V. M. Ramirez

Universidade de São Paulo

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Francisco W. Cruz

Universidade de São Paulo

Juan Pablo Bernal

Universidad Nacional Autónoma de México

Nicolás M. Stríkis

Universidade de São Paulo

Mathias Vuille

University at Albany, State University of New York

Liliana Corona‐Martínez

Universidad Nacional Autónoma de México

Hai Cheng

Xi'an Jiaotong University

Michael Deininger

Johannes Gutenberg University Mainz

Wei Du

Affiliated Hospital of Southwest Medical University

Patricia Piacsek

Universidad Nacional Autónoma de México

Ernesto Tejedor

Museo Nacional de Ciencias Naturales

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Universidade de São Paulo

Universidad Nacional Autónoma de México

Instituto de Geociencias

Universidade Federal Fluminense

Johannes Gutenberg University Mainz

Hospital Universitário da Universidade de São Paulo

Xi'an Jiaotong University

University at Albany, State University of New York

Albany State University

State University of New York

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Hydroclimate modulation of central-eastern Mexico by the North Atlantic subtropical high since the little ice age

Quaternary Science Reviews (2024)

Patricia Piacsek Juan Pablo Bernal María del Pilar Aliaga-Campuzano Luis Bernardo Chavero Fernanda Lases-Hernández

10.1016/j.quascirev.2024.108981

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Summer insolation controlled movements of Intertropical Convergence Zone during last glacial cycle in northern South America

Communications Earth & Environment (2023)

V. M. Ramirez Francisco W. Cruz Mathias Vuille Valdir F. Novello Nicolás M. Stríkis

Abstract A paradigm in paleoclimatology holds that shifts in the mean position of the Intertropical Convergence Zone were the dominant climatic mechanism controlling rainfall in the tropics during the last glacial period. We present a new paleo-rainfall reconstruction based on speleothem stable oxygen isotopes record from Colombia, which spans most of the last glacial cycle. 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 climate in the Cariaco Basin. Our data also provide new insight into how orbital forcing amplified/dampened Intertropical Convergence Zone precipitation during millennial-scale events. During Greenland Stadial events, the Intertropical Convergence Zone was positioned close to the latitude of El Peñon, as expressed by more negative δ 18 O values. Greenland Interstadial events are marked by relatively high stable oxygen isotope values and reduced rainfall in the El Peñon record, suggesting a northward withdrawal of the Intertropical Convergence Zone. During some Heinrich Stadial events, and especially Heinrich Stadial 1, the Intertropical Convergence Zone must have been displaced away from its modern location near El Peñon, as conditions were very dry at both El Peñon and Cariaco.

Intertropical Convergence Zone

Stadial

Speleothem

Paleoclimatology

Convergence zone

Last Glacial Maximum

10.1038/s43247-023-01124-6

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Citations (5)