Dynamic and thermodynamic influences on precipitation in Northeast Mexico on orbital to millennial timescales.

Autor: Wright KT; Dept. of Earth System Science, University of California, Irvine, 3200 Croul Hall, Irvine, CA, USA. ktwright@uci.edu., Johnson KR; Dept. of Earth System Science, University of California, Irvine, 3200 Croul Hall, Irvine, CA, USA. kathleen.johnson@uci.edu., Marks GS; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA., McGee D; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA., Bhattacharya T; Department of Earth Sciences, Syracuse University, Syracuse, NY, USA., Goldsmith GR; Schmid College of Science and Technology, Chapman University, Orange, CA, USA., Tabor CR; Department of Geosciences, University of Connecticut, Storrs, CT, USA., Lacaille-Muzquiz JL; Independent researcher, Ciudad Mante, Tamaulipas, Mexico., Lum G; Dept. of Earth System Science, University of California, Irvine, 3200 Croul Hall, Irvine, CA, USA., Beramendi-Orosco L; Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de, México, México.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Apr 20; Vol. 14 (1), pp. 2279. Date of Electronic Publication: 2023 Apr 20.
DOI: 10.1038/s41467-023-37700-9
Abstrakt: The timing and mechanisms of past hydroclimate change in northeast Mexico are poorly constrained, limiting our ability to evaluate climate model performance. To address this, we present a multiproxy speleothem record of past hydroclimate variability spanning 62.5 to 5.1 ka from Tamaulipas, Mexico. Here we show a strong influence of Atlantic and Pacific sea surface temperatures on orbital and millennial scale precipitation changes in the region. Multiple proxies show no clear response to insolation forcing, but strong evidence for dry conditions during Heinrich Stadials. While these trends are consistent with other records from across Mesoamerica and the Caribbean, the relative importance of thermodynamic and dynamic controls in driving this response is debated. An isotope-enabled climate model shows that cool Atlantic SSTs and stronger easterlies drive a strong inter-basin sea surface temperature gradient and a southward shift in moisture convergence, causing drying in this region.
(© 2023. The Author(s).)
Databáze: MEDLINE
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