LiveScience: A new and rare ice core record of tropical temperatures highlights changes in the enfants terribles of world climate, the El Nio/La NiaSouthern Oscillation.
The climate record comes from Peru's stunning Cordillera Oriental mountain range, home to Quelccaya, the world's largest tropical ice cap. Researchers trekked to an altitude of more than 18,000 feet (5,600 meters) to probe the ice.
The two ice cores (or cylinders of ice) drilled from the Quelccaya hold 1,800 years of climate history,...