Subsurface temperature signature of a large Pleistocene - Holocene surface warming in the North Alberta, Canada
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Majorowicz, J., Šafanda, J., Gosnold, W. & Unsworth, M. 2012. Subsurface temperature signature of a large Pleistocene - Holocene surface warming in the North Alberta, Canada, Geophysical Research Abstracts Vol. 14, EGU2012-6252, 2012 EGU General Assembly 2012.
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Recent results from a 2.3km deep temperature log in northern Alberta, Canada acquired as part of the University of Alberta Helmholtz-Alberta Initiative (HAI) geothermal energy project in 2010-2011shows that there is a significant increase in thermal gradient in the granites. Inversion of the measured T-z profile between 550 - 2320 m indicates a temperature increase of 9.6 ± 0.3 °C, at 13.0 ± 0.6 ka and that the glacial base surface temperature was - 4.4± 0.3 °C. This inversion computation accounted for granite heat production of 3 µW/m3. This is the largest amplitude of Pleistocene - Holocene surface warming in Canada inferred from borehole temperature logs, and is compatible with the results of similar studies in Eurasia (KTB, Outokumpu, Torun-1 etc.) reported previously.
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http://purl.org/coar/resource_type/c_1843
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© 2012 Copernicus. The version of this abstract is open access and can be downloaded and shared. The original author(s) and source must be cited.
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en