Comparison between measured and theoretical temperature profiles of the Camp Century, Greenland, borehole
By: by J. Weertman
Contributors: Cold Regions Research and Engineering Laboratory (U.S.)
Series: Research report -- 246; Research report (Cold Regions Research and Engineering Laboratory (U.S.)) -- 246
Publisher: U.S. Army Materiel Command, Cold Regions Research & Engineering Laboratory
Published: 1968
Place of publication: Hanover, N.H
Language: eng
Number of pages: 13
Subjects: Glaciers; Temperature; Snow; Ice
Description: Steady-state temperature profiles are calculated for the borehole drilled through the Greenland ice sheet at Camp Century. The profiles are found by modifying Robin's theory through the addition of several correction terms. One of these terms is the internal heating arising from creep deformation. The importance of this term was emphasized by Lliboutry. The new theoretical profiles do not differ appreciably from the profile derived from Robin's theory. The theoretical profiles do differ substantially from the Camp Century profile measured by Hansen. It is concluded that Hansen's observations are evidence that factors such as accumulation rate and the upper surface temperature are not in a long-term steady-state condition. Better agreement between theoretical and measured curves is obtained if it is assumed that the accumulation rate was about 40% smaller in the past and that the mean annual surface temperature varied by about 0.5C over the past 1000 years. (Author).
Notes: "May 1968."

"DA task 1T014501B52A02."

Includes bibliographical references (p. 13).