As a geologist long interested in climatic cycles, I had long ago rejected the Mann curve as an unsuitable representation of late Holocene climatic variation. (climateaudit.org)
«About 60 % of the warming observed from 1970 to 2000 was very likely caused by the above natural 60 - year climatic cycle during its warming phase.» (skepticalscience.com)
The phenomenon in question is the El Niño — Southern Oscillation, or ENSO, a global climatic cycle that affects both sides of the tropical Pacific Ocean and beyond. (sciencemag.org)