Magnesium in subaqueous speleothems as a potential palaeotemperature proxy

Simple item page
dc.contributor.authorDrysdale, Russell N
dc.contributor.authorCouchoud, Isabelle
dc.contributor.authorZanchetta, G
dc.contributor.authorIsola, I.
dc.contributor.authorRegattieri, Eleonora
dc.contributor.authorHellstrom, John Charles
dc.contributor.authorGovin, Aline
dc.contributor.authorTzedakis, C.
dc.contributor.authorIreland, Trevor
dc.contributor.authorCorrick, Ellen
dc.contributor.authorGreig, Alan
dc.contributor.authorHolden, Peter
dc.date.accessioned2022-06-07T03:58:44Z
dc.date.available2022-06-07T03:58:44Z
dc.date.issued2020
dc.date.updated2021-01-17T07:18:26Z
dc.description.abstractFew palaeoclimate archives beyond the polar regions preserve continuous and datable palaeotemperature proxy time series over multiple glacial-interglacial cycles. This hampers efforts to develop a more coherent picture of global patterns of past temperatures. Here we show that Mg concentrations in a subaqueous speleothem from an Italian cave track regional sea-surface temperatures over the last 350,000 years. The Mg shows higher values during warm climate intervals and converse patterns during cold climate stages. In contrast to previous studies, this implicates temperature, not rainfall, as the principal driver of Mg variability. The depositional setting of the speleothem gives rise to Mg partition coefficients that are more temperature dependent than other calcites, enabling the effect of temperature change on Mg partitioning to greatly exceed the effects of changes in source-water Mg/Ca. Subaqueous speleothems from similar deep-cave environments should be capable of providing palaeotemperature information over multiple glacial-interglacial cycles.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2041-1723en_AU
dc.identifier.urihttp://hdl.handle.net/1885/267180
dc.language.isoen_AUen_AU
dc.provenanceThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/.en_AU
dc.publisherMacmillan Publishers Ltden_AU
dc.relationhttp://purl.org/au-research/grants/arc/DP0773700en_AU
dc.relationhttp://purl.org/au-research/grants/arc/DP110102185en_AU
dc.relationhttp://purl.org/au-research/grants/arc/DP160102969en_AU
dc.rights© 2020 The authorsen_AU
dc.rights.licensecreative commonsen_AU
dc.rights.urihttp://creativeco mmons.org/licenses/by/4.0/en_AU
dc.sourceNature Communicationsen_AU
dc.titleMagnesium in subaqueous speleothems as a potential palaeotemperature proxyen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue5027en_AU
local.bibliographicCitation.lastpage11en_AU
local.bibliographicCitation.startpage1en_AU
local.contributor.affiliationDrysdale, Russell N, University of Melbourneen_AU
local.contributor.affiliationCouchoud, Isabelle, Universite de Savoie-CNRSen_AU
local.contributor.affiliationZanchetta, G, University of Pisaen_AU
local.contributor.affiliationIsola, I., Instituto Nazionale di Geofisica e Vulcanologiaen_AU
local.contributor.affiliationRegattieri, Eleonora, Istituto di Geoscienze e Georisorseen_AU
local.contributor.affiliationHellstrom, John Charles, University of Melbourneen_AU
local.contributor.affiliationGovin, Aline, Paris-Saclay Universityen_AU
local.contributor.affiliationTzedakis, C., University College Londonen_AU
local.contributor.affiliationIreland, Trevor, College of Science, ANUen_AU
local.contributor.affiliationCorrick, Ellen, The University of Melbourneen_AU
local.contributor.affiliationGreig, Alan, University of Melbourneen_AU
local.contributor.affiliationHolden, Peter, College of Science, ANUen_AU
local.contributor.authoremailu8205445@anu.edu.auen_AU
local.contributor.authoruidIreland, Trevor, u8205445en_AU
local.contributor.authoruidHolden, Peter, u4044970en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor040303 - Geochronologyen_AU
local.identifier.absfor040605 - Palaeoclimatologyen_AU
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciencesen_AU
local.identifier.ariespublicationa383154xPUB15046en_AU
local.identifier.citationvolume11en_AU
local.identifier.doi10.1038/s41467-020-18083-7en_AU
local.identifier.uidSubmittedBya383154en_AU
local.publisher.urlhttps://www.nature.com/en_AU
local.type.statusPublished Versionen_AU

Downloads

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
01_Drysdale_Magnesium_in_subaqueous_2020.pdf
Size:
1.46 MB
Format:
Adobe Portable Document Format
Download

Collections

ANU Research Publications

DSpace software copyright © 2002-2024 LYRASIS