Articles | Volume 5, issue 2
https://doi.org/10.5194/gchron-5-333-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-5-333-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Spatial variability of the modern radiocarbon reservoir effect in the high-altitude lake Laguna del Peinado (southern Puna Plateau, Argentina)
Paula A. Vignoni
CORRESPONDING AUTHOR
Institut für Geowissenschaften, Universität Potsdam, 14476 Potsdam, Germany
Klimadynamik und Landschaftsentwicklung, Deutsches
GeoForschungsZentrum (GFZ), 14473 Potsdam, Germany
Francisco E. Córdoba
Instituto de Ecorregiones Andinas INECOA, CONICET – Universidad
Nacional de Jujuy, San Salvador de Jujuy, 4600, Argentina
Instituto de Geología y Minería, Universidad Nacional de
Jujuy, San Salvador de Jujuy, 4600, Argentina
Rik Tjallingii
Klimadynamik und Landschaftsentwicklung, Deutsches
GeoForschungsZentrum (GFZ), 14473 Potsdam, Germany
Carla Santamans
Instituto de Ecorregiones Andinas INECOA, CONICET – Universidad
Nacional de Jujuy, San Salvador de Jujuy, 4600, Argentina
Instituto de Geología y Minería, Universidad Nacional de
Jujuy, San Salvador de Jujuy, 4600, Argentina
Liliana C. Lupo
Instituto de Ecorregiones Andinas INECOA, CONICET – Universidad
Nacional de Jujuy, San Salvador de Jujuy, 4600, Argentina
Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy, San
Salvador de Jujuy, 4600, Argentina
Achim Brauer
Institut für Geowissenschaften, Universität Potsdam, 14476 Potsdam, Germany
Klimadynamik und Landschaftsentwicklung, Deutsches
GeoForschungsZentrum (GFZ), 14473 Potsdam, Germany
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Productivity increases in Lake Kälksjön sediments during the last 9600 years are likely driven by the progressive millennial-scale winter warming in northwestern Europe, following the increasing Northern Hemisphere winter insolation and decadal to centennial periods of a more positive NAO polarity. Strengthened productivity variability since ∼5450 cal yr BP is hypothesized to reflect a reinforcement of NAO-like atmospheric circulation.
Rick Hennekam, Katharine M. Grant, Eelco J. Rohling, Rik Tjallingii, David Heslop, Andrew P. Roberts, Lucas J. Lourens, and Gert-Jan Reichart
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Laminated sediments from the deepest part of the Dead Sea unravel the hydrological response of the eastern Mediterranean to past climate changes. This study demonstrates the importance of geological archives in complementing modern hydrological measurements that do not fully capture natural hydroclimatic variability, which is crucial to configure for understanding the impact of climate change on the hydrological cycle in subtropical regions.
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Short summary
Radiocarbon dating is a widely used tool to establish chronologies for sediment records. We show that modern aquatic plants in the Laguna del Peinado lake system (Altiplano–Puna Plateau) give overestimated ages due to reservoir effects from the input of old groundwater and volcanic CO2. Our results reveal a spatial variability in the modern reservoir effect within the lake basin, which has implications for radiocarbon-based chronologies in paleoclimate studies in this (and similar) regions.
Radiocarbon dating is a widely used tool to establish chronologies for sediment records. We show...