Challenging an Ice-Core Paleothermometer

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Science  20 Oct 1995:
Vol. 270, Issue 5235, pp. 444-445
DOI: 10.1126/science.270.5235.444


Temperatures measured in a borehole in the Greenland ice sheet can offer clues about the past history of the Earth's surface temperature and climate. MacAyeal in his Perspective provides background and commentary to accompany a research report by Cuffey et al. which challenges previous climate histories derived from ice-core oxygen isotope data, and offers a new calibration of this “paleothermometer” based on a climate history derived from borehole temperatures.