Nonlinear Processes in Geophysics www.nonlin-processes-geophys.net 1023-5809 1607-7946 15 3 2008 10.5194/npg-15-409-2008 http://www.nonlin-processes-geophys.net/15/409/2008/ http://www.nonlin-processes-geophys.net/15/409/2008/npg-15-409-2008.html http://www.nonlin-processes-geophys.net/15/409/2008/npg-15-409-2008.pdf 409 416 2008-05-23 Non-stationary temporal characterization of the temperature profile of a soil exposed to frost in south-eastern Canada F. Anctil francois.anctil@gci.ulaval.ca A. Pratte L. E. Parent M. A. Bolinder Department of Civil Engineering, Université Laval, Québec, Canada Department of Soils and Agrifood Engineering, Université Laval, Québec, Canada The objective of this work was to compare time and frequency fluctuations of air and soil temperatures (2-, 5-, 10-, 20- and 50-cm below the soil surface) using the continuous wavelet transform, with a particular emphasis on the daily cycle. 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