe their efforts "to boil the MEI concept down to its most essential components to enable historical analyses that more than double its period of record,"... "designed to help...differentiate between 'natural' ENSO behavior in all its rich facets, and the 'Brave New World' of this phenomenon under evolving greenhouse gas-related climate conditions.""...report that "the new MEI.ext confirms that ENSO activity went through a lull in the early- to mid-20th century, but was just about as prevalent one century ago as in recent decades." In fact, they state that "so far, none of the behavior of recent ENSO events appears unprecedented, including duration, onset timing, and spacing in the last few decades compared to a full century before then"...So far, there is no indication of the "fingerprint of man" in any aspect of ENSO behavior over the last few decades..." [Klaus Wolter, Michael S. Timlin 2011: International Journal of Climatology]
Previous failed-prediction, ocean-oscillation and peer-reviewed postings.