AS  Vol.2 No.4 , November 2011
Spatial and temporal variability of soil freeze-thaw cycling across Southern Alberta, Canada
Abstract: Soil freeze-thaw cycles play an important role in all aspects of agro-ecosystems, such as crop productivity, the evolution of the soil matrix, including trace-gas emissions. In regions that experience synoptic weather conditions throughout the winter, freeze-thaw cycles generally occur in one of two categories; seasonal or winter cycles. Current soil vegetation atmosphere models (SVAT’s) often include a heat-transport soil freeze-thaw algorithm, but lack detail on complex interactions between the main driving variables. Boundary conditions for these models are often based only on a few climate variables and typically lack regional context. A nested statistical analysis was applied to identify the optimal set of environmental variables (via a stepwise regression selection procedure) to track soil freeze-thaw dynamics. Historical data collected between the years 2006-2009, for 17 long-term climate stations distributed across southern Alberta Canada was utilized. Cross-correlation between wind speed and maximum air temperature identified Chinook-driven freeze-thaw events, with such interaction varying significantly across the region and by soil depth. Climate-soil interactions were most significant predictors of soil temperature during winter months. The seasonal freeze-thaw cycle is estimated to vary between 112 - 131 days, consisting of 12 - 20 winter cycles (1 cm depth), and 1-5 winter cycles (5 cm depth) with average lag time of 26 - 112 days. Freeze-thaw prediction was greatly improved when higher-order climate interaction terms were considered. Our findings highlight the importance for soil-water and more complex ecosystem, SVAT models to better resolve regional-driven climatic trends. Alongside improved representation of regional trends aimed at reducing model-based uncertainty, such efforts are expected to, in tandem, help advance the geostatistical design, and implementation of agroenvironmental monitoring systems that combine in-situ and satellite/remote-sensing derived estimates of near-surface soil moisture.
Cite this paper: nullPhillips, A. and Newlands, N. (2011) Spatial and temporal variability of soil freeze-thaw cycling across Southern Alberta, Canada. Agricultural Sciences, 2, 392-405. doi: 10.4236/as.2011.24051.

[1]   Kreyling, J., Beierkuhnlein, C., Pritsch, K., Schloter, M. and Jentsch, A. (2008) Recurrent soil freeze-thaw cycles enhance grassland productivity. New Phytologist, 177, 938-945. doi:10.1111/j.1469-8137.2007.02309.x

[2]   Chang, C. and Hao, X. (2001) Source of N2O emission from a soil during freezing and thawing. Phyton, 41, 49-60.

[3]   Matzner, E. and Borken, W. (2008) Do freeze-thaw events enhance C and N losses from soils of different ecosystems? A review. European Journal of Soil Science, 59, 274-284. doi:10.1111/j.1365-2389.2007.00992.x

[4]   Bullock, M.S., Larney, F.J., Izaurralde, R.C.S. and Feng, Y. (2001) Overwinter changes in wind erodibility of clay loam soils in Southern Alberta. Soil Science Society of America, 65, 423-430. doi:10.2136/sssaj2001.652423x

[5]   Walker, V.K., Palmer, G.R. and Voordouw, G. (2006) Freeze-thaw tolerance and clues to the winter survival of a soil community. Applied and Environmental Microbiology, 73, 1784-1792. doi:10.1128/AEM.72.3.1784-1792.2006

[6]   Henry, H.A.L. (2008) Climate change and soil freezing dynamics: historical trends and projected changes. Cli- matic Change, 87, 421-434. doi:10.1007/s10584-007-9322-8

[7]   IPCC (2007) Climate change 2007: Synthesis report. In: Pachauri, R.K and Reisinger, A., Eds., 4th Assessment Report of the Intergovernmental Panel on Climate Change IPCC, Geneva, 104.

[8]   Eitzinger, J., Parton, W.J. and Hartman, M. (2000) Im- provment and validation of a daily soil temperature sub- model for freezing/thawing. Soil Science, 165, 525-534. doi: 10.1007/s10584-007-9322-8

[9]   Chen, B., Chen, J.M. and Ju, W. (2007) Remote sens- ing-based ecosystem-atmosphere simulation scheme (EASS)—Model formulation and test with multiple-year data. Ecological Modelling, 209, 277-300. doi: 10.1016/j.ecolmodel.2007.06.032

[10]   Flerchinger, G.N. and Saxton, K.E. (1989) Simultaneous heat and water model of a freezing snow-residue-soil system. I. Theory and development. Transactions of the American Society of Agricultural Engineers, 32, 565- 571.

[11]   Flerchinger, G.N. (2000) The simultaneous heat and wa- ter (SHAW) Model: Technical documentation. Northwest Watershed Research Center, USDA Agricultural Research Service, Boise.

[12]   ?im?nek, J., Sejna, M., Saito, H., Sakai, M. and Genuchten, M.T.V. (2009) The HYDRUS-1D software package for simulating the one-dimensional movement of water, heat, and multiple solutes in variably-saturated media. PC Progress, Prague.

[13]   Nkemdirim, L.C. (1996) Canada’s chinook belt. Inter- national Journal of Climatology, 16, 441-462. doi:10.1002/(SICI)1097-0088(199604)16:4<441::AID-JOC21>3.0.CO;2-T

[14]   Nkemdirim, L.C. (1991) Chinooks and winter evapora- tion. Theoretical and Applied Climatology, 43, 129-136. doi: 10.1007/BF00867470

[15]   Hurrell, J.W. (1996) Influence of variations in ex- tratropical wintertime teleconnections on northern hemis- phere temperature. Geophysical Research Letters, 23, 665-668. doi: 10.1029/96GL00459

[16]   Bonsal, B.R., Prowse, T.D., Duguay, C.R. and Lacroix, M. P. (2006) Impacts of large-scale teleconnections on freshwater-ice break/freeze-up dates over Canada. Journal of Hydrology, 330, 340-353. doi:10.1016/j.jhydrol.2006.03.022

[17]   Smith, N.V., Saatchi, S.S. and Randerson, J.T. (2004) Trends in high northern latitude soil freeze thaw cycles from 1988 to 2002. Journal of Geophysical Research, 109, 1-14. doi:10.1029/2003/2003JD004472

[18]   Baker, D.G. and Ruschy, D.L. (1995). Calculated and measured air and soil freeze thaw frequencies. Journal of Applied Meteorology, 34, 2197-2205. doi:10.1175/1520-0450(1995)034<2197:CAMAAS>2.0.CO;2

[19]   Henry, H.A.L. (2007) Soil freeze-thaw cycle experiments: Trends, methodological weaknesses and suggested improvements. Soil Biology and Biochemistry, 39, 977-986. doi: 10.1016/j.soilbio.2006.11.017

[20]   Groffman, P.M., Driscoll, C.T., Fahey, T.J., Hardy, J.P., Fitzhugh, R.D. and Tierney, G.L. (2001) Colder soils in a warmer world: A snow manipulation study in a northern hardwood forest ecosystem. Biogeochemistry, 56, 135- 150. doi:10.1023/A:1013039830323