Reports

The Little Ice Age as Recorded in the Stratigraphy of the Tropical Quelccaya Ice Cap

Science  17 Oct 1986:
Vol. 234, Issue 4774, pp. 361-364
DOI: 10.1126/science.234.4774.361

Abstract

The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent. Annual variations in visible dust layers, oxygen isotopes, microparticle concentrations, conductivity, and identification of the historical (A.D. 1600) Huaynaputina ash permit accurate dating and time-scale verification. The fact that the Little Ice Age (about A.D. 1500 to 1900) stands out as a significant climatic event in the oxygen isotope and electrical conductivity records confirms the worldwide character of this event.

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