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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Adrian M. Bender, Richard O. Lease, Lee B. Corbett, Paul R. Bierman, Marc W. Caffee, James V. Jones, and Doug Kreiner
Earth Surf. Dynam., 10, 1041–1053, https://doi.org/10.5194/esurf-10-1041-2022, https://doi.org/10.5194/esurf-10-1041-2022, 2022
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Maximillian Van Wyk de Vries, Shashank Bhushan, Mylène Jacquemart, César Deschamps-Berger, Etienne Berthier, Simon Gascoin, David E. Shean, Dan H. Shugar, and Andreas Kääb
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Mae Kate Campbell, Paul R. Bierman, Amanda H. Schmidt, Rita Sibello Hernández, Alejandro García-Moya, Lee B. Corbett, Alan J. Hidy, Héctor Cartas Águila, Aniel Guillén Arruebarrena, Greg Balco, David Dethier, and Marc Caffee
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Maximillian Van Wyk de Vries, Emi Ito, Mark Shapley, Matias Romero, and Guido Brignone
Clim. Past Discuss., https://doi.org/10.5194/cp-2022-29, https://doi.org/10.5194/cp-2022-29, 2022
Manuscript not accepted for further review
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Brendon J. Quirk, Elizabeth Huss, Benjamin J. C. Laabs, Eric Leonard, Joseph Licciardi, Mitchell A. Plummer, and Marc W. Caffee
Clim. Past, 18, 293–312, https://doi.org/10.5194/cp-18-293-2022, https://doi.org/10.5194/cp-18-293-2022, 2022
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Glaciers in the northern Rocky Mountains began retreating 17 000 to 18 000 years ago, after the end of the most recent global ice volume maxima. Climate in the region during this time was likely 10 to 8.5° colder than modern with less than or equal to present amounts of precipitation. Glaciers across the Rockies began retreating at different times but eventually exhibited similar patterns of retreat, suggesting a common mechanism influencing deglaciation.
Maximillian Van Wyk de Vries and Andrew D. Wickert
The Cryosphere, 15, 2115–2132, https://doi.org/10.5194/tc-15-2115-2021, https://doi.org/10.5194/tc-15-2115-2021, 2021
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Richard Barnes, Kerry L. Callaghan, and Andrew D. Wickert
Earth Surf. Dynam., 9, 105–121, https://doi.org/10.5194/esurf-9-105-2021, https://doi.org/10.5194/esurf-9-105-2021, 2021
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Existing ways of modeling the flow of water amongst landscape depressions such as swamps and lakes take a long time to run. However, as our previous work explains, depressions can be quickly organized into a data structure – the depression hierarchy. This paper explains how the depression hierarchy can be used to quickly simulate the realistic filling of depressions including how they spill over into each other and, if they become full enough, how they merge into one another.
Nicolás E. Young, Alia J. Lesnek, Josh K. Cuzzone, Jason P. Briner, Jessica A. Badgeley, Alexandra Balter-Kennedy, Brandon L. Graham, Allison Cluett, Jennifer L. Lamp, Roseanne Schwartz, Thibaut Tuna, Edouard Bard, Marc W. Caffee, Susan R. H. Zimmerman, and Joerg M. Schaefer
Clim. Past, 17, 419–450, https://doi.org/10.5194/cp-17-419-2021, https://doi.org/10.5194/cp-17-419-2021, 2021
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Retreat of the Greenland Ice Sheet (GrIS) margin is exposing a bedrock landscape that holds clues regarding the timing and extent of past ice-sheet minima. We present cosmogenic nuclide measurements from recently deglaciated bedrock surfaces (the last few decades), combined with a refined chronology of southwestern Greenland deglaciation and model simulations of GrIS change. Results suggest that inland retreat of the southwestern GrIS margin was likely minimal in the middle to late Holocene.
Richard Barnes, Kerry L. Callaghan, and Andrew D. Wickert
Earth Surf. Dynam., 8, 431–445, https://doi.org/10.5194/esurf-8-431-2020, https://doi.org/10.5194/esurf-8-431-2020, 2020
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Maps of elevation are used to help predict the flow of water so we can better understand landslides, floods, and global climate change. However, modeling the flow of water is difficult when elevation maps include swamps, lakes, and other depressions. This paper explains a new method that overcomes these difficulties, allowing models to run faster and more accurately.
Sara Savi, Stefanie Tofelde, Andrew D. Wickert, Aaron Bufe, Taylor F. Schildgen, and Manfred R. Strecker
Earth Surf. Dynam., 8, 303–322, https://doi.org/10.5194/esurf-8-303-2020, https://doi.org/10.5194/esurf-8-303-2020, 2020
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Fluvial deposits record changes in water and sediment supply. As such, they are often used to reconstruct the tectonic or climatic history of a basin. In this study we used an experimental setting to analyze how fluvial deposits register changes in water or sediment supply at a confluence zone. We provide a new conceptual framework that may help understanding the construction of these deposits under different forcings conditions, information crucial to correctly inferring the history of a basin.
Kerry L. Callaghan and Andrew D. Wickert
Earth Surf. Dynam., 7, 737–753, https://doi.org/10.5194/esurf-7-737-2019, https://doi.org/10.5194/esurf-7-737-2019, 2019
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Lakes and swales are real landscape features but are generally treated as data errors when calculating water flow across a surface. This is a problem because depressions can store water and fragment drainage networks. Until now, there has been no good generalized approach to calculate which depressions fill and overflow and which do not. We addressed this problem by simulating runoff flow across a landscape, selectively flooding depressions and more realistically connecting lakes and rivers.
Stefanie Tofelde, Sara Savi, Andrew D. Wickert, Aaron Bufe, and Taylor F. Schildgen
Earth Surf. Dynam., 7, 609–631, https://doi.org/10.5194/esurf-7-609-2019, https://doi.org/10.5194/esurf-7-609-2019, 2019
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We performed seven physical experiments to explore terrace formation and sediment export from a braided alluvial river system that is perturbed by changes in water discharge, sediment supply, or base level. Each perturbation differently affects (1) the geometry of terraces and channels, (2) the timing of terrace formation, and (3) the transient response of sediment discharge. Our findings provide guidelines for interpreting fill terraces and sediment export from fluvial systems.
Andrew D. Wickert, Chad T. Sandell, Bobby Schulz, and Gene-Hua Crystal Ng
Hydrol. Earth Syst. Sci., 23, 2065–2076, https://doi.org/10.5194/hess-23-2065-2019, https://doi.org/10.5194/hess-23-2065-2019, 2019
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Measuring Earth's changing environment is a critical part of natural science, but to date most of the equipment to do so is expensive, proprietary, and difficult to customize. We addressed this challenge by developing and deploying the ALog, a low-power, lightweight, Arduino-compatible data logger. We present our hardware schematics and layouts, as well as our customizable code library that operates the ALog and helps users to link it to off-the-shelf sensors.
Leila Saberi, Rachel T. McLaughlin, G.-H. Crystal Ng, Jeff La Frenierre, Andrew D. Wickert, Michel Baraer, Wei Zhi, Li Li, and Bryan G. Mark
Hydrol. Earth Syst. Sci., 23, 405–425, https://doi.org/10.5194/hess-23-405-2019, https://doi.org/10.5194/hess-23-405-2019, 2019
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The relationship among glacier melt, groundwater, and streamflow remains highly uncertain, especially in tropical glacierized watersheds in response to climate. We implemented a multi-method approach and found that melt contribution varies considerably and may drive streamflow variability at hourly to multi-year timescales, rather than buffer it, as commonly thought. Some of the melt contribution occurs through groundwater pathways, resulting in longer timescale interactions with streamflow.
Andrew D. Wickert and Taylor F. Schildgen
Earth Surf. Dynam., 7, 17–43, https://doi.org/10.5194/esurf-7-17-2019, https://doi.org/10.5194/esurf-7-17-2019, 2019
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Rivers can raise or lower their beds by depositing or eroding sediments. We combine equations for flow, channel/valley geometry, and gravel transport to learn how climate and tectonics shape down-valley profiles of river-bed elevation. Rivers steepen when they receive more sediment (relative to water) and become straighter with tectonic uplift. Weathering and breakdown of gravel is needed to produce gradually widening river channels with concave-up profiles that are often observed in the field.
G.-H. Crystal Ng, Andrew D. Wickert, Lauren D. Somers, Leila Saberi, Collin Cronkite-Ratcliff, Richard G. Niswonger, and Jeffrey M. McKenzie
Geosci. Model Dev., 11, 4755–4777, https://doi.org/10.5194/gmd-11-4755-2018, https://doi.org/10.5194/gmd-11-4755-2018, 2018
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The profound importance of water has led to the development of increasingly complex hydrological models. However, implementing these models is usually time-consuming and requires specialized expertise, stymieing their widespread use to support science-driven decision-making. In response, we have developed GSFLOW–GRASS, a robust and comprehensive set of software tools that can be readily used to set up and execute GSFLOW, the U.S. Geological Survey's coupled groundwater–surface-water flow model.
Andrew D. Wickert
Earth Surf. Dynam., 4, 831–869, https://doi.org/10.5194/esurf-4-831-2016, https://doi.org/10.5194/esurf-4-831-2016, 2016
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The ice sheets that once spread across northern North America dramatically changed the drainage basin areas and discharges of rivers across the continent. As these ice sheets retreated, starting around 19 500 years ago, they sent meltwater to the oceans, influencing climate and building a geologic record of deglaciation. This record can be used to evaluate ice-sheet reconstructions and build an improved history and understanding of past ice-sheet collapse across North America.
Michael Sigl, Tyler J. Fudge, Mai Winstrup, Jihong Cole-Dai, David Ferris, Joseph R. McConnell, Ken C. Taylor, Kees C. Welten, Thomas E. Woodruff, Florian Adolphi, Marion Bisiaux, Edward J. Brook, Christo Buizert, Marc W. Caffee, Nelia W. Dunbar, Ross Edwards, Lei Geng, Nels Iverson, Bess Koffman, Lawrence Layman, Olivia J. Maselli, Kenneth McGwire, Raimund Muscheler, Kunihiko Nishiizumi, Daniel R. Pasteris, Rachael H. Rhodes, and Todd A. Sowers
Clim. Past, 12, 769–786, https://doi.org/10.5194/cp-12-769-2016, https://doi.org/10.5194/cp-12-769-2016, 2016
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Here we present a chronology (WD2014) for the upper part (0–2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide ice core, which is based on layer counting of distinctive annual cycles preserved in the elemental, chemical and electrical conductivity records. We validated the chronology by comparing it to independent high-accuracy, absolutely dated chronologies. Given its demonstrated high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere.
A. D. Wickert
Geosci. Model Dev., 9, 997–1017, https://doi.org/10.5194/gmd-9-997-2016, https://doi.org/10.5194/gmd-9-997-2016, 2016
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Earth's lithosphere bends beneath surface loads, such as ice, sediments, and mountain belts. The pattern of this bending, or flexural isostatic response, is a function of both the loads and the spatially variable strength of the lithosphere. gFlex is an easy-to-use program to calculate flexural isostastic response, and may be used to better understand how ice sheets, glaciers, large lakes, sedimentary basins, volcanoes, and other surface loads interact with the solid Earth.
B. W. Goodfellow, A. P. Stroeven, D. Fabel, O. Fredin, M.-H. Derron, R. Bintanja, and M. W. Caffee
Earth Surf. Dynam., 2, 383–401, https://doi.org/10.5194/esurf-2-383-2014, https://doi.org/10.5194/esurf-2-383-2014, 2014
Related subject area
Subject: Ice Dynamics | Archive: Terrestrial Archives | Timescale: Pleistocene
A Greenland-wide empirical reconstruction of paleo ice sheet retreat informed by ice extent markers: PaleoGrIS version 1.0
The Laurentide Ice Sheet in southern New England and New York during and at the end of the Last Glacial Maximum – A cosmogenic-nuclide chronology
Equilibrium line altitudes of alpine glaciers in Alaska suggest Last Glacial Maximum summer temperature was 2–5 °C lower than during the pre-industrial
A cosmogenic nuclide-derived chronology of pre-Last Glacial Cycle glaciations during MIS 8 and MIS 6 in northern Patagonia
Tancrède P. M. Leger, Christopher D. Clark, Carla Huynh, Sharman Jones, Jeremy C. Ely, Sarah L. Bradley, Christiaan Diemont, and Anna L. C. Hughes
Clim. Past, 20, 701–755, https://doi.org/10.5194/cp-20-701-2024, https://doi.org/10.5194/cp-20-701-2024, 2024
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Projecting the future evolution of the Greenland Ice Sheet is key. However, it is still under the influence of past climate changes that occurred over thousands of years. This makes calibrating projection models against current knowledge of its past evolution (not yet achieved) important. To help with this, we produced a new Greenland-wide reconstruction of ice sheet extent by gathering all published studies dating its former retreat and by mapping its past margins at the ice sheet scale.
Allie Balter-Kennedy, Joerg M. Schaefer, Greg Balco, Meredith A. Kelly, Michael R. Kaplan, Roseanne Schwartz, Bryan Oakley, Nicolás E. Young, Jean Hanley, and Arianna M. Varuolo-Clarke
EGUsphere, https://doi.org/10.5194/egusphere-2024-241, https://doi.org/10.5194/egusphere-2024-241, 2024
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We date sedimentary deposits indicating the southeastern Laurentide Ice Sheet was at or near its southernmost extent from ~26,000 to 21,000 years ago when sea-level was lowest and other climate records indicate glacial conditions. Slow deglaciation began ~22,000 years ago alongside a slow but steady rise in modeled local summer temperature, but significant deglaciation in the region did not begin until ~18,000 years ago when atmospheric CO2 began to rise, signaling the end of the last ice age.
Caleb K. Walcott, Jason P. Briner, Joseph P. Tulenko, and Stuart M. Evans
Clim. Past, 20, 91–106, https://doi.org/10.5194/cp-20-91-2024, https://doi.org/10.5194/cp-20-91-2024, 2024
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Available data suggest that Alaska was not as cold as many of the high-latitude areas of the Northern Hemisphere during the Last Ice Age. These results come from isolated climate records, climate models, and data synthesis projects. We used the extents of mountain glaciers during the Last Ice Age and Little Ice Age to show precipitation gradients across Alaska and provide temperature data from across the whole state. Our findings support a relatively warm Alaska during the Last Ice Age.
Tancrède P. M. Leger, Andrew S. Hein, Ángel Rodés, Robert G. Bingham, Irene Schimmelpfennig, Derek Fabel, Pablo Tapia, and ASTER Team
Clim. Past, 19, 35–59, https://doi.org/10.5194/cp-19-35-2023, https://doi.org/10.5194/cp-19-35-2023, 2023
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Over the past 800 thousand years, variations in the Earth’s orbit and tilt have caused antiphased solar insolation intensity in the Northern and Southern Hemispheres. Paradoxically, glacial records suggest that global ice sheets have responded synchronously to major cold glacial and warm interglacial episodes. To address this puzzle, we present a new detailed glacier chronology that estimates the timing of multiple Patagonian ice-sheet waxing and waning cycles over the past 300 thousand years.
Cited articles
Abe-Ouchi, A., Saito, F., Kawamura, K., Raymo, M. E., Okuno, J., Takahashi, K., and Blatter, H.: Insolation-driven 100,000-year glacial cycles and hysteresis of ice-sheet volume, Nature, 500, 190–193, https://doi.org/10.1038/nature12374, 2013. a
Anderson, R. F., Ali, S., Bradtmiller, L. I., Nielsen, S. H., Fleisher, M. Q., Anderson, B. E., and Burckle, L. H.: Wind-driven upwelling in the southern ocean and the deglacial rise in atmospheric CO2, Science, 323, 1443–1448, https://doi.org/10.1126/SCIENCE.1167441, 2009. a
Auclair, M., Lamothe, M., and Huot, S.: Measurement of anomalous fading for feldspar IRSL using SAR, Radiat. Meas., 37, 487–492, https://doi.org/10.1016/S1350-4487(03)00018-0, 2003. a, b
Balco, G., Stone, J. O., Lifton, N. A., and Dunai, T. J.: A complete and easily accessible means of calculating surface exposure ages or erosion rates from 10Be and 26Al measurements, Quat. Geochronol., 3, 174–195, https://doi.org/10.1016/j.quageo.2007.12.001, 2008. a
Berger, A. and Loutre, M.: Insolation values for the climate of the last 10 million years, Quaternary Sci. Rev., 10, 297–317, https://doi.org/10.1016/0277-3791(91)90033-Q, 1991. a
Blomdin, R., Murray, A., Thomsen, K. J., Buylaert, J.-P., Sohbati, R., Jansson, K. N., and Alexanderson, H.: Timing of the deglaciation in southern Patagonia: Testing the applicability of K-Feldspar IRSL, Quat. Geochronol., 10, 264–272, 2012. a
Brennan, B. J.: Beta doses to spherical grains, Radiat. Meas., 37, 299–303, https://doi.org/10.1016/S1350-4487(03)00011-8, 2003. a
Caldenius, C. C.: Las Glaciaciones Cuaternarias en la Patagonia y Tierra del Fuego, Geogr. Ann., 14, 1–164, https://doi.org/10.2307/519583, 1932. a, b
Casadio, S., Feldmann, R. M., and Foland, K. A.: 40Ar/39Ar age and oxygen isotope temperature of the Centinela Formation, southwestern Argentina: An Eocene age for crustacean-rich “Patagonian” beds, J. S. Am. Earth Sci., 13, 123–132, https://doi.org/10.1016/S0895-9811(00)00013-4, 2000. a
Ceperley, E. G., Marcott, S. A., Reusche, M. M., Barth, A. M., Mix, A. C., Brook, E. J., and Caffee, M.: Widespread early Holocene deglaciation, Washington Land, northwest Greenland, Quaternary Sci. Rev., 231, 106181, https://doi.org/10.1016/j.quascirev.2020.106181, 2020. a
Chandler, B. M. P., Lovell, H., Boston, C. M., Lukas, S., Barr, I. D., Benediktsson, I. O., Benn, D. I., Clark, C. D., Darvill, C. M., Evans, D. J. A., Ewertowski, M. W., Loibl, D., Margold, M., Otto, J.-C., Roberts, D. H., Stokes, C. R., Storrar, R. D., and Stroeven, A. P.: Glacial geomorphological mapping: A review of approaches and frameworks for best practice, Earth-Sci. Rev., 185, 806–846, https://doi.org/10.1016/j.earscirev.2018.07.015, 2018. a
Çiner, A., Sarıkaya, M. A., Yıldırım, C., Girault, I., Todisco, D., Martin, F., Borrero, L., and Fabel, D.: Terrestrial cosmogenic 10Be dating of the Última Esperanza ice lobe moraines (52° S, Patagonia) indicates the global Last Glacial Maximum (LGM) extent was half of the local LGM, Geomorphology, 414, 108381, https://doi.org/10.1016/j.geomorph.2022.108381, 2022. a
Clague, J. J., Barendregt, R. W., Menounos, B., Roberts, N. J., Rabassa, J., Martinez, O., Ercolano, B., Corbella, H., and Hemming, S. R.: Pliocene and Early Pleistocene glaciation and landscape evolution on the Patagonian Steppe, Santa Cruz province, Argentina, Quaternary Sci. Rev., 227, 105992, https://doi.org/10.1016/j.quascirev.2019.105992, 2020. a, b
Clark, P. U., Dyke, A. S., Shakun, J. D., Carlson, A. E., Clark, J., Wohlfarth, B., Mitrovica, J. X., Hostetler, S. W., and Mccabe, A. M.: The Last Glacial Maximum, Science, 325, 3–7, https://doi.org/10.1126/science.1172873, 2009. a
Cooper, E.-L., Thorndycraft, V. R., Davies, B. J., Palmer, A. P., and García, J.-L.: Glacial geomorphology of the former Patagonian Ice Sheet (44–46° S), J. Maps, 17, 661–681, https://doi.org/10.1080/17445647.2021.1986158, 2021. a
Darvill, C. M., Bentley, M. J., Stokes, C. R., and Shulmeister, J.: The timing and cause of glacial advances in the southern mid-latitudes during the last glacial cycle based on a synthesis of exposure ages from Patagonia and New Zealand, Quaternary Sci. Rev., 149, 200–214, https://doi.org/10.1016/j.quascirev.2016.07.024, 2016. a, b, c, d, e, f, g
Darvill, C. M., Stokes, C. R., Bentley, M. J., Evans, D. J. A., and Lovell, H.: Dynamics of former ice lobes of the southernmost Patagonian Ice Sheet based on a glacial landsystems approach, J. Quatern. Sci., 32, 857–876, https://doi.org/10.1002/jqs.2890, 2017. a
Darwin, C.: On the Distribution of the Erratic Boulders and on the Contemporaneous Unstratified Deposits of South America, Transactions of the Geological Society of London, 6, 415–431, https://doi.org/10.1144/transgslb.6.2.415, 1842. a
Davies, B. J., Darvill, C. M., Lovell, H., Bendle, J. M., Dowdeswell, J. A., Fabel, D., García, J.-L., Geiger, A., Glasser, N. F., Gheorghiu, D. M., Harrison, S., Hein, A. S., Kaplan, M. R., Martin, J. R. V., Mendelova, M., Palmer, A., Pelto, M., Rodés, A., Sagredo, E. A., Smedley, R. K., Smellie, J. L., and Thorndycraft, V. R.: The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE), Earth-Sci. Rev., 204, 103152, https://doi.org/10.1016/j.earscirev.2020.103152, 2020. a, b, c, d, e
De Geer, G.: Late Glacial Clay Varves in Argentina: Measured by Dr Carl Caldenius, Dated and Connected with the Solar Curve Through the Swedish Timescale, Geogr. Ann., 9, 1–8, https://doi.org/10.1080/20014422.1927.11881142, 1927. a
Denton, G. H., Lowell, T., Heusser, C., Schlüchter, C., Andersen, B., Heusser, L. E., Moreno, P., and Marchant, D.: Geomorphology, Stratigraphy, and Radiocarbon Chronology of LlanquihueDrift in the Area of the Southern Lake District, Seno Reloncaví, and Isla Grande de Chiloé, Chile, Geogr. Ann. A, 81, 167–229, https://doi.org/10.1111/1468-0459.00057, 1999. a, b
Denton, G. H., Putnam, A. E., Russell, J. L., Barrell, D. J. A., Schaefer, J. M., Kaplan, M. R., and Strand, P. D.: The Zealandia Switch: Ice age climate shifts viewed from Southern Hemisphere moraines, Quaternary Sci. Rev., 257, 106771, https://doi.org/10.1016/j.quascirev.2020.106771, 2021. a
Doughty, A. M., Schaefer, J. M., Putnam, A. E., Denton, G. H., Kaplan, M. R., Barrell, D. J., Andersen, B. G., Kelley, S. E., Finkel, R. C., and Schwartz, R.: Mismatch of glacier extent and summer insolation in Southern Hemisphere mid-latitudes, Geology, 43, 407–410, https://doi.org/10.1130/G36477.1, 2015. a, b, c
Douglass, D. C., Singer, B. S., Kaplan, M. R., Mickelson, D. M., and Caffee, M. W.: Cosmogenic nuclide surface exposure dating of boulders on last-glacial and late-glacial moraines, Lago Buenos Aires, Argentina: Interpretive strategies and paleoclimate implications, Quat. Geochronol., 1, 43–58, https://doi.org/10.1016/j.quageo.2006.06.001, 2006. a, b
Durcan, J. A., King, G. E., and Duller, G. A. T.: DRAC: Dose Rate and Age Calculator for trapped charge dating, Quat. Geochronol., 28, 54–61, https://doi.org/10.1016/j.quageo.2015.03.012, 2015. a
Feruglio, E.: Estudios geológicos y glaciológicos en la región del Lago Argentino (Patagonia), Boletín Academia Nacional de Ciencias, Córdoba, Argentina, 37, 1–208, 1944. a
Fogwill, C., Turney, C., Hutchinson, D., Taschetto, A., and England, M.: Obliquity Control On Southern Hemisphere Climate During The Last Glacial, Sci. Rep.-UK, 5, 11673, https://doi.org/10.1038/srep11673, 2015. a, b
Galbraith, R. and Roberts, R.: Statistical aspects of equivalent dose and error calculation and display in OSL dating: An overview and some recommendations, Quat. Geochronol., 11, 1–27, https://doi.org/10.1016/j.quageo.2012.04.020, 2012. a, b
García, J. L., Hein, A. S., Binnie, S. A., Gómez, G. A., González, M. A., and Dunai, T. J.: The MIS 3 maximum of the Torres del Paine and Última Esperanza ice lobes in Patagonia and the pacing of southern mountain glaciation, Quaternary Sci. Rev., 185, 9–26, https://doi.org/10.1016/j.quascirev.2018.01.013, 2018. a, b, c, d, e, f, g, h, i
García, J. L., Hall, B. L., Kaplan, M. R., Gómez, G. A., De Pol-Holz, R., García, V. J., Schaefer, J. M., and Schwartz, R.: 14C and 10Be dated Late Holocene fluctuations of Patagonian glaciers in Torres del Paine (Chile, 51° S) and connections to Antarctic climate change, Quaternary Sci. Rev., 246, 106541, https://doi.org/10.1016/J.QUASCIREV.2020.106541, 2020. a
Garreaud, R., Vuille, M., Compagnucci, R., and Marengo, J.: Present-day South American climate, Palaeogeogr. Palaeocl., 281, 180–195, https://doi.org/10.1016/j.palaeo.2007.10.032, 2009. a, b
Garreaud, R., Lopez, P., Minvielle, M., and Rojas, M.: Large-Scale Control on the Patagonian Climate, J. Climate, 26, 215–230, https://doi.org/10.1175/JCLI-D-12-00001.1, 2013. a
GEBCO Compilation Group: GEBCO 2024 Grid, GEBCO Compilation Group [data set], https://doi.org/10.5285/1c44ce99-0a0d-5f4f-e063-7086abc0ea0f, 2024. a
Girault, I., Todisco, D., Çiner, A., Sarıkaya, M. A., Yıldırım, C., Quiquerez, A., Martin, F., Borrero, L., Fabel, D., Grandjean, P., Nehme, C., and Mouralis, D.: 10Be chronology of deglaciation and ice-dammed lake regression in the vicinity of the Mylodon Cave (Cerro Benítez, Patagonia, Chile), Quaternary Sci. Rev., 278, 107354, https://doi.org/10.1016/j.quascirev.2021.107354, 2022. a
Glasser, N. F. and Ghiglione, M. C.: Structural, tectonic and glaciological controls on the evolution of fjord landscapes, Geomorphology, 105, 291–302, https://doi.org/10.1016/j.geomorph.2008.10.007, 2009. a
Glasser, N. F., Jansson, K. N., Goodfellow, B. W., De Angelis, H., Rodnight, H., and Rood, D. H.: Cosmogenic nuclide exposure ages for moraines in the Lago San Martin Valley, Argentina, Quaternary Res., 75, 636–646, https://doi.org/10.1016/j.yqres.2010.11.005, 2011. a, b
Goyanes, G. and Massabie, A.: Push moraines in the upper valley of Santa Cruz river, southwest Argentina. Structural analysis and relationship with Late Pleistocene paleoclimate, J. S. Am. Earth Sci., 57, 1–11, https://doi.org/10.1016/j.jsames.2014.10.003, 2015. a, b, c
Hagemann, J. R., Lamy, F., Arz, H. W., Lembke-Jene, L., Auderset, A., Harada, N., Ho, S. L., Iwasaki, S., Kaiser, J., Lange, C. B., and Murayama, M.: A marine record of Patagonian ice sheet changes over the past 140,000 years, P. Natl. Acad. Sci. USA, 121, e2302983121, https://doi.org/10.1073/pnas.2302983121, 2024. a, b
Hall, B., Lowell, T., and Brickle, P.: Multiple glacial maxima of similar extent at 20–45 ka on Mt. Usborne, East Falkland, South Atlantic region, Quaternary Sci. Rev., 250, 106677, https://doi.org/10.1016/j.quascirev.2020.106677, 2020. a, b, c, d
Hays, J. D., Imbrie, J., and Shackleton, N. J.: Variations in the Earth's Orbit: Pacemaker of the Ice Ages, Science, 194, 1121–1132, https://doi.org/10.1126/science.194.4270.1121, 1976. a
Hein, A. S., Hulton, N. R. J., Dunai, T. J., Schnabel, C., Kaplan, M. R., Naylor, M., and Xu, S.: Middle Pleistocene glaciation in Patagonia dated by cosmogenic-nuclide measurements on outwash gravels, Earth Planet. Sc. Lett., 286, 184–197, https://doi.org/10.1016/j.epsl.2009.06.026, 2009. a, b, c, d
Hein, A. S., Hulton, N. R. J., Dunai, T. J., Sugden, D. E., Kaplan, M. R., and Xu, S.: The chronology of the Last Glacial Maximum and deglacial events in central Argentine Patagonia, Quaternary Sci. Rev., 29, 1212–1227, https://doi.org/10.1016/j.quascirev.2010.01.020, 2010. a
Hein, A. S., Dunai, T. J., Hulton, N. R., and Xu, S.: Exposure dating outwash gravels to determine the age of the greatest Patagonian glaciations, Geology, 39, 103–106, 2011. a
Hein, A. S., Cogez, A., Darvill, C. M., Mendelova, M., Kaplan, M. R., Herman, F., Dunai, T. J., Norton, K., Xu, S., Christl, M., and Rodés, A.: Regional mid-Pleistocene glaciation in central Patagonia, Quaternary Sci. Rev., 164, 77–94, https://doi.org/10.1016/j.quascirev.2017.03.023, 2017. a, b, c, d
Hughes, P. D., Gibbard, P. L., and Ehlers, J.: Timing of glaciation during the last glacial cycle: Evaluating the concept of a global 'Last Glacial Maximum' (LGM), Earth-Sci. Rev., 125, 171–198, https://doi.org/10.1016/j.earscirev.2013.07.003, 2013. a
Hulton, N. R. J., Purves, R. S., McCulloch, R. D., Sugden, D. E., and Bentley, M. J.: The Last Glacial Maximum and deglaciation in southern South America, Quaternary Sci. Rev., 21, 233–241, https://doi.org/10.1016/S0277-3791(01)00103-2, 2002. a
Huntley, D. J. and Lamothe, M.: Ubiquity of anomalous fading in K-feldspars and the measurement and correction for it in optical dating, Can. J. Earth Sci., 38, 1093–1106, https://doi.org/10.1139/e01-013, 2001. a, b
Huybers, P. and Denton, G.: Antarctic temperature at orbital timescales controlled by local summer duration, Nat. Geosci., 1, 787–792, https://doi.org/10.1038/ngeo311, 2008. a
Imbrie, J., Berger, A., Boyle, E. A., Clemens, S. C., Duffy, A., Howard, W. R., Kukla, G., Kutzbach, J., Martinson, D. G., McIntyre, A., Mix, A. C., Molfino, B., Morley, J. J., Peterson, L. C., Pisias, N. G., Prell, W. L., Raymo, M. E., Shackleton, N. J., and Toggweiler, J. R.: On the structure and origin of major glaciation cycles 2. The 100,000-year cycle, Paleoceanography, 8, 699–735, https://doi.org/10.1029/93PA02751, 1993. a
Instituto Geográfico Nacional: Modelo Digital de Elevaciones [data set], https://www.ign.gob.ar/NuestrasActividades/Geodesia/ModeloDigitalElevaciones/Introduccion, last access: 31 August 2020. a
Jones, A. G., Marcott, S. A., Gorin, A. L., Kennedy, T. M., Shakun, J. D., Goehring, B. M., Menounos, B., Clark, D. H., Romero, M., and Caffee, M. W.: Four North American glaciers advanced past their modern positions thousands of years apart in the Holocene, The Cryosphere, 17, 5459–5475, https://doi.org/10.5194/tc-17-5459-2023, 2023. a
Jones, R., Small, D., Cahill, N., Bentley, M., and Whitehouse, P.: iceTEA: Tools for plotting and analysing cosmogenic-nuclide surface-exposure data from former ice margins, Quat. Geochronol., 51, 72–86, https://doi.org/10.1016/j.quageo.2019.01.001, 2019. a
Jouzel, J., Masson-Delmotte, V., Cattani, O., Dreyfus, G., Falourd, S., Hoffmann, G., Minster, B., Nouet, J., Barnola, J. M., Chappellaz, J., Fischer, H., Gallet, J. C., Johnsen, S., Leuenberger, M., Loulergue, L., Luethi, D., Oerter, H., Parrenin, F., Raisbeck, G., Raynaud, D., Schilt, A., Schwander, J., Selmo, E., Souchez, R., Spahni, R., Stauffer, B., Steffensen, J. P., Stenni, B., Stocker, T. F., Tison, J. L., Werner, M., and Wolff, E. W.: Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years, Science, 317, 793–796, https://doi.org/10.1126/science.1141038, 2007. a, b
Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L., Iredell, M., Saha, S., White, G., Woollen, J., Zhu, Y., Chelliah, M., Ebisuzaki, W., Higgins, W., Janowiak, J., Mo, K. C., Ropelewski, C., Wang, J., Leetmaa, A., Reynolds, R., Jenne, R., and Joseph, D.: The NCEP/NCAR 40-Year Reanalysis Project, B. Am. Meteorol. Soc., 77, 437–472, https://doi.org/10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2, 1996 (data available at: https://psl.noaa.gov/data/gridded/data.ncep.reanalysis.html, last access: 20 October 2023). a
Kaplan, M. R., Ackert, R. P., Singer, B. S., Douglass, D. C., and Kurz, M. D.: Cosmogenic nuclide chronology of millennial-scale glacial advances during O-isotope stage 2 in Patagonia, Bull. Geol. Soc. Am., 116, 308–321, https://doi.org/10.1130/B25178.1, 2004. a
Kaplan, M. R., Douglass, D. C., Singer, B. S., Ackert, R. P., and Caffee, M. W.: Cosmogenic nuclide chronology of pre-last glacial maximum moraines at Lago Buenos Aires, 46° S, Argentina, Quaternary Res., 63, 301–315, https://doi.org/10.1016/j.yqres.2004.12.003, 2005. a, b, c
Kaplan, M. R., Hein, A. S., Hubbard, A., and Lax, S. M.: Can glacial erosion limit the extent of glaciation?, Geomorphology, 103, 172–179, 2009. a
Kaplan, M. R., Strelin, J. A., Schaefer, J. M., Denton, G. H., Finkel, R. C., Schwartz, R., Putnam, A. E., Vandergoes, M. J., Goehring, B. M., and Travis, S. G.: In-situ cosmogenic 10Be production rate at Lago Argentino, Patagonia: Implications for late-glacial climate chronology, Earth Planet. Sc. Lett., 309, 21–32, https://doi.org/10.1016/j.epsl.2011.06.018, 2011. a, b
Kaplan, M. R., Schaefer, J. M., Strelin, J. A., Denton, G. H., Anderson, R. F., Vandergoes, M. J., Finkel, R. C., Schwartz, R., Travis, S. G., Garcia, J. L., Martini, M. A., and Nielsen, S. H.: Patagonian and southern South Atlantic view of Holocene climate, Quaternary Sci. Rev., 141, 112–125, https://doi.org/10.1016/j.quascirev.2016.03.014, 2016. a
Kelley, S. E., Kaplan, M. R., Schaefer, J. M., Andersen, B. G., Barrell, D. J., Putnam, A. E., Denton, G. H., Schwartz, R., Finkel, R. C., and Doughty, A. M.: High-precision 10 Be chronology of moraines in the Southern Alps indicates synchronous cooling in Antarctica and New Zealand 42,000 years ago, Earth Planet. Sc. Lett., 405, 194–206, https://doi.org/10.1016/j.epsl.2014.07.031, 2014. a, b
Kiernan, K., Fink, D., Greig, D., and Mifud, C.: Cosmogenic radionuclide chronology of pre-last glacial cycle moraines in the Western Arthur range, Southwest Tasmania, Quaternary Sci. Rev., 29, 3286–3297, https://doi.org/10.1016/j.quascirev.2010.07.023, 2010. a
Kohfeld, K., Graham, R., De Boer, A., Sime, L., Wolff, E., Le Quéré, C., and Bopp, L.: Southern Hemisphere westerly wind changes during the Last Glacial Maximum: paleo-data synthesis, Quaternary Sci. Rev., 68, 76–95, https://doi.org/10.1016/j.quascirev.2013.01.017, 2013. a
Lal, D.: Cosmic ray labeling of erosion surfaces: in situ nuclide production rates and erosion models, Earth Planet. Sc. Lett., 104, 424–439, https://doi.org/10.1016/0012-821X(91)90220-C, 1991. a, b, c, d
Lambert, F., Delmonte, B., Petit, J. R., Bigler, M., Kaufmann, P. R., Hutterli, M. A., Stocker, T. F., Ruth, U., Steffensen, J. P., and Maggi, V.: Dust – Climate couplings over the past 800,000 years from the EPICA Dome C ice core, Nature, 452, 616–619, https://doi.org/10.1038/nature06763, 2008. a, b
Leger, T. P. M., Hein, A. S., Bingham, R. G., Martini, M. A., Soteres, R. L., Sagredo, E. A., and Martínez, O. A.: The glacial geomorphology of the Río Corcovado, Río Huemul and Lago Palena/General Vintter valleys, northeastern Patagonia (43° S, 71° W), J. Maps, 16, 651–668, https://doi.org/10.1080/17445647.2020.1794990, 2020. a, b, c, d, e, f, g, h
Leger, T. P. M., Hein, A. S., Rodés, Á., Bingham, R. G., Schimmelpfennig, I., Fabel, D., Tapia, P., and ASTER Team: A cosmogenic nuclide-derived chronology of pre-Last Glacial Cycle glaciations during MIS 8 and MIS 6 in northern Patagonia, Clim. Past, 19, 35–59, https://doi.org/10.5194/cp-19-35-2023, 2023. a, b, c
Lenaerts, J. T. M., Broeke, M. R. v. d., Wessem, J. M. v., Berg, W. J. v. d., Meijgaard, E. v., Ulft, L. H. v., and Schaefer, M.: Extreme Precipitation and Climate Gradients in Patagonia Revealed by High-Resolution Regional Atmospheric Climate Modeling, J. Climate, 27, 4607–4621, https://doi.org/10.1175/JCLI-D-13-00579.1, 2014. a
Li, Y. K.: Determining topographic shielding from digital elevation models for cosmogenic nuclide analysis: a GIS approach and field validation, J. Mt. Sci., 10, 355–362, https://doi.org/10.1007/s11629-013-2564-1, 2013. a
Li, Y. K.: Determining topographic shielding from digital elevation models for cosmogenic nuclide analysis: a GIS model for discrete sample sites, J. Mt. Sci., 15, 939–947, https://doi.org/10.1007/s11629-018-4895-4, 2018. a
Lifton, N., Sato, T., and Dunai, T. J.: Scaling in situ cosmogenic nuclide production rates using analytical approximations to atmospheric cosmic-ray fluxes, Earth Planet. Sc. Lett., 386, 149–160, https://doi.org/10.1016/j.epsl.2013.10.052, 2014. a, b
Lira, M.-P., García, J.-L., Bentley, M. J., Jamieson, S. S. R., Darvill, C. M., Hein, A. S., Fernández, H., Rodés, A., Fabel, D., Smedley, R. K., and Binnie, S. A.: The Last Glacial Maximum and Deglacial History of the Seno Skyring Ice Lobe (52° S), Southern Patagonia, Front. Earth Sci., 10, 892316, https://doi.org/10.3389/feart.2022.892316, 2022. a
Lisiecki, L. E. and Raymo, M. E.: A Pliocene–Pleistocene stack of 57 globally distributed benthic δ18O records, Paleoceanography, 20, 1–17, https://doi.org/10.1029/2004PA001071, 2005. a, b, c, d
Marcott, S. A.: Late Pleistocene and Holocene Glacier and Climate Change, PhD, Oregon State University, Oregon, United States, iSBN: 9781124762432, 2011. a
Mejdahl, V.: Thermoluminescence Dating: Beta-Dose Attenuation in Quartz Grains, Archaeometry, 21, 61–72, https://doi.org/10.1111/j.1475-4754.1979.tb00241.x, 1979. a
Mendelová, M., Hein, A. S., Rodés, A., and Xu, S.: Extensive mountain glaciation in central Patagonia during Marine Isotope Stage 5, Quaternary Sci. Rev., 227, 105996, https://doi.org/10.1016/j.quascirev.2019.105996, 2020. a, b, c, d
Mercer, J. H.: Glacial history of southernmost South America, Quaternary Res., 6, 125–166, https://doi.org/10.1016/0033-5894(76)90047-8, 1976. a, b
Minowa, M., Sugiyama, S., Sakakibara, D., and Skvarca, P.: Seasonal variations in ice-front position controlled by frontal ablation at Glaciar Perito Moreno, the Southern Patagonia Icefield, Front. Earth Sci., 5, 1, https://doi.org/10.3389/feart.2017.00001, 2017. a
Minowa, M., Schaefer, M., Sugiyama, S., Sakakibara, D., and Skvarca, P.: Frontal ablation and mass loss of the Patagonian icefields, Earth Planet. Sc. Lett., 561, 116811, https://doi.org/10.1016/J.EPSL.2021.116811, 2021. a
Moreno, P. I., Denton, G. H., Moreno, H., Lowell, T. V., Putnam, A. E., and Kaplan, M. R.: Radiocarbon chronology of the last glacial maximum and its termination in northwestern Patagonia, Quaternary Sci. Rev., 122, 233–249, https://doi.org/10.1016/j.quascirev.2015.05.027, 2015. a
Moreno, P. I., Vilanova, I., Villa-Martínez, R., Dunbar, R. B., Mucciarone, D. A., Kaplan, M. R., Garreaud, R. D., Rojas, M., Moy, C. M., De Pol-Holz, R., and Lambert, F.: Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale, Sci. Rep.-UK, 8, 3458, https://doi.org/10.1038/s41598-018-21836-6, 2018. a, b
Mouginot, J. and Rignot, E.: Ice motion of the Patagonian Icefields of South America: 1984–2014, Geophys. Res. Lett., 42, 1441–1449, https://doi.org/10.1002/2014GL062661, 2015. a
NOAA National Centers for Environmental Information: ETOPO 2022 15 Arc-Second Global Relief Model, NOAA National Centers for Environmental Information [data set], https://doi.org/10.25921/fd45-gt74, 2022. a
Nelson, M. S., Gray, H. J., Johnson, J. A., Rittenour, T. M., Feathers, J. K., and Mahan, S. A.: User Guide for Luminescence Sampling in Archaeological and Geological Contexts, Advances in Archaeological Practice, 3, 166–177, https://doi.org/10.7183/2326-3768.3.2.166, 2015. a
Nishiizumi, K., Imamura, M., Caffee, M. W., Southon, J. R., Finkel, R. C., and McAninch, J.: Absolute calibration of 10Be AMS standards, Nucl. Instrum. Meth. B, 258, 403–413, https://doi.org/10.1016/j.nimb.2007.01.297, 2007. a
Pasquini, A. I., Cosentino, N. J., and Depetris, P. J.: The Main Hydrological Features of Patagonia's Santa Cruz River: An Updated Assessment, in: Environmental Assessment of Patagonia's Water Resources, Environmental Earth Sciences, edited by: Torres, A. I. and Campodonico, V. A., Springer International Publishing, Cham, https://doi.org/10.1007/978-3-030-89676-8_9, pp. 195–210, 2021. a
Peltier, C., Kaplan, M. R., Birkel, S. D., Soteres, R. L., Sagredo, E. A., Aravena, J. C., Araos, J., Moreno, P. I., Schwartz, R., and Schaefer, J. M.: The large MIS 4 and long MIS 2 glacier maxima on the southern tip of South America, Quaternary Sci. Rev., 262, 106858, https://doi.org/10.1016/J.QUASCIREV.2021.106858, 2021. a
Peltier, C., Kaplan, M. R., Sagredo, E. A., Moreno, P. I., Araos, J., Birkel, S. D., Villa-Martínez, R., Schwartz, R., Reynhout, S. A., and Schaefer, J. M.: The last two glacial cycles in central Patagonia: A precise record from the Ñirehuao glacier lobe, Quaternary Sci. Rev., 304, 107873, https://doi.org/10.1016/j.quascirev.2022.107873, 2023. a, b, c, d, e
Putnam, A. E., Schaefer, J. M., Denton, G. H., Barrell, D. J., Birkel, S. D., Andersen, B. G., Kaplan, M. R., Finkel, R. C., Schwartz, R., and Doughty, A. M.: The Last Glacial Maximum at 44°S documented by a 10Be moraine chronology at Lake Ohau, Southern Alps of New Zealand, Quaternary Sci. Rev., 62, 114–141, https://doi.org/10.1016/j.quascirev.2012.10.034, 2013. a, b, c, d
Rabassa, J. and Clapperton, C. M.: Quaternary glaciations of the southern Andes, Quaternary Sci. Rev., 9, 153–174, https://doi.org/10.1016/0277-3791(90)90016-4, 1990. a
Ramos, V. A. and Kay, S. M.: Southern Patagonian plateau basalts and deformation: Backarc testimony of ridge collisions, Tectonophysics, 205, 261–282, https://doi.org/10.1016/0040-1951(92)90430-E, 1992. a
Rees-Jones, J.: Optical dating of young sediments using fine-grain quartz, Ancient TL, 13, 9–15, 1995. a
Reynhout, S. A., Sagredo, E. A., Kaplan, M. R., Aravena, J. C., Martini, M. A., Moreno, P. I., Rojas, M., Schwartz, R., and Schaefer, J. M.: Holocene glacier fluctuations in Patagonia are modulated by summer insolation intensity and paced by Southern Annular Mode-like variability, Quaternary Sci. Rev., 220, 178–187, https://doi.org/10.1016/j.quascirev.2019.05.029, 2019. a
Romero, M., Penprase, S., Van Wyk de Vries, M., Wickert, A., Jones, A., Marcott, S., Strelin, J., Martini, M., Rittenour, T., Brignone, G., Shapley, M., Ito, E., MacGregor, K., and Caffee, M.: Shapefiles of Lago Argentino – Rio Santa Cruz glacial landforms, Zenodo [data set], https://doi.org/10.5281/zenodo.11556612, 2024. a
Rose, B. E. J.: Insolation, The Climate Laboratory [code], https://climlab.readthedocs.io/en/latest/index.html, last access: 20 October 2023. a
Rother, H., Fink, D., Shulmeister, J., Mifsud, C., Evans, M., and Pugh, J.: The early rise and late demise of New Zealand's last glacial maximum, P. Natl. Acad. Sci. USA, 111, 11630–11635, 2014. a
Rudolph, E. M., Hedding, D. W., Hodgson, D. A., Fabel, D., Gheorghiu, D. M., Shanks, R., and Nel, W.: A glacial chronology for sub-Antarctic Marion Island from MIS 2 and MIS 3, Quaternary Sci. Rev., 325, 108485, 2024. a
Sagredo, E. A., Moreno, P. I., Villa-Martínez, R., Kaplan, M. R., Kubik, P. W., and Stern, C. R.: Fluctuations of the Última Esperanza ice lobe (52° S), Chilean Patagonia, during the last glacial maximum and termination 1, Geomorphology, 125, 92–108, https://doi.org/10.1016/j.geomorph.2010.09.007, 2011. a, b, c
Sagredo, E. A., Reynhout, S. A., Kaplan, M. R., Aravena, J. C., Araya, P. S., Luckman, B. H., Schwartz, R., and Schaefer, J. M.: Holocene History of Río Tranquilo Glacier, Monte San Lorenzo (47° S), Central Patagonia, Front. Earth Sci., 9, https://doi.org/10.3389/feart.2021.813433, 2021. a
Schaefer, J. M., Putnam, A. E., Denton, G. H., Kaplan, M. R., Birkel, S., Doughty, A. M., Kelley, S., Barrell, D. J., Finkel, R. C., Winckler, G., Anderson, R. F., Ninneman, U. S., Barker, S., Schwartz, R., Andersen, B. G., and Schluechter, C.: The Southern Glacial Maximum 65,000 years ago and its Unfinished Termination, Quaternary Sci. Rev., 114, 52–60, https://doi.org/10.1016/J.QUASCIREV.2015.02.009, 2015. a
Shulmeister, J., Thackray, G. D., Rittenour, T. M., and Hyatt, O. M.: Multiple glacial advances in the Rangitata Valley, South Island, New Zealand, imply roles for Southern Hemisphere westerlies and summer insolation in MIS 3 glacial advances, Quaternary Res., 89, 375–393, https://doi.org/10.1017/qua.2017.108, 2018. a
Shulmeister, J., Thackray, G. D., Rittenour, T. M., Fink, D., and Patton, N. R.: The timing and nature of the last glacial cycle in New Zealand, Quaternary Sci. Rev., 206, 1–20, https://doi.org/10.1016/j.quascirev.2018.12.020, 2019. a, b, c, d
Sigman, D. M., Jaccard, S. L., and Haug, G. H.: Polar ocean stratification in a cold climate, Nature, 428, 59–63, https://doi.org/10.1038/nature02357, 2004. a
Smedley, R. K., Glasser, N. F., and Duller, G. A. T.: Luminescence dating of glacial advances at Lago Buenos Aires (46° S), Patagonia, Quaternary Sci. Rev., 134, 59–73, https://doi.org/10.1016/j.quascirev.2015.12.010, 2016. a, b
Soteres, R. L., Peltier, C., Kaplan, M. R., and Sagredo, E. A.: Glacial geomorphology of the Strait of Magellan ice lobe, southernmost Patagonia, South America, J. Maps, 16, 299–312, https://doi.org/10.1080/17445647.2020.1736197, 2020. a, b, c
Soteres, R. L., Sagredo, E. A., Moreno, P. I., Lowell, T. V., and Alloway, B. V.: Glacial geomorphology of the central and southern Chilotan Archipelago (42.2° S–43.5° S), northwestern Patagonia, J. Maps, 18, 151–167, https://doi.org/10.1080/17445647.2021.2008538, 2022. a
Sproson, A. D., Yokoyama, Y., Miyairi, Y., Aze, T., Clementi, V. J., Riechelson, H., Bova, S. C., Rosenthal, Y., and Childress, L. B.: Near-synchronous Northern Hemisphere and Patagonian Ice Sheet variation over the last glacial cycle, Nat. Geosci., 17, 450–457, https://doi.org/10.1038/s41561-024-01436-y, 2024. a, b
Stone, J. O.: Air pressure and cosmogenic isotope production, J. Geophys. Res.-Sol. Ea., 105, 23753–23759, https://doi.org/10.1029/2000JB900181, 2000. a, b, c, d
Strand, P. D., Schaefer, J. M., Putnam, A. E., Denton, G. H., Barrell, D. J. A., Koffman, T. N. B., and Schwartz, R.: Millennial-scale pulsebeat of glaciation in the Southern Alps of New Zealand, Quaternary Sci. Rev., 220, 165–177, https://doi.org/10.1016/j.quascirev.2019.07.022, 2019. a, b
Strelin, J. A., Re, G., Keller, R., and Malagnino, E.: New evidence concerning the Plio–Pleistocene landscape evolution of southern Santa Cruz region, J. S. Am. Earth Sci., 12, 333–341, https://doi.org/10.1016/S0895-9811(99)00022-X, 1999. a, b, c, d
Strelin, J. A., Denton, G. H., Vandergoes, M. J., Ninnemann, U. S., and Putnam, A. E.: Radiocarbon chronology of the late-glacial Puerto Bandera moraines, Southern Patagonian Icefield, Argentina, Quaternary Sci. Rev., 30, 2551–2569, https://doi.org/10.1016/j.quascirev.2011.05.004, 2011. a, b, c
Strelin, J. A., Kaplan, M. R., Vandergoes, M. J., Denton, G. H., and Schaefer, J. M.: Holocene glacier history of the Lago Argentino basin, Southern Patagonian Icefield, Quaternary Sci. Rev., 101, 124–145, https://doi.org/10.1016/j.quascirev.2014.06.026, 2014. a, b
Sugden, D. E., Hulton, N. R. J., and Purves, R. S.: Modelling the inception of the Patagonian icesheet, Quatern. Int., 95–96, 55–64, https://doi.org/10.1016/S1040-6182(02)00027-7, 2002. a
Van Wyk de Vries, M., Ito, E., Shapley, M., Brignone, G., Romero, M., Wickert, A. D., Miller, L. H., and MacGregor, K. R.: Physical Limnology and Sediment Dynamics of Lago Argentino, the World's Largest Ice-Contact Lake, J. Geophys. Res.-Earth, 127, e2022JF006598, https://doi.org/10.1029/2022JF006598, 2022. a
Van Wyk De Vries, M., Romero, M., Penprase, S. B., Ng, G.-H. C., and Wickert, A. D.: Increasing rate of 21st century volume loss of the Patagonian Icefields measured from proglacial river discharge, J. Glaciol., 69, 1187–1202, https://doi.org/10.1017/jog.2023.9, 2023. a
Wallinga, J., Murray, A., and Wintle, A.: The single-aliquot regenerative-dose (SAR) protocol applied to coarse-grain feldspar, Radiat. Meas., 32, 529–533, https://doi.org/10.1016/S1350-4487(00)00091-3, 2000. a, b
Wenzens, G.: Fluctuations of Outlet and Valley Glaciers in the Southern Andes (Argentina) during the Past 13,000 Years, Quaternary Res., 51, 238–247, https://doi.org/10.1006/qres.1999.2043, 1999. a
Wenzens, G.: Glacier advances east of the Southern Andes between the Last Glacial Maximum and 5,000 BP compared with lake terraces of the endorrheic Lago Cardiel (49° S, Patagonia, Argentina), Z. Geomorphol., 49, 433–454, https://doi.org/10.1127/zfg/49/2005/433, 2005. a
Wolff, E. W., Fischer, H., Fundel, F., Ruth, U., Twarloh, B., Littot, G. C., Mulvaney, R., Röthlisberger, R., de Angelis, M., Boutron, C. F., Hansson, M., Jonsell, U., Hutterli, M. A., Lambert, F., Kaufmann, P., Stauffer, B., Stocker, T. F., Steffensen, J. P., Bigler, M., Siggaard-Andersen, M. L., Udisti, R., Becagli, S., Castellano, E., Severi, M., Wagenbach, D., Barbante, C., Gabrielli, P., and Gaspari, V.: Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles, Nature, 440, 491–496, https://doi.org/10.1038/nature04614, 2006. a, b, c
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...