CGRG Bibliography of Canadian Geomorphology
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Author : Gosselin, C.; Mareschal, J.; Rolandone, F.; and Jaupart, C.
Date : 2000.
Title : Ground surface temperature variations near Thompson, Manitoba: Environment and climate changes.
Publication : American Geophysical Union Fall Meeting, December 15-19, 2000. San Francisco, California.
Issue :
Page(s) :
Abstract
Several temperature depth profiles recorded at Pipe Mine, 25km south of Thompson, Manitoba, exhibit a marked departure from the equilibrium gradient. It could be interpreted as indicating extremely strong warming (approx 5K) of the ground surface during the last 100 years. There was no human activity in this part of Manitoba before the development of the mining camp of Thompson in the 1950s. The drillholes are located within 500m of the highway and power lines build in 1955 and at approx 3 km from the mine. All the temperature profiles show similar perturbations regardless of distance to the highway and power lines. Temperature profiles recorded in the vicinity of Thompson show a moderate warming trend while temperature profiles at Soab, 40km south of Pipe Mine, show no sign of recent warming. \par Detailed interpretation and inversion of the temperature profiles at Pipe suggest that a recent (50 years) and strong (3K) ground surface warming is superposed to a 1-2K warming trend that started 150 years ago. The latter trend is similar to that inferred from the interpretation of some 10 temperature-depth profiles from northern Manitoba and Saskatchewan.
Bibliography of Canadian Geomorphology