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
