Les échanges radiatifs et énergétiques et le bilan thermique du sol en Jamésie

Abstract

Detailed and regular measurements of the components of the radiation and energy balances and of the thermal and water regimes of the soil to a depth of 5 m were conducted from August 1979 to August 1980 in an open pine forest near lac Hélène, Baie James. The results deriving from these measurements indicate that temperature conditions and thus seasonal frost in the ground are explainable in terms of radiative and heat energy exchanges near the surface, of the physical properties of the soil, of snow accumulation, and of water concentrations and movements in the soil. Keywords: surface energy exchanges, ground temperature, seasonal frost penetration.