The Peruvian ice core appears to show the influence of El Nino changes at sea. This gives us a new way to study temperature fluctuations in part of the Pacific Ocean over nearly two millennia.
Climate is complex and a great deal of effort is required to learn how it has varied in Earth’s past. But step-by-step we are learning a great deal more than we knew when this Rock Doc first read about the Ice Age in elementary school.
Dr. E. Kirsten Peters is the author of “Planet Rock Doc.” She can be reached at rockdoc.wsu.edu and on Twitter @RockDocWSU.