The deglaciation of the Americas during the Last Glacial Termination

• Published in: Earth-Science Reviews
• Main Authors: Palacios, David, Stokes, Chris, Phillips, Fred, Clague, John, Alcalá-Reygosa, Jesús, Andrés, Nuria, Angel, Isandra, Blard, Pierre-Henri, Briner, Jason, Hall, Brenda, Dahms, Dennis, Hein, Andrew, Jomelli, Vincent, Mark, Bryan, Martini, Mateo, Moreno, Patricio, Riedel, Jon, Sagredo, Esteban, Stansell, Nathan, Vázquez-Selem, Lorenzo, Vuille, Mathias, Ward, Dylan
• Other Authors: Universidad Complutense de Madrid = Complutense University of Madrid Madrid (UCM), Durham University, New Mexico Institute of Mining and Technology New Mexico Tech (NMT), Simon Fraser University (SFU.ca), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Universidad Simon Bolivar (USB), Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Glaciologie Bruxelles, Université libre de Bruxelles (ULB), University at Buffalo SUNY (SUNY Buffalo), State University of New York (SUNY), University of Maine, University of Northern Iowa (UNI), University of Edinburgh, Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP), Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Ohio State University Columbus (OSU), Universidad de Chile = University of Chile Santiago (UCHILE), Pontificia Universidad Católica de Chile (UC), Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET), National Park Service, Northern Illinois University, University at Albany SUNY, University of Cincinnati (UC)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: [SDE]Environmental Sciences; [SDE.MCG]Environmental Sciences/Global Changes; Antarctic; Patagonia; The Antarctic; Antarc*; Tierra del Fuego
• Online Access: https://hal-cnrs.archives-ouvertes.fr/hal-02627368; https://hal-cnrs.archives-ouvertes.fr/hal-02627368/document; https://hal-cnrs.archives-ouvertes.fr/hal-02627368/file/Palacios%20ESR%202020.pdf; https://doi.org/10.1016/j.earscirev.2020.103113

International audience This paper reviews current understanding of deglaciation in North, Central and South America from the Last Glacial Maximum to the beginning of the Holocene. Together with paleoclimatic and paleoceanographic data, we compare and contrast the pace of deglaciation and the response of glaciers to major climate events. During the Global Last Glacial Maximum (GLGM, 26.5-19 ka), average temperatures decreased 4°to 8°C in the Americas, but precipitation varied strongly throughout this large region. Many glaciers in North and Central America achieved their maximum extent during the GLGM, whereas others advanced even farther during the subsequent Heinrich Stadial 1 (HS-1). Glaciers in the Andes also expanded during the GLGM, but that advance was not the largest, except on Tierra del Fuego. HS-1 (17.5-14.6 ka) was a time of general glacier thickening and advance throughout most of North and Central America, and in the tropical Andes; however, glaciers in the temperate and subpolar Andes thinned and retreated during this period. During the Bølling-Allerød interstadial (B-A, 14.6-12.9 ka), glaciers retreated throughout North and Central America and, in some cases, completely disappeared. Many glaciers advanced during the Antarctic Cold Reversal (ACR, 14.6-12.9 ka) in the tropical Andes and Patagonia. There were small advances of glaciers in North America, Central America and in northern