Articles | Volume 20, issue 8
https://doi.org/10.5194/cp-20-1861-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-20-1861-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Late Quaternary glacial maxima in southern Patagonia: insights from the Lago Argentino glacier lobe
Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN), Universidad Nacional de Córdoba, Av. Haya de la Torre, Córdoba, X5000HUA, Argentina
Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Córdoba, X5000IND, Argentina
Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706, USA
Shanti B. Penprase
Department of Earth & Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55455, USA
Maximillian S. Van Wyk de Vries
Department of Earth & Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55455, USA
School of Environmental Sciences, University of Liverpool, Liverpool, L3 5DA, UK
School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, UK
School of Geography, University of Nottingham, Nottingham, NG7 2RD, UK
Department of Geography, University of Cambridge, Cambridge, CB2 3EL, UK
Department of Earth Sciences, University of Cambridge, Cambridge, CB3 0EZ, UK
Andrew D. Wickert
Department of Earth & Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Saint Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55455, USA
Geomorphologie, Deutsches GeoForschungsZentrum (GFZ), 14473 Potsdam, Germany
Andrew G. Jones
Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706, USA
Shaun A. Marcott
Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706, USA
Jorge A. Strelin
Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Córdoba, X5000IND, Argentina
Departamento de Geología, Instituto Antártico Argentino, B1650 Buenos Aires, Argentina
Mateo A. Martini
Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN), Universidad Nacional de Córdoba, Av. Haya de la Torre, Córdoba, X5000HUA, Argentina
Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Córdoba, X5000IND, Argentina
Tammy M. Rittenour
Department of Geosciences, Utah State University, Logan, UT 84322, USA
Guido Brignone
Facultad de Ciencias Exactas, Físicas y Naturales (FCEFyN), Universidad Nacional de Córdoba, Av. Haya de la Torre, Córdoba, X5000HUA, Argentina
Mark D. Shapley
Continental Scientific Drilling Facility, Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Emi Ito
Department of Earth & Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Continental Scientific Drilling Facility, Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, USA
Kelly R. MacGregor
Department of Geology, Macalester College, Saint Paul, MN 55105, USA
Marc W. Caffee
Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA
Department of Earth, Atmospheric, and Planetary Science, Purdue University, West Lafayette, IN 47907, USA
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Co-editor-in-chief
Romero et al. mapped geomorphological features on the landscape and dated moraine boulders and outwash sediments to constrain past changes of the former Patagonian Ice Sheet in southern Argentina. They show that the Lago Argentino glacier expanded during Marine Isotope Stage 6 (153.0±14.7 ka) and during Marine Isotope Stage 3, culminating at 44.5±8.0 ka and at 36.6±1.0 ka, thus preceding the Last Glacial Maximum. They hypothesize that this was a result of longer and colder winters, as well as increased precipitation resulting from an equatorward shift of the Southern Hemisphere Westerlies.
Romero et al. mapped geomorphological features on the landscape and dated moraine boulders and...
Short summary
Investigating past glaciated regions is crucial for understanding how ice sheets responded to climate forcings and how they might respond in the future. We use two independent dating techniques to document the timing and extent of the Lago Argentino glacier lobe, a former lobe of the Patagonian Ice Sheet, during the late Quaternary. Our findings highlight feedbacks in the Earth’s system responsible for modulating glacier growth in the Southern Hemisphere prior to the global Last Glacial Maximum.
Investigating past glaciated regions is crucial for understanding how ice sheets responded to...