Articles | Volume 4, issue 2
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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Cited articles

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Ackert, R. P., Mukhopadhyay, S., Pollard, D., DeConto, R. M., Putnam, A. E., and Borns, H. W.: West Antarctic Ice Sheet elevations in the Ohio Range: Geologic constraints and ice sheet modeling prior to the last highstand, Earth Planet. Sc. Lett., 307, 1–2, 83–93,, 2011. 
Affolter, S., Häuselmann, A., Fleitmann, D., Lawrence Edwards, R., Cheng, H., and Leuenberger, M.: Central Europe temperature constrained by speleothem fluid inclusion water isotopes over the past 14,000 years, Science Advances, 5, eaav3809,, 2019. 
Allen, R., Siegert, M. J., and Payne, A. J.: Reconstructing glacier-based climates of LGM Europe and Russia – Part 2: A dataset of LGM precipitation/temperature relations derived from degree-day modelling of palaeo glaciers, Clim. Past, 4, 249–263,, 2008. 
André, M.-F.: Rates of postglacial rock weathering on glacially scoured outcrops (Abisko–Riksgränsen area, 68 N), Geogr. Ann. A, 84, 139–150,, 2002. 
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.