Estimation of turbulent heat fluxes and exchange coefficients for heat at Dumont d'Urville, East Antarctica

Simultaneous acoustic Doppler sodar and tethersonde measurements were used to study some of the characteristics of the unstable boundary layer at Dumo nt d'Urville, Adelie Land, East Antarctica during the summer 1993-94. A des cription of the convective boundary layer and its behaviour in connection w ith the wind regime is given along with the frequency distribution of free convection episodes. The surface heat flux has been evaluated using the ver tical velocity variance derived from sodar measurements. The turbulent exch ange coefficients, estimated by coupling sodar and tethered balloon measure ments, are in strong agreement with those present in literature for the Ant arctic regions.