Global analysis reveals climatic controls on the oxygen isotope composition of cave drip water

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dc.contributor.authorBaker, AAen_AU
dc.contributor.authorHartmann, Aen_AU
dc.contributor.authorDuan, WHen_AU
dc.contributor.authorHankin, SIen_AU
dc.contributor.authorComas-Bru, Len_AU
dc.contributor.authorCuthbert, MOen_AU
dc.contributor.authorTreble, PCen_AU
dc.contributor.authorBanner, Jen_AU
dc.contributor.authorGenty, Den_AU
dc.contributor.authorBaldini, LMen_AU
dc.contributor.authorBartolomé, Men_AU
dc.contributor.authorMoreno, Aen_AU
dc.contributor.authorPérez-Mejías, Cen_AU
dc.contributor.authorWerner, Men_AU
dc.date.accessioned2022-08-19T05:28:07Zen_AU
dc.date.available2022-08-19T05:28:07Zen_AU
dc.date.issued2019-07-05en_AU
dc.date.statistics2022-07-26en_AU
dc.descriptionOpen Access. This article is licensed under a Creative Commons Attribution 4.0 International License.en_AU
dc.description.abstractThe oxygen isotope composition of speleothems is a widely used proxy for past climate change. Robust use of this proxy depends on understanding the relationship between precipitation and cave drip water δ18O. Here, we present the first global analysis, based on data from 163 drip sites, from 39 caves on five continents, showing that drip water δ18O is most similar to the amount-weighted precipitation δ18O where mean annual temperature (MAT) is < 10 °C. By contrast, for seasonal climates with MAT > 10 °C and < 16 °C, drip water δ18O records the recharge-weighted δ18O. This implies that the δ18O of speleothems (formed in near isotopic equilibrium) are most likely to directly reflect meteoric precipitation in cool climates only. In warmer and drier environments, speleothems will have a seasonal bias toward the precipitation δ18O of recharge periods and, in some cases, the extent of evaporative fractionation of stored karst water. © 2019, The Author(s)en_AU
dc.description.sponsorshipFunding is gratefully acknowledged by MOC for an Independent Research Fellowship from the UK Natural Environment Research Council (NE/P017819/1). A.H. was supported by the Emmy Noether-Programme of the German Research Foundation (DFG; grant number HA 8113/1-1). W.D. was supported by the National Key R&D Programme of China (Grant 2017YFA0603400) and the Strategic Priority Research Programme of Chinese Academy of Sciences, Grant No. XDB26020000. L.C.B. was supported by ERC-funded project GC2.0 (Global Change 2.0: Unlocking the past for a clearer future, grant number 694481). A.M., M.B. and C.P. were supported by SPYRIT: Speleothems and Ice deposits from PYRenean caves to Reconstruct rapid climate Transitions (Ref: CGL2016-77479-R). L.B. was supported by Science Foundation Ireland through Research Frontiers Grants 07/RFP/GEOF265 and 08/FRP/GEO1184.en_AU
dc.identifier.citationBaker, A., Hartmann, A., Duan, W., Hankin, S., Comas-Bru, L., Cuthbert, M. O., Treble, P. C., Banner, J., Genty, D., Baldini, L. M., Bartolomé, M., Moreno, A., Pérez-Mejías, C. & Werner, M. (2019). Global analysis reveals climatic controls on the oxygen isotope composition of cave drip water. Nature communications, 10(1), 1-7. doi:10.1038/s41467-019-11027-wen_AU
dc.identifier.issn2041-1723en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleNature communicationsen_AU
dc.identifier.pagination1-7en_AU
dc.identifier.urihttps://doi.org/10.1038/s41467-019-11027-wen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13582en_AU
dc.identifier.volume10en_AU
dc.language.isoenen_AU
dc.publisherSpringer Natureen_AU
dc.subjectOxygen isotopesen_AU
dc.subjectCavesen_AU
dc.subjectWater influxen_AU
dc.subjectGlobal analysisen_AU
dc.subjectClimateen_AU
dc.subjectHydrologyen_AU
dc.subjectPaleoclimatologyen_AU
dc.titleGlobal analysis reveals climatic controls on the oxygen isotope composition of cave drip wateren_AU
dc.typeJournal Articleen_AU
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