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The deglaciation of the Americas during the last glacial termination

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doi: 10.1016/j.earscirev.2020.103113
Authors:Palacios, David; Stokes, Chris R.; Phillips, Fred M.; Clague, John J.; Alcalá-Reygosa, Jesus; Andrés, Nuria; Angel, Isandra; Blard, Pierre-Henri; Briner, Jason P.; Hall, Brenda L.; Dahms, Dennis; Hein, Andrew S.; Jomelli, Vincent; Mark, Bryan G.; Martini, Mateo A.; Moreno, Patricio; Riedel, Jon; Sagredo, Esteban; Stansell, Nathan D.; Vázquez-Selem, Lorenzo; Vuille, Mathias; Ward, Dylan J.
Author Affiliations:Primary:
Complutense University, Department of Geography, Madrid, Spain
Durham University, Durham, United Kingdom
New Mexico Institute of Mining & Technology, Socorro, NM, United States
Simon Fraser University, Brtish Columbia, Canada
Universidad Nacional Autónoma de México, Caracas, Venezuela
Universidad Simón Bolivar, France
CNRS - Université de Lorraine, Bruxelles, Belgium
Université Libre de Bruxelles, Buffalo, NY, United States
University at Buffalo, Orono, ME, United States
University of Maine, Cedar Falls, IA, United States
University of Northern Iowa, Edinburgh, United Kingdom
University of Edinburgh, Meudon, France
Université Paris 1 Panthéon-Sorbonne, Columbus, OH, United States
Ohio State University, Chile
Universidad de Chile, Macul, Chile
Pontificia Universidad Católica de Chile, Argentina
Centro de Investigaciones en Ciencias de la Tierra (CONICET), Chile
Institute of Ecology and Biodiversity, Santiago, Chile
, SedroWoolley, WA, United States
U.S. National Park Service, Santiago, Chile
Millennium Nucleus Paleoclimate and Instituto de Geografia Pontificia Universidad Católica de Chile, DeKalb, IL, United States
Northern Illinois University, Albany, NY, United States
State University of New York (SUNY), Cincinnati, OH, United States
University of Cincinnati
Volume Title:Earth-Science Reviews
Source:Earth-Science Reviews, Vol.203. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-8252
Publication Date:2020
Note:In English. 560 refs.; illus., incl. sketch maps, 4 tables
Summary: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 Bolling-Allerod 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 South America (Venezuela) during the Younger Dryas (12.9-11.7 ka), but glaciers in central and southern South America retreated during this period, except on the Altiplano where advances were driven by an increase in precipitation. Taken together, we suggest that there was a climate compensation effect, or 'seesaw', between the hemispheres, which affected not only marine currents and atmospheric circulation, but also the behavior of glaciers. This seesaw is consistent with the opposing behavior of many glaciers in the Northern and Southern Hemispheres.
Subjects:Atmospheric precipitation; Cenozoic; Chronology; Deglaciation; Glaciers; Holocene; Last glacial maximum; Paleoclimatology; Pleistocene; Quaternary; Temperature; Upper Pleistocene; America; Central America; North America; South America; Heinrich Stadial
Coordinates:S600000 N900000 W0350000 W1700000
Record ID:878617-22
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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