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Persistence of full glacial conditions in the central Pacific until 15,000 years ago

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  • P.-H. Blard

    (Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement, CNRS – Aix Marseille Université
    Centre de Recherches Pétrographiques et Géochimiques, CNRS
    Present addresses: Geological and Planetary Science Division, California Institute of Technology, MC 100-23, 1200 E. California Boulevard, Pasadena, California 91125, USA (P.-H.B.); Centre de Recherches Pétrographiques et Géochimiques, CNRS, 54501 Vandoeuvre-lès-Nancy, France (J.L.).)

  • J. Lavé

    (Laboratoire de Géodynamique des Chaînes Alpines, CNRS – Université Joseph Fourier
    Present addresses: Geological and Planetary Science Division, California Institute of Technology, MC 100-23, 1200 E. California Boulevard, Pasadena, California 91125, USA (P.-H.B.); Centre de Recherches Pétrographiques et Géochimiques, CNRS, 54501 Vandoeuvre-lès-Nancy, France (J.L.).)

  • R. Pik

    (Centre de Recherches Pétrographiques et Géochimiques, CNRS)

  • P. Wagnon

    (Institut de Recherche Pour le Développement, Great Ice, Laboratoire de Glaciologie et Géophysique de l’Environnement)

  • D. Bourlès

    (Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement, CNRS – Aix Marseille Université)

Abstract

Cooling the tropics Little is known about climatic conditions in the tropics during the last glacial period and the deglaciation that followed. Now by dating glacial moraines — rocky deposits left by glaciers — on Mauna Kea volcano, Hawaii, Pierre-Henri Blard et al. have determined the timing of the glacier retreat. Using a model of glacier extent to estimate the temperature changes associated with this retreat, they find that temperatures at high elevations in the central Pacific were about 7 °C colder than today during the Last Glacial Maximum. Full glacial conditions appear to have persisted in the region until about 15,000 years ago. This pattern is similar to that seen in Greenland, suggesting that there was an atmospheric link between the central Pacific and North Atlantic during the last deglaciation.

Suggested Citation

  • P.-H. Blard & J. Lavé & R. Pik & P. Wagnon & D. Bourlès, 2007. "Persistence of full glacial conditions in the central Pacific until 15,000 years ago," Nature, Nature, vol. 449(7162), pages 591-594, October.
    • Handle: RePEc:nat:nature:v:449:y:2007:i:7162:d:10.1038_nature06142
    DOI: 10.1038/nature06142
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