date:Aug 12, 2014
ng the coast of Peru. Combining layers of shells from each site gives water temperatures for intervals spanning 100 to 1,000 years during the past 10,000 years.
The new record shows that 10,000 years ago the El Nio cycles were strong, contradicting the current leading interpretations. Roughly 7,000 years ago the shells show a shift to the central Pacific of the most severe El Nio impacts, followed by a lull in the strength and occurrence of El Nio from about 6,000 to 4,000 years ago.
One possi