Doppler Sodar observations of the boundary-layer parameters and a frontal system during the “Mesogers 84” experiment

Evolution of some boundary-layer parameters mainly estimated with a Doppler Sodar during perturbed meteorological situation is examined during the Mesogers 84 experiment. A case study of the sodar detection of frontal evolution and the prevailing wind field is presented in conjunction with the surface network measurements. The frontal boundary-layer signature has been observed to be structured into two strong shear layers in the ABL. At the surface, several modifications of the boundary-layer parameters are noticed well in advance of the frontal onset.