Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
© Author(s) 2006. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
07 Nov 2006
Review status
This discussion paper is a preprint. It has been under review for the journal Climate of the Past (CP). The revised manuscript was not accepted.
Differences between repeated borehole temperature logs in the southern Canadian Prairies-validating borehole climatology
J. Majorowicz1,4, W. Skinner2, J. Safanda3, and W. Gosnold4 1Northern Geothermal, 105 Carlson Close, Edmonton, Alberta, T6R 2J8, Canada
2Climate Research Division, Environment Canada, Toronto, Ontario, M3H 5T4, Canada
3Geophysical Institute, Prague, Czech Republic
4University of North Dakota, Northern Plains Climate Research Centre, Grand Forks, ND, USA
Abstract. Temperature-depth (T-z) profiles from twenty-four shallow boreholes of less than 250 m in depth located in flat, semi-arid areas of the southern Canadian Prairie Provinces initially measured in the late 1980's and early 1990's and repeated between 2004 and 2006 show strong ground surface temperature (GST) warming signatures. GST changes of 0.1–0.2°C, and 0.4°C, are observed between the measurements for the shorter (decade) and longer (two decades) time spans, respectively. Borehole sites with repeated temperature logs are selected to demonstrate that multiple T-z profiles provide general agreement between GST warming and observed surface air temperature (SAT) warming measured at nearby historical climate stations. A comparison of measured changes from repeated temperature logs with those simulated from SAT forcing demonstrates the influence of SAT on the observed deviation of temperature with depth despite variations in snow cover. Repeated borehole measurements from the northern Great Plains of the USA also identify a similar positive temperature change but of lower magnitude. Temperature changes since 1900 in the southern Canadian Prairies and the adjoining northern Great Plains of the USA, as derived from the functional state inversion (FSI) of deeper borehole logs, average 2.5°C but show a strong latitudinal gradient.

Citation: Majorowicz, J., Skinner, W., Safanda, J., and Gosnold, W.: Differences between repeated borehole temperature logs in the southern Canadian Prairies-validating borehole climatology, Clim. Past Discuss.,, 2006.
J. Majorowicz et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
RC S604: 'Review', Anonymous Referee #1, 21 Nov 2006 Printer-friendly Version 
RC S786: 'Comment on data and analysis:', Anonymous Referee #3, 15 Jan 2007 Printer-friendly Version 
AC S866: 'validating borehole climatology', Jacek Majorowicz, 06 Feb 2007 Printer-friendly Version 
J. Majorowicz et al.
J. Majorowicz et al.


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