Climate of the Past
Climate of the Past
CP
Articles | Volume 21, issue 9
Articles | Volume 21, issue 9
https://doi.org/10.5194/cp-21-1585-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-21-1585-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 9
Research article
 | 
11 Sep 2025
Research article |  | 11 Sep 2025

500 000-year-old basal ice at Skytrain Ice Rise, West Antarctica, estimated with the 36Cl ∕ 10Be ratio

Niklas Kappelt, Eric Wolff, Marcus Christl, Christof Vockenhuber, Philip Gautschi, and Raimund Muscheler

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Short summary
By measuring the radioactive decay of atmospherically produced 36Cl and 10Be in an ice core drilled in West Antarctica, we were able to determine the age of the deepest sample close to bedrock to be about 550 thousand years old. This means that the ice in this location, known as Skytrain Ice Rise, has survived several warm periods in the past, at least since marine isotope stage 11.
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