Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean
There is limited understanding of temperature and atmospheric circulation changes that accompany an Atlantic Meridional Overturning Circulation (AMOC) slowdown beyond the North Atlantic realm. A Peqi’in Cave (Israel) speleothem dated to the last interglacial period (LIG), 129–116 thousand years ago...
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ftpubman:oai:pure.mpg.de:item_3547633 2023-11-12T04:22:16+01:00 Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean Levy, E. Vonhof, H. Bar-Matthews, M. Martinez-Garcia, A. Ayalon, A. Matthews, A. Silverman, V. Raveh-Rubin, S. Zilberman, T. Yasur, G. Schmitt, M. Haug, G. 2023-08-25 http://hdl.handle.net/21.11116/0000-000D-D3B9-4 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-023-40880-z http://hdl.handle.net/21.11116/0000-000D-D3B9-4 Nature Communications info:eu-repo/semantics/article 2023 ftpubman https://doi.org/10.1038/s41467-023-40880-z 2023-10-30T00:47:20Z There is limited understanding of temperature and atmospheric circulation changes that accompany an Atlantic Meridional Overturning Circulation (AMOC) slowdown beyond the North Atlantic realm. A Peqi’in Cave (Israel) speleothem dated to the last interglacial period (LIG), 129–116 thousand years ago (ka), together with a large modern rainfall monitoring dataset, serve as the base for investigating past AMOC slowdown effects on the Eastern Mediterranean. Here, we reconstruct LIG temperatures and rainfall source using organic proxies (TEX86) and fluid inclusion water d-excess. The TEX86 data show a stepwise cooling from 19.8 ± 0.2° (ca. 128–126 ka) to 16.5 ± 0.6 °C (ca. 124–123 ka), while d-excess values decrease abruptly (ca. 126 ka). The d-excess shift suggests that rainfall was derived from more zonal Mediterranean air flow during the weakened AMOC interval. Decreasing rainfall d-excess trends over the last 25 years raise the question whether similar atmospheric circulation changes are also occurring today. Article in Journal/Newspaper North Atlantic Max Planck Society: MPG.PuRe Nature Communications 14 1 |
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Max Planck Society: MPG.PuRe |
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English |
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There is limited understanding of temperature and atmospheric circulation changes that accompany an Atlantic Meridional Overturning Circulation (AMOC) slowdown beyond the North Atlantic realm. A Peqi’in Cave (Israel) speleothem dated to the last interglacial period (LIG), 129–116 thousand years ago (ka), together with a large modern rainfall monitoring dataset, serve as the base for investigating past AMOC slowdown effects on the Eastern Mediterranean. Here, we reconstruct LIG temperatures and rainfall source using organic proxies (TEX86) and fluid inclusion water d-excess. The TEX86 data show a stepwise cooling from 19.8 ± 0.2° (ca. 128–126 ka) to 16.5 ± 0.6 °C (ca. 124–123 ka), while d-excess values decrease abruptly (ca. 126 ka). The d-excess shift suggests that rainfall was derived from more zonal Mediterranean air flow during the weakened AMOC interval. Decreasing rainfall d-excess trends over the last 25 years raise the question whether similar atmospheric circulation changes are also occurring today. |
format |
Article in Journal/Newspaper |
author |
Levy, E. Vonhof, H. Bar-Matthews, M. Martinez-Garcia, A. Ayalon, A. Matthews, A. Silverman, V. Raveh-Rubin, S. Zilberman, T. Yasur, G. Schmitt, M. Haug, G. |
spellingShingle |
Levy, E. Vonhof, H. Bar-Matthews, M. Martinez-Garcia, A. Ayalon, A. Matthews, A. Silverman, V. Raveh-Rubin, S. Zilberman, T. Yasur, G. Schmitt, M. Haug, G. Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean |
author_facet |
Levy, E. Vonhof, H. Bar-Matthews, M. Martinez-Garcia, A. Ayalon, A. Matthews, A. Silverman, V. Raveh-Rubin, S. Zilberman, T. Yasur, G. Schmitt, M. Haug, G. |
author_sort |
Levy, E. |
title |
Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean |
title_short |
Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean |
title_full |
Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean |
title_fullStr |
Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean |
title_full_unstemmed |
Weakened AMOC related to cooling and atmospheric circulation shifts in the last interglacial Eastern Mediterranean |
title_sort |
weakened amoc related to cooling and atmospheric circulation shifts in the last interglacial eastern mediterranean |
publishDate |
2023 |
url |
http://hdl.handle.net/21.11116/0000-000D-D3B9-4 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Nature Communications |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-023-40880-z http://hdl.handle.net/21.11116/0000-000D-D3B9-4 |
op_doi |
https://doi.org/10.1038/s41467-023-40880-z |
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Nature Communications |
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14 |
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1 |
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1782337350943113216 |