Late Weichselian thermal state at the base of the Scandinavian Ice Sheet

• Main Authors: Demezhko, Dmitry Y., Gornostaeva, Anastasia A., Antipin, Alexander N.
• Format: Text
• Language: English
• Published: 2019
• Subjects: geo; envir; Greenland; Ice Sheet
• Online Access: https://doi.org/10.5194/cp-2019-49; https://cp.copernicus.org/preprints/cp-2019-49/

Geothermal estimates of the ground surface temperatures for the last glacial cycle in Northern Europe has been analyzed. During the Middle and Late Weichselian (55–12 kyr BP) a substantial part of this area was covered by the Scandinavian Ice Sheet. The analysis of geothermal data has allowed reconstructing limits of the ice sheet extension and its basal thermal state in the Late Weichselian. Ground surface temperatures outside the ice sheet were extremely low (from −8 to −18 °C). Within the ice sheet, there were both thawed and frozen zones. The revealed temperature pattern is generally consistent with the modern one for the ground surface temperatures in Greenland that makes it possible to consider these ice sheets as analogues. The anomalous climatically induced surface heat flux and orbital insolation of the Earth varied consistently outside the glaciation and independently within the limits of the ice sheet.