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

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dc.contributor.authorTreble, PCen_AU
dc.contributor.authorBaker, AAen_AU
dc.contributor.authorAbram, NJen_AU
dc.contributor.authorHellstrom, JCen_AU
dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorGagan, MKen_AU
dc.contributor.authorBorsato, Aen_AU
dc.contributor.authorGriffiths, ADen_AU
dc.contributor.authorBajo, Pen_AU
dc.contributor.authorMarkowska, Men_AU
dc.contributor.authorPriestley, SCen_AU
dc.contributor.authorHankin, SIen_AU
dc.contributor.authorPaterson, DJen_AU
dc.date.accessioned2022-08-19T03:33:41Zen_AU
dc.date.available2022-08-19T03:33:41Zen_AU
dc.date.issued2022-02-15en_AU
dc.date.statistics2022-07-26en_AU
dc.description.abstractSpeleothem 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. © The Authors - Open Access under a Creative Commons Attribution 4.0 International License.en_AU
dc.description.sponsorshipThis research is supported by funding from the Australian Research Council (DP140102059 to PCT and NJA) and a Land & Water Australia grant (ANU52).en_AU
dc.identifier.citationTreble, P. C., Baker, A., Abram, N. J., Hellstrom, J. C., Crawford, J., Gagan, M. K., Borsato, A., Griffiths, A. D., Bajo, P., Markowska, M., Priestley, S. C., Hankin, S., & Paterson, D. (2022). Ubiquitous karst hydrological control on speleothem oxygen isotope variability in a global study. Communications Earth & Environment, 3, 1-10, 29. doi:10.1038/s43247-022-00347-3en_AU
dc.identifier.issn2662-4435en_AU
dc.identifier.journaltitleCommunications Earth & Environmenten_AU
dc.identifier.pagination1-10en_AU
dc.identifier.urihttps://doi.org/10.1038/s43247-022-00347-3en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13580en_AU
dc.identifier.volume3en_AU
dc.language.isoenen_AU
dc.publisherSpringer Natureen_AU
dc.subjectGeochemistryen_AU
dc.subjectHydrologyen_AU
dc.subjectPaleoclimatologyen_AU
dc.subjectOxygen isotopesen_AU
dc.subjectGlobal aspectsen_AU
dc.subjectCavesen_AU
dc.titleUbiquitous karst hydrological control on speleothem oxygen isotope variability in a global studyen_AU
dc.typeJournal Articleen_AU
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