The Zonal Flow of the Free Atmosphere Between 10N and 80S, in the South American Sector

Abstract

Data from all available sources have been used to construct vertical cross sections of the seasonal mean flow of the atmosphere between 900 and 30 mb, over the western and southern part of South America. Monthly zonal wind profiles are presented for the subpolar region where the stratospheric circumpolar westerlies in late winter are strongest. For these latitudes, an extrapolation of the zonal wind up to the 10-mb level is attempted.