Validação de estimativas da água precipitável mediante dados de radiossondagens.

Abstract

This study aims to compare means and daily values of precipitable water calculated in empirical form to cities of South America, and dividing it by regions, with calculated values of precipitable water in aerologic method, from values to weather variables obtained from radiossondagens. Were used 15 days of data radiossondagens during the month of June 2008. For empirical analysis we used three methods to calculate the precipitable water, these are the method of Allen, the method Won and the method of Hann. The values obtained by three methods were compared with the aerological method of Harrison, which is considered more accurate than the empirical methods. In general, for values calculated empirically which showed better correlation with the method of Harrison was the method of Hann, while for the daily values, the empirical method that showed the best correlation was the method of Allen.