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Abstract
This study presents a multiproxy speleothem record of past hydroclimate variability in Northeast Mexico spanning 62.5 to 5.1 ka. The record reveals a strong influence of Atlantic and Pacific sea surface temperatures (SSTs) on orbital and millennial-scale precipitation changes, with no clear response to insolation forcing but strong evidence for dry conditions during Heinrich Stadials. An isotope-enabled climate model suggests cool Atlantic SSTs and stronger easterlies drive a southward shift in moisture convergence, leading to drying. This research is crucial for improving climate model projections for Northern Mexico, a region highly vulnerable to hydroclimate shifts.
Publisher
Nature Communications
Published On
Apr 20, 2023
Authors
Kevin T. Wright, Kathleen R. Johnson, Gabriela Serrato Marks, David McGee, Tripti Bhattacharya, Gregory R. Goldsmith, Clay R. Tabor, Jean-Louis Lacaille-Muzquiz, Gianna Lum, Laura Beramendi-Orosco
Tags
hydroclimate variability
speleothem record
Northeast Mexico
sea surface temperatures
precipitation changes
isotope-enabled climate model
Heinrich Stadials

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