Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas
Nearly 13,000 years ago, the warming trend into the Holocene was sharply interrupted by a reversal to near glacial conditions. Climatic causes and ecological consequences of the Younger Dryas (YD) have been extensively studied, however proxy archives from the Mediterranean basin capturing this perio...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/295528 2023-08-20T04:08:24+02:00 Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas Pauly, Maren Helle, Gerhard Miramont, Cécile Büntgen, Ulf Treydte, Kerstin Reinig, Frederick Guibal, Frédéric Sivan, Olivier Heinrich, Ingo Riedel, Frank Kromer, Bernd Balanzategui, Daniel Wacker, Lukas Sookdeo, Adam Brauer, Achim 2018-09-18 application/application/pdf https://hdl.handle.net/20.500.11850/295528 https://doi.org/10.3929/ethz-b-000295528 en eng Nature info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-018-32251-2 info:eu-repo/semantics/altIdentifier/wos/000444801300023 info:eu-repo/grantAgreement/SNF/Projekte MINT/157187 http://hdl.handle.net/20.500.11850/295528 doi:10.3929/ethz-b-000295528 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International Scientific Reports, 8 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftethz https://doi.org/20.500.11850/29552810.3929/ethz-b-00029552810.1038/s41598-018-32251-2 2023-07-30T23:49:11Z Nearly 13,000 years ago, the warming trend into the Holocene was sharply interrupted by a reversal to near glacial conditions. Climatic causes and ecological consequences of the Younger Dryas (YD) have been extensively studied, however proxy archives from the Mediterranean basin capturing this period are scarce and do not provide annual resolution. Here, we report a hydroclimatic reconstruction from stable isotopes (δ18O, δ13C) in subfossil pines from southern France. Growing before and during the transition period into the YD (12 900–12 600 cal BP), the trees provide an annually resolved, continuous sequence of atmospheric change. Isotopic signature of tree sourcewater (δ18Osw) and estimates of relative air humidity were reconstructed as a proxy for variations in air mass origin and precipitation regime. We find a distinct increase in inter-annual variability of sourcewater isotopes (δ18Osw), with three major downturn phases of increasing magnitude beginning at 12 740 cal BP. The observed variation most likely results from an amplified intensity of North Atlantic (low δ18Osw) versus Mediterranean (high δ18Osw) precipitation. This marked pattern of climate variability is not seen in records from higher latitudes and is likely a consequence of atmospheric circulation oscillations at the margin of the southward moving polar front. ISSN:2045-2322 Article in Journal/Newspaper North Atlantic ETH Zürich Research Collection |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
Nearly 13,000 years ago, the warming trend into the Holocene was sharply interrupted by a reversal to near glacial conditions. Climatic causes and ecological consequences of the Younger Dryas (YD) have been extensively studied, however proxy archives from the Mediterranean basin capturing this period are scarce and do not provide annual resolution. Here, we report a hydroclimatic reconstruction from stable isotopes (δ18O, δ13C) in subfossil pines from southern France. Growing before and during the transition period into the YD (12 900–12 600 cal BP), the trees provide an annually resolved, continuous sequence of atmospheric change. Isotopic signature of tree sourcewater (δ18Osw) and estimates of relative air humidity were reconstructed as a proxy for variations in air mass origin and precipitation regime. We find a distinct increase in inter-annual variability of sourcewater isotopes (δ18Osw), with three major downturn phases of increasing magnitude beginning at 12 740 cal BP. The observed variation most likely results from an amplified intensity of North Atlantic (low δ18Osw) versus Mediterranean (high δ18Osw) precipitation. This marked pattern of climate variability is not seen in records from higher latitudes and is likely a consequence of atmospheric circulation oscillations at the margin of the southward moving polar front. ISSN:2045-2322 |
format |
Article in Journal/Newspaper |
author |
Pauly, Maren Helle, Gerhard Miramont, Cécile Büntgen, Ulf Treydte, Kerstin Reinig, Frederick Guibal, Frédéric Sivan, Olivier Heinrich, Ingo Riedel, Frank Kromer, Bernd Balanzategui, Daniel Wacker, Lukas Sookdeo, Adam Brauer, Achim |
spellingShingle |
Pauly, Maren Helle, Gerhard Miramont, Cécile Büntgen, Ulf Treydte, Kerstin Reinig, Frederick Guibal, Frédéric Sivan, Olivier Heinrich, Ingo Riedel, Frank Kromer, Bernd Balanzategui, Daniel Wacker, Lukas Sookdeo, Adam Brauer, Achim Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas |
author_facet |
Pauly, Maren Helle, Gerhard Miramont, Cécile Büntgen, Ulf Treydte, Kerstin Reinig, Frederick Guibal, Frédéric Sivan, Olivier Heinrich, Ingo Riedel, Frank Kromer, Bernd Balanzategui, Daniel Wacker, Lukas Sookdeo, Adam Brauer, Achim |
author_sort |
Pauly, Maren |
title |
Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas |
title_short |
Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas |
title_full |
Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas |
title_fullStr |
Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas |
title_full_unstemmed |
Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas |
title_sort |
subfossil trees suggest enhanced mediterranean hydroclimate variability at the onset of the younger dryas |
publisher |
Nature |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11850/295528 https://doi.org/10.3929/ethz-b-000295528 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Scientific Reports, 8 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-018-32251-2 info:eu-repo/semantics/altIdentifier/wos/000444801300023 info:eu-repo/grantAgreement/SNF/Projekte MINT/157187 http://hdl.handle.net/20.500.11850/295528 doi:10.3929/ethz-b-000295528 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/29552810.3929/ethz-b-00029552810.1038/s41598-018-32251-2 |
_version_ |
1774720651339235328 |