OBSERVATIONS OF SOLITARY WAVES IN THE STABLE ATMOSPHERIC BOUNDARY-LAYER

Large amplitude, isolated, wave-like phenomena have been observed in t he lowest 40 m of the strongly stably stratified atmospheric boundary layer overlying a coastal Antarctic ice shelf. The waves only occur wh en prevailing wind speeds are low. They always propagate from over the land, with phase speeds exceeding the local mean wind speed. They hav e wavelengths of the order of 200 m. Several examples are described an d a summary of the statistical properties of these waves events is pre sented.