Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2689w&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 24, p. 2689-2692
Physics
16
Boreholes, Canada, Land Surface Temperature, Spatial Distribution, Temperature Gradients, Climate Change, Global Warming, Temperature Distribution
Scientific paper
Because of the perturbation caused by a recent climatic warming, most borehole temperature-depth profiles in Canada show reduced or negative gradients at shallow depths. However, the onset time and magnitude of the warming are different in eastern and western (British Columbia and southern Yukon) Canada. We determined the average subsurface temperature perturbations associated with the recent warming from borehole data for 34 and 51, respectively, well distributed sites in these two regions of Canada. If the ground surface temperature is assumed to have increased linearly since and onset time, the results indicate that the ground surface has warmed by 1.5 K since the mid-19th century in eastern Canada but only by 0.8 K since the late 19th century in British Columbia and southern Yukon.
Belton David S.
Lewis Trevor J.
Shen P. Y.
Wang Kelin
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