Portal de Periódicos da CAPES

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

1986; American Association for the Advancement of Science; Volume: 234; Issue: 4774 Linguagem: Inglês

10.1126/science.234.4774.361

1095-9203

Lonnie G. Thompson, Ellen Mosley‐Thompson, W. Dansgaard, Pieter Meiert Grootes,

Cryospheric studies and observations

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.