A CASE-STUDY OF TURBULENT PARAMETERS DURING THE ANTARCTIC WINTER

Two days of the Antarctic winter (20 and 21 June 1986) were chosen to study some turbulent parameters in this particular boundary-layer. Ric hardson number, Monin-Obukhov length, eddy transfer coefficients, turb ulent kinetic energy, turbulent intensities, friction velocities and s ensible heat flux at three levels (5, 17 and 32 m) were considered. Th e results show how the stability at 17 and 32 m influences the turbule nt transfer at 5 m. The shear of wind is the main mechanism to produce mixing in the lower atmosphere at Antarctica, and thermal inversions associated to surface cooling develop with winds < 10 m(s-1) at 5 m. T he possible influence of internal gravity-waves on the atmospheric bou ndary-layer during strong stable stratification is studied.