Articles | Volume 4, issue 2
https://doi.org/10.5194/gchron-4-641-2022
https://doi.org/10.5194/gchron-4-641-2022
Research article
 | 
08 Nov 2022
Research article |  | 08 Nov 2022

Cosmogenic 3He paleothermometry on post-LGM glacial bedrock within the central European Alps

Natacha Gribenski, Marissa M. Tremblay, Pierre G. Valla, Greg Balco, Benny Guralnik, and David L. Shuster

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Latest update: 21 Feb 2024
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Short summary
We apply quartz 3He paleothermometry along two deglaciation profiles in the European Alps to reconstruct temperature evolution since the Last Glacial Maximum. We observe a 3He thermal signal clearly colder than today in all bedrock surface samples exposed prior the Holocene. Current uncertainties in 3He diffusion kinetics do not permit distinguishing if this signal results from Late Pleistocene ambient temperature changes or from recent ground temperature variation due to permafrost degradation.