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<p>Marking the transition between the last glacial and Holocene, the last deglaciation featured rapid climate shifts including Heinrich event 1 and the Bølling–Allerød. This study presents the highest-resolution, continuous hydroclimate proxy records of this interval from the tropical Americas based on a precisely dated Cuban stalagmite. The records span 17.6–14.3 thousand years before present, revealing persistent interannual to multidecadal rainfall variability, attributed to El Niño-Southern Oscillation and Atlantic Multidecadal Variability. Broader centennial to millennial-scale trends are linked to major climate events. We observe peak aridity in western Cuba during Heinrich&#xa0;event 1.1 and 1.2 (~16.2 and ~15.1 thousand years before present), with preceding dry periods within chronological uncertainty, suggesting synchronicity. Wetter conditions and increased growth rates follow during the Bølling–Allerød. Model-based rainfall estimates support these results. Our proxy data highlight the dynamic nature of tropical hydroclimate, demonstrating wet and dry conditions fluctuate across timescales, despite climate state.</p>

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Hydroclimate variability in the northern Caribbean during the last deglaciation was modulated by large-scale atmospheric circulation and climate events

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • Leah Travis-Taylor,
  • Martín Medina-Elizalde,
  • Jesús M. Pajón,
  • Ambarish V. Karmalkar,
  • Josué M. Polanco-Martínez,
  • Christopher W. Kinsley,
  • David McGee

摘要

Marking the transition between the last glacial and Holocene, the last deglaciation featured rapid climate shifts including Heinrich event 1 and the Bølling–Allerød. This study presents the highest-resolution, continuous hydroclimate proxy records of this interval from the tropical Americas based on a precisely dated Cuban stalagmite. The records span 17.6–14.3 thousand years before present, revealing persistent interannual to multidecadal rainfall variability, attributed to El Niño-Southern Oscillation and Atlantic Multidecadal Variability. Broader centennial to millennial-scale trends are linked to major climate events. We observe peak aridity in western Cuba during Heinrich event 1.1 and 1.2 (~16.2 and ~15.1 thousand years before present), with preceding dry periods within chronological uncertainty, suggesting synchronicity. Wetter conditions and increased growth rates follow during the Bølling–Allerød. Model-based rainfall estimates support these results. Our proxy data highlight the dynamic nature of tropical hydroclimate, demonstrating wet and dry conditions fluctuate across timescales, despite climate state.