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Initiation of a stable convective hydroclimatic regime in Central America circa 9000 years BP

Author

Listed:
  • Amos Winter

    (Indiana State University
    University of Puerto Rico)

  • Davide Zanchettin

    (Department of Environmental Sciences, Informatics and Statistics)

  • Matthew Lachniet

    (University of Nevada Las Vegas)

  • Rolf Vieten

    (University of Puerto Rico
    Hebrew University of Jerusalem)

  • Francesco S. R. Pausata

    (University of Quebec in Montreal)

  • Fredrik Charpentier Ljungqvist

    (Stockholm University
    Stockholm University)

  • Hai Cheng

    (University of Minnesota
    Xi’an Jiaotong University)

  • R. Lawrence Edwards

    (University of Minnesota)

  • Thomas Miller

    (University of Puerto Rico)

  • Sara Rubinetti

    (University of Torino
    Istituto Nazionale di Astrofsica, Osservatorio Astrofisico di Torino (OATo-INAF))

  • Angelo Rubino

    (Department of Environmental Sciences, Informatics and Statistics)

  • Carla Taricco

    (University of Torino
    Istituto Nazionale di Astrofsica, Osservatorio Astrofisico di Torino (OATo-INAF))

Abstract

Many Holocene hydroclimate records show rainfall changes that vary with local orbital insolation. However, some tropical regions display rainfall evolution that differs from gradual precessional pacing, suggesting that direct rainfall forcing effects were predominantly driven by sea-surface temperature thresholds or inter-ocean temperature gradients. Here we present a 12,000 yr continuous U/Th-dated precipitation record from a Guatemalan speleothem showing that Central American rainfall increased within a 2000 yr period from a persistently dry state to an active convective regime at 9000 yr BP and has remained strong thereafter. Our data suggest that the Holocene evolution of Central American rainfall was driven by exceeding a temperature threshold in the nearby tropical oceans. The sensitivity of this region to slow changes in radiative forcing is thus strongly mediated by internal dynamics acting on much faster time scales.

Suggested Citation

  • Amos Winter & Davide Zanchettin & Matthew Lachniet & Rolf Vieten & Francesco S. R. Pausata & Fredrik Charpentier Ljungqvist & Hai Cheng & R. Lawrence Edwards & Thomas Miller & Sara Rubinetti & Angelo , 2020. "Initiation of a stable convective hydroclimatic regime in Central America circa 9000 years BP," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14490-y
    DOI: 10.1038/s41467-020-14490-y
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    Cited by:

    1. 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-O, 2023. "Dynamic and thermodynamic influences on precipitation in Northeast Mexico on orbital to millennial timescales," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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