Academic Journal
Magnesium in subaqueous speleothems as a potential palaeotemperature proxy
| العنوان: | Magnesium in subaqueous speleothems as a potential palaeotemperature proxy |
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| المؤلفون: | Drysdale, Russell, Couchoud, Isabelle, Zanchetta, Giovanni, Isola, Ilaria, Regattieri, Eleonora, Hellstrom, John, Govin, Aline, Tzedakis, Polychronis, C, Ireland, Trevor, Corrick, Ellen, Greig, Alan, Wong, Henri, Piccini, Leonardo, Holden, Peter, Woodhead, Jon |
| المساهمون: | School of Geography Melbourne, Faculty of Science Melbourne, University of Melbourne-University of Melbourne, Environnements, Dynamiques et Territoires de Montagne (EDYTEM), Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG), University of Pisa Italy = Università di Pisa Italia = Université de Pise Italie (UniPi), Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Pisa (INGV), Istituto Nazionale di Geofisica e Vulcanologia, CNR Istituto di Geoscienze e Georisorse Pisa (IGG-CNR), National Research Council of Italy, School of Earth Sciences Melbourne, Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Climat et Magnétisme (CLIMAG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), University College of London London (UCL), Research School of Earth Sciences ANU, Canberra (RSES), ANU College of Science Canberra, Australian National University (ANU)-Australian National University (ANU), Australian Nuclear Science and Technology Organisation Australie (ANSTO), Università degli Studi di Firenze = University of Florence = Université de Florence (UniFI), ANR-11-BSV4-0001,PARIS,Plasticité, assemblage et régulation du segment Initial de l'axone(2011) |
| المصدر: | ISSN: 2041-1723. |
| بيانات النشر: | CCSD Nature Publishing Group |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Magnesium Mg2+, Paleotemperatures, Speleothems, Paleoclimate, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, [SDU]Sciences of the Universe [physics], [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDE.MCG]Environmental Sciences/Global Changes |
| الوصف: | International audience ; Few 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. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1038/s41467-020-18083-7 |
| الاتاحة: | https://hal.science/hal-02965538 https://hal.science/hal-02965538v1/document https://hal.science/hal-02965538v1/file/Drysdale-NatCom2020.pdf https://doi.org/10.1038/s41467-020-18083-7 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.EF3897E0 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1038/s41467-020-18083-7 |
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