Articles | Volume 17, issue 5
https://doi.org/10.5194/cp-17-2165-2021
https://doi.org/10.5194/cp-17-2165-2021
Research article
 | 
19 Oct 2021
Research article |  | 19 Oct 2021

Climatic variations during the Holocene inferred from radiocarbon and stable carbon isotopes in speleothems from a high-alpine cave

Caroline Welte, Jens Fohlmeister, Melina Wertnik, Lukas Wacker, Bodo Hattendorf, Timothy I. Eglinton, and Christoph Spötl

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Revised manuscript accepted for CP
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Cited articles

Bajo, P., Borsato, A., Drysdale, R., Hua, Q., Frisia, S., Zanchetta, G., Hellstrom, J., and Woodhead, J.: Stalagmite carbon isotopes and dead carbon proportion (DCP) in a near-closed-system situation: An interplay between sulphuric and carbonic acid dissolution, Geochim. Cosmochim. Ac., 210, 208–227, 2017. 
Bar-Matthews, M., Ayalon, A., Kaufman, A., and Wasserburg, G. J.: The Eastern Mediterranean paleoclimate as a reflection of regional events: Soreq cave, Israel, Earth Planet Sc. Lett., 166, 85–95, 1999. 
Benavente, J., Vadillo, I., Carrasco, F., Soler, A., Linan, C., and Moral, F.: Air Carbon Dioxide Contents in the Vadose Zone of a Mediterranean Karst, Vadose Zone J., 9, 126–136, 2010. 
Bergel, S. J., Carlson, P. E., Larson, T. E., Wood, C. T., Johnson, K. R., Banner, J. L., and Breecker, D. O.: Constraining the subsoil carbon source to cave-air CO2 and speleothem calcite in central Texas, Geochim. Cosmochim. Ac., 217, 112–127, 2017. 
Breecker, D. O., Payne, A. E., Quade, J., Banner, J. L., Ball, C. E., Meyer, K. W., and Cowan, B. D.: The sources and sinks of CO2 in caves under mixed woodland and grassland vegetation, Geochim. Cosmochim. Ac., 96, 230–246, 2012. 
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Stalagmites are valuable climate archives, but unlike other proxies the use of stable carbon isotopes (δ13C) is still difficult. A stalagmite from the Austrian Alps was analyzed using a new laser ablation method for fast radiocarbon (14C) analysis. This allowed 14C and δ13C to be combined, showing that besides soil and bedrock a third source is contributing during periods of warm, wet climate: old organic matter.