Maren Pauly, Gerhard Helle, Cecile Miramont, Ulf Buentgen, Kerstin Treydte, Frederick Reinig, Frederic Guibal, Olivier Sivan, Ingo Heinrich, Frank Riedel, Bernd Kromer, Daniel Balanzategui, Lukas Wacker, Adam Sookdeo, Achim Brauer
- 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 (delta O-18, delta C-13) 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 (delta O-18(sw)) 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 (delta O-18(sw)), with three major downturn phases of increasing magnitude beginning at 12 740 cal BP. The observed variation mostNearly 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 (delta O-18, delta C-13) 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 (delta O-18(sw)) 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 (delta O-18(sw)), 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 delta O-18(sw)) versus Mediterranean (high delta O-18(sw)) 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.…
MetadatenAuthor details: | Maren PaulyGND, Gerhard HelleORCiDGND, Cecile Miramont, Ulf Buentgen, Kerstin Treydte, Frederick Reinig, Frederic Guibal, Olivier Sivan, Ingo HeinrichGND, Frank Riedel, Bernd Kromer, Daniel BalanzateguiORCiD, Lukas Wacker, Adam SookdeoORCiD, Achim BrauerORCiDGND |
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DOI: | https://doi.org/10.1038/s41598-018-32251-2 |
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ISSN: | 2045-2322 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/30228341 |
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Title of parent work (English): | Scientific reports |
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Publisher: | Nature Publ. Group |
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Place of publishing: | London |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2018/09/18 |
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Publication year: | 2018 |
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Release date: | 2021/09/27 |
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Volume: | 8 |
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Number of pages: | 8 |
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Funding institution: | German Research Foundation (DFG)German Research Foundation (DFG) [HE3089/9-1, KR726/10-1]; Swiss National Foundation (SNF)Swiss National Science Foundation (SNSF) [200021L_157187/1]; Helmholtz AssociationHelmholtz Association; Czech Republic Grant AgencyGrant Agency of the Czech Republic [17-22102 S] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
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Peer review: | Referiert |
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Publishing method: | Open Access / Gold Open-Access |
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| DOAJ gelistet |
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License (German): | CC-BY - Namensnennung 4.0 International |
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External remark: | Zweitveröffentlichung in der Schriftenreihe Postprints der Universität Potsdam : Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe ; 1135 |
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