A time series of aerological data for the 1972-1989 period was used in order to obtain a climatology of the free atmosphere over Costa Rica, actualizing and complementing a previous study (Grandoso et al., 1981).
The analyzed dynamic and thermodynamic characteristics are the result of radiosonde direct measurements (pressure, temperature, mixing ratio and wind) and derived variables such as geopotencial, potential temperature (and hydrostatic stability), equivalent potential temperature (and convective stability), saturation equivalent potential temperature (and conditional stability), relative humidity, zonal and meridional components of wind, and vertical wind shear.