Radiosondes South America 13 Troposphere 8 Climatology 6 Single tropopause 6 climatology 6 tropopause 6 Atmospheric temperature 4 Climatological fields 4 Diurnal cycle 4 Double tropopause 4 Errors 4 Extratropical tropopause layer 4 High resolution 4 La Plata Basin 4 Mathematical models 4 Mesoscale 4 Rawinsonde 4 Seasonality 4 Stratosphere 4 Thermal contrasts 4 Tropopause climatology 4 Upper atmosphere 4 Upper boundary 4 Weather forecasting 4 Wind 4 Wind directions 4 Wind effects 4 Wind speed 4 boundary layer 4