Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9)
Abstract We present a speleothem record from western Cuba, spanning the period 98.7–84.9 ka BP. Our record shows two distinctive periods of high δ18O corresponding to dry and/or cold periods during 85–87.6 and 90.2–93.1 ka BP, synchronous with Heinrich events 8 and 9 (H8 and H9). Hence, we provide t...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-24610-x |
| _version_ | 1811315418745274368 |
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| author | Yassine Ait Brahim Matthew C. Peros André E. Viau Mercedes Liedtke Jesús M. Pajón Julio Valdes Xianglei Li R. Lawrence Edwards Eduard G. Reinhardt Frank Oliva |
| author_facet | Yassine Ait Brahim Matthew C. Peros André E. Viau Mercedes Liedtke Jesús M. Pajón Julio Valdes Xianglei Li R. Lawrence Edwards Eduard G. Reinhardt Frank Oliva |
| author_sort | Yassine Ait Brahim |
| collection | DOAJ |
| description | Abstract We present a speleothem record from western Cuba, spanning the period 98.7–84.9 ka BP. Our record shows two distinctive periods of high δ18O corresponding to dry and/or cold periods during 85–87.6 and 90.2–93.1 ka BP, synchronous with Heinrich events 8 and 9 (H8 and H9). Hence, we provide the first proxy evidence of the local Caribbean climate response to H8 and H9. Interestingly, H8 is more pronounced compared to H9, which may be a local response to lower temperatures in the North Atlantic resulting in a weak AMOC and reduced deep water formation, therefore a stronger south shift of the ITCZ. Our data complement existing speleothem records from western Cuba which, collectively, provide a nearly continuous paleoclimate time-series spanning the last 100 ka BP, indicating a consistent response to millennial-scale events as dry and/or cooler conditions. The comparison with regional paleoclimate records reveals an anti-phased relationship with South America, caused by the southern movements of the ITCZ during millennial-scale events which lead to dry conditions in the Caribbean and a stronger South American Monsoon System. |
| first_indexed | 2024-04-13T11:29:42Z |
| format | Article |
| id | doaj.art-83fee4b8cddf41a6b2904523ad946ab2 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T11:29:42Z |
| publishDate | 2022-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-83fee4b8cddf41a6b2904523ad946ab22022-12-22T02:48:35ZengNature PortfolioScientific Reports2045-23222022-12-0112111210.1038/s41598-022-24610-xHydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9)Yassine Ait Brahim0Matthew C. Peros1André E. Viau2Mercedes Liedtke3Jesús M. Pajón4Julio Valdes5Xianglei Li6R. Lawrence Edwards7Eduard G. Reinhardt8Frank Oliva9International Water Research Institute, Mohammed VI Polytechnic UniversityDepartment of Environment and Geography, Bishop’s UniversityLaboratory for Climate Change Research (LCC), Department of Geography, Environment and Geomatics, University of OttawaLaboratory for Climate Change Research (LCC), Department of Geography, Environment and Geomatics, University of OttawaDepartment of Paleogeography and Paleobiology, Museo Nacional de Historia Natural de CubaDigital Technologies Research Centre, Data Science for Complex Systems Team M50, National Research Council CanadaInstitute of Earth Environment, Chinese Academy of SciencesDepartment of Earth Sciences, University of MinnesotaSchool of Earth, Environment, and Society, McMaster UniversityLaboratory for Climate Change Research (LCC), Department of Geography, Environment and Geomatics, University of OttawaAbstract We present a speleothem record from western Cuba, spanning the period 98.7–84.9 ka BP. Our record shows two distinctive periods of high δ18O corresponding to dry and/or cold periods during 85–87.6 and 90.2–93.1 ka BP, synchronous with Heinrich events 8 and 9 (H8 and H9). Hence, we provide the first proxy evidence of the local Caribbean climate response to H8 and H9. Interestingly, H8 is more pronounced compared to H9, which may be a local response to lower temperatures in the North Atlantic resulting in a weak AMOC and reduced deep water formation, therefore a stronger south shift of the ITCZ. Our data complement existing speleothem records from western Cuba which, collectively, provide a nearly continuous paleoclimate time-series spanning the last 100 ka BP, indicating a consistent response to millennial-scale events as dry and/or cooler conditions. The comparison with regional paleoclimate records reveals an anti-phased relationship with South America, caused by the southern movements of the ITCZ during millennial-scale events which lead to dry conditions in the Caribbean and a stronger South American Monsoon System.https://doi.org/10.1038/s41598-022-24610-x |
| spellingShingle | Yassine Ait Brahim Matthew C. Peros André E. Viau Mercedes Liedtke Jesús M. Pajón Julio Valdes Xianglei Li R. Lawrence Edwards Eduard G. Reinhardt Frank Oliva Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9) Scientific Reports |
| title | Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9) |
| title_full | Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9) |
| title_fullStr | Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9) |
| title_full_unstemmed | Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9) |
| title_short | Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9) |
| title_sort | hydroclimate variability in the caribbean during north atlantic heinrich cooling events h8 and h9 |
| url | https://doi.org/10.1038/s41598-022-24610-x |
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