Past Temperatures Directly from the Greenland Ice Sheet Journal Article uri icon

Overview

abstract

  • A Monte Carlo inverse method has been used on the temperature profiles measured down through the Greenland Ice Core Project (GRIP) borehole, at the summit of the Greenland Ice Sheet, and the Dye 3 borehole 865 kilometers farther south. The result is a 50,000-year-long temperature history at GRIP and a 7000-year history at Dye 3. The Last Glacial Maximum, the Climatic Optimum, the Medieval Warmth, the Little Ice Age, and a warm period at 1930 A.D. are resolved from the GRIP reconstruction with the amplitudes –23 kelvin, +2.5 kelvin, +1 kelvin, –1 kelvin, and +0.5 kelvin, respectively. The Dye 3 temperature is similar to the GRIP history but has an amplitude 1.5 times larger, indicating higher climatic variability there. The calculated terrestrial heat flow density from the GRIP inversion is 51.3 milliwatts per square meter.

publication date

  • October 9, 1998

has restriction

  • closed

Date in CU Experts

  • January 25, 2017 12:47 PM

Full Author List

  • Dahl-Jensen D; Mosegaard K; Gundestrup N; Clow GD; Johnsen SJ; Hansen AW; Balling N

author count

  • 7

Other Profiles

International Standard Serial Number (ISSN)

  • 0036-8075

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

Additional Document Info

start page

  • 268

end page

  • 271

volume

  • 282

issue

  • 5387