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  Ubiquitous karst hydrological control on speleothem oxygen isotope variability in a global study

Treble, P. C., Baker, A., Abram, N. J., Hellstrom, J. C., Crawford, J., Gagan, M. K., et al. (2022). Ubiquitous karst hydrological control on speleothem oxygen isotope variability in a global study. Communications Earth & Environment, 3(1): 29. doi:10.1038/s43247-022-00347-3.

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 Creators:
Treble, Pauline C.1, Author
Baker, Andy1, Author
Abram, Nerilie J.1, Author
Hellstrom, John C.1, Author
Crawford, Jagoda1, Author
Gagan, Michael K.1, Author
Borsato, Andrea1, Author
Griffiths, Alan D.1, Author
Bajo, Petra1, Author
Markowska, Monika2, Author           
Priestley, Stacey C.1, Author
Hankin, Stuart1, Author
Paterson, David1, Author
Affiliations:
1external, ou_persistent22              
2Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_2237635              

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 Abstract: Speleothem oxygen isotopic (δ18O) records are used to reconstruct past hydroclimate yet records from the same cave do not always replicate. We use a global database of speleothem δ18O to quantify the replicability of records to show that disagreement is common worldwide, occurs across timescales and is unrelated to climate, depth or lithology. Our global analysis demonstrates that within-cave differences in mean speleothem δ18O values are consistent with those of dripwater, supporting a ubiquitous influence of flowpaths. We present a case study of four new stalagmite records from Golgotha Cave, southwest Australia, where the isotopic differences between them are informed by cave monitoring. It is demonstrated that karst hydrology is a major driver of within-cave speleothem and dripwater δ18O variability, primarily due to the influence of fractures on flowpaths. Applying our understanding of water movement through fractures assists in quantitative reconstruction of past climate variability from speleothem δ18O records.

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Language(s): eng - English
 Dates: 2022-02-15
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
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Title: Communications Earth & Environment
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: 10 Volume / Issue: 3 (1) Sequence Number: 29 Start / End Page: - Identifier: ISSN: 2662-4435
CoNE: https://pure.mpg.de/cone/journals/resource/2662-4435