Correlation of precipitable water vapour values over the united states with physical and chemical parameters. Part III: Annual and seasonal trends,a further approximation

Summary Deviations from a law previously established, which correlates the precipitable water vapour values in a vertical column of air over a measuring station with the latter's temperature and altitude, are reduced by multiple regression analysis, and implications are discussed.Contribution of the «Centro Nucleazione Aerosoli» of the National Research Council of Italy, Via Vettore 4 (Monte Sacro)Roma.