Temperature and heat flux changes at the base of Laurentide ice sheet inferred from geothermal data (evidence from province of Alberta, Canada)

Demezhko, D. Yu.; Gornostaeva, A. A.; Majorowicz, Jacek; Šаfanda, Jan

doi:10.1007/s00531-017-1464-y

Cited by 4 publications

(3 citation statements)

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“…The exception is the data from central Finland (the Outokumpu borehole) where solar impact is probably implemented through changes of the thermomechanical properties of the glacier. We observed such coincidence of SHF and insolation variations on the territory of the Laurentide ice sheet (the Hunt Well - Demezhko et al, 2018). However further studies are needed to investigate the mechanism of such coincidence under the ice sheet.…”

Section: Resultsmentioning

confidence: 61%

“…Geothermal heat flow is positive in an upward direction (from depth (Demezhko, Gornostaeva, 2015a,b). However, we observed such synchronicity on the territory of the Laurentide ice sheet too (Demezhko et al, 2018). In (Demezhko, Gornostaeva, 2015a,b) the ratio of the SHF to the insolation change was proposed to be considered as the Earth's climate sensitivity.…”

Section: Distribution Of the Ground Surface Heat Fluxesmentioning

confidence: 65%

“…The climate sensitivity value for this region amounts to 0.6%. By comparison, the climate sensitivity was estimated at 1.3-1.5% in the Middle Urals (Demezhko, Gornostaeva, 2015a,b) and at about 1% in Canadian province of Alberta under the ice sheet (Demezhko et al, 2018).…”

Section: Distribution Of the Ground Surface Heat Fluxesmentioning

confidence: 99%

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

Demezhko

Gornostaeva

Antipin

2019

Preprint

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Abstract. 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.

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Section: Resultsmentioning

confidence: 61%

Section: Distribution Of the Ground Surface Heat Fluxesmentioning

confidence: 65%