Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years
Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ18O values of our speleothems are shown t...
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ftpubman:oai:pure.mpg.de:item_3028253 2023-08-20T04:08:15+02:00 Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years Brahim, Y. Wassenburg, J. Cruz, F. Sifeddine, A. Scholz, D. Bouchaou, L. Dassie, E. Jochum, K. Edwards, R. Cheng, H. 2018 http://hdl.handle.net/21.11116/0000-0003-07B9-5 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-018-35498-x http://hdl.handle.net/21.11116/0000-0003-07B9-5 Scientific Reports info:eu-repo/semantics/article 2018 ftpubman https://doi.org/10.1038/s41598-018-35498-x 2023-08-01T23:49:07Z Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ18O values of our speleothems are shown to be dominated by the main mode of decadal variability in the North Atlantic region: the North Atlantic Oscillation (NAO). Statistical analyses confirm the previously reported multi-decadal variability related to the influence of the Atlantic Multidecadal Oscillation (AMO) in the region. High power and persistent centennial-scale periodicities, similar to the Vries-Suess 200-year solar cycle, are observed as well. Indeed, comparison between solar activity reconstructions and our record confirms the in-phase relationship on centennial time-scales. Low δ18O values, and hence negative phases of NAO that bring precipitation towards the Western Mediterranean, are observed during well-known solar minima periods. The results are consistent with previous models which describe low irradiance as a trigger for southward shifts of precipitation-bearing westerlies during winter. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Max Planck Society: MPG.PuRe Scientific Reports 8 1 |
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Max Planck Society: MPG.PuRe |
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English |
description |
Here we present a new composite record from two well-dated speleothem records from two caves in Northern Morocco. The high-resolution record covers the last millennium allowing to detect multi-decadal to centennial periodicities. Over the industrial period, δ18O values of our speleothems are shown to be dominated by the main mode of decadal variability in the North Atlantic region: the North Atlantic Oscillation (NAO). Statistical analyses confirm the previously reported multi-decadal variability related to the influence of the Atlantic Multidecadal Oscillation (AMO) in the region. High power and persistent centennial-scale periodicities, similar to the Vries-Suess 200-year solar cycle, are observed as well. Indeed, comparison between solar activity reconstructions and our record confirms the in-phase relationship on centennial time-scales. Low δ18O values, and hence negative phases of NAO that bring precipitation towards the Western Mediterranean, are observed during well-known solar minima periods. The results are consistent with previous models which describe low irradiance as a trigger for southward shifts of precipitation-bearing westerlies during winter. |
format |
Article in Journal/Newspaper |
author |
Brahim, Y. Wassenburg, J. Cruz, F. Sifeddine, A. Scholz, D. Bouchaou, L. Dassie, E. Jochum, K. Edwards, R. Cheng, H. |
spellingShingle |
Brahim, Y. Wassenburg, J. Cruz, F. Sifeddine, A. Scholz, D. Bouchaou, L. Dassie, E. Jochum, K. Edwards, R. Cheng, H. Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years |
author_facet |
Brahim, Y. Wassenburg, J. Cruz, F. Sifeddine, A. Scholz, D. Bouchaou, L. Dassie, E. Jochum, K. Edwards, R. Cheng, H. |
author_sort |
Brahim, Y. |
title |
Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years |
title_short |
Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years |
title_full |
Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years |
title_fullStr |
Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years |
title_full_unstemmed |
Multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the Western Mediterranean during the last 1000 years |
title_sort |
multi-decadal to centennial hydro-climate variability and linkage to solar forcing in the western mediterranean during the last 1000 years |
publishDate |
2018 |
url |
http://hdl.handle.net/21.11116/0000-0003-07B9-5 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Scientific Reports |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-018-35498-x http://hdl.handle.net/21.11116/0000-0003-07B9-5 |
op_doi |
https://doi.org/10.1038/s41598-018-35498-x |
container_title |
Scientific Reports |
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8 |
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1 |
_version_ |
1774720426509860864 |