Ramirez et al.,.xlsx ...

• Main Author: Ramirez, Veronica M.
• Format: Dataset
• Language: unknown
• Published: figshare 2023
• Subjects: Isotope geochemistry; Greenland
• Online Access: https://dx.doi.org/10.6084/m9.figshare.24438010.v1; https://figshare.com/articles/dataset/Ramirez_et_al_xlsx/24438010/1

Here, we present a new paleo-rainfall reconstruction based on a speleothem d 18 O record from Colombia, which spans most of the last glacial cycle. Our results suggest that the strength and positioning of the Intertropical Convergence Zone over northern South America were more strongly affected by summer insolation at high northern latitudes than by local insolation during the last glacial cycle, resulting in an antiphased relationship with the climate in Cariaco Basin. New insight into how orbital forcing amplified or dampened Intertropical Convergence Zone precipitation during millennial-scale events, such as Greenland Stadials, Interstadials, and Heinrich events. During Greenland Stadial events, the Intertropical Convergence Zone was positioned close to the latitude of El Peñon, as expressed by very negative d 18 O values. Greenland Interstadial events, on the other hand, are marked by relatively high d 18 O values and reduced rainfall in the El Peñon record, suggesting a northward withdrawal of the ...