Early warming of tropical South America at the last glacial-interglacial transition.

Published

Journal Article

Glaciation in the humid tropical Andes is a sensitive indicator of mean annual temperature. Here, we present sedimentological data from lakes beyond the glacial limit in the tropical Andes indicating that deglaciation from the Last Glacial Maximum led substantial warming at high northern latitudes. Deglaciation from glacial maximum positions at Lake Titicaca, Peru/Bolivia (16 degrees S), and Lake Junin, Peru (11 degrees S), occurred 22,000 to 19,500 calendar years before the present, several thousand years before the Bølling-Allerød warming of the Northern Hemisphere and deglaciation of the Sierra Nevada, United States (36.5 degrees to 38 degrees N). The tropical Andes deglaciated while climatic conditions remained regionally wet, which reflects the dominant control of mean annual temperature on tropical glaciation.

Full Text

Duke Authors

Cited Authors

  • Seltzer, GO; Rodbell, DT; Baker, PA; Fritz, SC; Tapia, PM; Rowe, HD; Dunbar, RB

Published Date

  • May 2002

Published In

Volume / Issue

  • 296 / 5573

Start / End Page

  • 1685 - 1686

PubMed ID

  • 12040193

Pubmed Central ID

  • 12040193

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1070136

Language

  • eng