Abstract
Micrometeorological properties of rubber tree plantation were measured for three years from April 1986 to March 1989 in Hainan Island. Aerodynamic properties such as the effective height, the roughness parameter and zero-plane displacement and the penetration rate of radiation through the rubber tree canopy were clearly changed with fall and elongation of leaves and stems of rubber tree. Albedo of short-wave radiation above the canopy also changed from 10% in winter and spring to 16% in summer and autumn. The latent heat flux above the canopy have decreased drastically after leaf fall and sensible heat increased. The sensible heat flux on the forest floor was very small.through the day. Heat loss due to negative net radiation was compensated by the soil heat flux during the night.
