Evidence for recent warming from perturbed geothermal gradients: examples from eastern Canada (original) (raw)
Abstract
Recent variations of the surface temperature of the Earth can be inferred from borehole temperature measurements. Generalized inversion is used to extract the information from the data; the potential of the method is evaluated. Tests were performed with synthetic data to demonstrate the effectiveness of the inversion to recover the gross features of the surface temperature history even when the data are affected by noise and errors. The tests show that it is possible to reconstruct the long term changes in ground temperature during the past 300 years; the resolution decreases with time, in particular if noise and errors must be filtered. Temperature logs, obtained in eastern Canada, and not suspected of being affected by non-climatic factors, have been inverted. The analysis confirms that eastern Canada has experienced warming by 1 to 2°C over the past 100–200 years. The relationship between air and ground temperatures has been examined. In eastern Canada ground temperature follows air temperature closely in summer but stays well above air temperature in winter. The number of days with snow on the ground correlates with the difference between annual mean ground and air temperature.
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References
- Ballard S, Pollack HN, Skinner NJ (1987) Terrestrial heat flow in Botswana and Namibia. J Geophys Res 92:B7, 6291–6300
Google Scholar - Beck AE (1977) Climatically perturbed temperature gradients and their effects on regional and continental heat-flow means. Tectonophys 41:17–39
Google Scholar - Beck AE (1982) Precision logging of temperature gradients and the extraction of past climate. Tectonophys 83:1–11
Google Scholar - Beltrami H, Mareschal JC (1991) Recent warming in eastern Canada: evidence from geothermal measurements. Geophys Res Lett 18:605–608
Google Scholar - Birch F (1948) The effects of pleistocene climatic variations upon geothermal gradients. Am J Sci 246:729–760
Google Scholar - Bullard EC (1939) Heat flow in South Africa. Proc R Soc London A 173:474–502
Google Scholar - Carslaw HS, Jaeger JC (1959) Conduction of heat in solids (2nd Ed) Oxford University Press, Oxford, UK
Google Scholar - Cermak V (1971) Underground temperature and inferred climatic temperature of the past millennium. Paleogeog Paleoclimatol Paleoecol 10:1–19
Google Scholar - Cermak V, Kresl M, Safanda J, Nápoles-Pruna M, Tenreyno-Perez R, Torres-Paz LM, Valdés JJ (1984) First heat flow assessments in Cuba. Tectonophys 103:283–296
Google Scholar - Davis EE, Lewis TJ (1984) Heat flow in a back-arc environment: Intermontane and Omineca Crystalline Belts, southern Canadian Cordillera. Can J Earth Sci 21:715–726
Google Scholar - Hansen J, Lebedeff S (1987) Global trends of measured air-surface temperature. J Geophys Res 92:13345–13372
Google Scholar - Jackson DD (1972) Interpretation of inacurate, insufficient, and inconsistent data. Geophys J Roy Astr Soc 28:97–110
Google Scholar - Jessop A (1971) The distribution of glacial perturbation of heatflow in Canada. Can J Earth Sci 5:61–68
Google Scholar - Karl TR, Tarpey JD, Quayle RG, Diaz HF, Robinson DA, Bradley RS (1989) The recent climate record: what it can and cannot tells us. Rev Geophys 27:3405–3430
Google Scholar - Lachenbruch A, Marshall BV (1986) Changing climate: geothermal evidence from permafrost in the Alaskan Arctic. Science 234:689–696
Google Scholar - Lanczos C (1961) Linear differential operators. D. van Nostrand, New York
Google Scholar - Mareschal JC, Pinet C, Gariépy C, Jaupart C, Bienfait G, Dalla Coletta G, Jolivet J, Lapointe R (1989) New heat flow density and radiogenic heat production data in the Canadian Shield and the Quebec Appalachians. Can J Earth Sci 26:845–852
Google Scholar - Menke W (1989) Geophysical data analysis. International Geophysical Series 45, Academic Press, San Diego
Google Scholar - Nielsen SB, Beck AE (1989) Heat flow density values and paleoclimate determined from stochastic inversion of four temperature-depth profiles from the Superior Province of the Canadian Shield. Tectonophys 164:345–359
Google Scholar - Pinet C, Jaupart C, Mareschal JC, Gariépy C, Bienfait G, Lapointe R (1991) Heat flow and structure of the lithosphere in eastern Canada. J Geophys Res (in press)
- Powell WG, Chapman DS, Balling N, Beck AE (1988) Continental heat flow density. In: Haenel R, Rybach L, Stegena L (eds) Handbook of heat flow density determination. Kluwer Academic Publishers, Dordrecht, The Netherlands, pp 167–222
Google Scholar - Shen PY, Beck AE (1983) Determination of surface temperature history from borehole temperature gradients. J Geophys Res 88:7385–7493
Google Scholar - Shen PY, Beck AE (1991) Least squares inversion in borehole temperature measurements in functional space. J Geophys Res (in press)
- Vasseur G, Bernard P, Van de Meulebrouck J, Kast Y, Jolivet J (1983) Holocene paleotemperatures deduced from geothermal measurements. Paleogeog Paleoclimatol Paleoecol 43:237–259
Google Scholar - Wang K (1991) Estimation of ground temperature history from borehole temperature data. J Geophys Res (in press)
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Author notes
- Jean-Claude Mareschal
Present address: Institut de Physique du Globe, 4, place Jussieu, F-75252, Paris, France
Authors and Affiliations
- GEOTOP, Université du Québec à Montréal, Station A, P.O. Box 8888, H3C 3P8, Montreal, Canada
Jean-Claude Mareschal & Hugo Beltrami
Authors
- Jean-Claude Mareschal
- Hugo Beltrami
Additional information
Contribution to Clima Locarno — Past and Present Climate Dynamics; Conference September 1990, Swiss Academy of Sciences — National Climate-Program
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Mareschal, JC., Beltrami, H. Evidence for recent warming from perturbed geothermal gradients: examples from eastern Canada.Climate Dynamics 6, 135–143 (1992). https://doi.org/10.1007/BF00193525
- Received: 08 February 1991
- Accepted: 12 August 1991
- Issue date: January 1992
- DOI: https://doi.org/10.1007/BF00193525