Climate of the Past
Climate of the Past
CP
Articles | Volume 19, issue 1
Articles | Volume 19, issue 1
https://doi.org/10.5194/cp-19-35-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-19-35-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 1
Research article
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06 Jan 2023
Research article | Highlight paper |  | 06 Jan 2023

A cosmogenic nuclide-derived chronology of pre-Last Glacial Cycle glaciations during MIS 8 and MIS 6 in northern Patagonia

Tancrède P. M. Leger, Andrew S. Hein, Ángel Rodés, Robert G. Bingham, Irene Schimmelpfennig, Derek Fabel, Pablo Tapia, and ASTER Team

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This paper is providing new data about Southern Hemisphere ice sheet extent and dynamics during glaciations older than those occurring during the last climate cycle, a useful dataset that climate models require to calibrate their own reconstructions.
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Short summary
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.
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