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Showing 1–4 of 4 results
Advanced filters: Author: P.-H. Blard Clear advanced filters

  • Glacial moraines (rocky deposits left behind by glaciers) on Mauna Kea volcano, Hawaii are dated to reveal the timing of glacier retreat during the last deglaciation, and a model of glacier extent is used to estimate the temperature changes associated with this retreat. It is found that temperatures at high elevations in the central Pacific were about seven degrees Celsius colder than today during the Last Glacial Maximum, which indicates that the lapse rate was higher than at present.

    • P.-H. Blard
    • J. Lavé
    • D. Bourlès
    Research
    Nature
    Volume: 449, P: 591-594

  • A moraine chronology determined by surface exposure dating shows that glaciers in the northern tropical Andes expanded to a larger extent during the Antarctic cold reversal (14,500 to 12,900 years ago) than during the Younger Dryas stadial (12,800 to 11,500 years ago), contrary to previous studies; as a result, previous chronologies and climate interpretations from tropical glaciers may need to be revisited.

    • V. Jomelli
    • V. Favier
    • B. L. Otto-Bliesner
    Research
    Nature
    Volume: 513, P: 224-228