A property of water in porous materials is that it freezes at temperatures below 0 deg C. There is no single freezing temperature for water in soils. As ice is formed the freezing point of the decreasing quantity of unfrozen water falls further below 0 deg C. Latent heat of fusion is thus involved in temperature changes over a range extending to several degrees below 0 deg C. The latent heat and specific heat together constitute an apparent specific heat. Apparent specific heats for various silt, clay and organic soils have been measured in a calorimeter. The apparent specific heats generally rise as temperatures approach 0 deg C, and in a clay soil may be ten times as great at minus 1 deg C as at minus 5 deg C. The apparent specific heats for a given temperature depend on whether the soil is freezing or thawing, and on various other factors. The precise determination of heat quantities involved in temperature changes in soil in situ in difficult, mainly because of the several factors influencing the freezing of the soil moisture. /Author/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 133-142
  • Serial:
    • Volume: 14
    • Issue Number: 2
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00265037
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM