Experimento exploratório de semeadura artificial em nuvens cúmulus quentes no interior do Estado do Ceará

Abstract

ln _this work an exploratory experiment in warm cumulus seeded clouds with salt solution is described. This experiment was performed at Nova Russas city, in the Ibiapaba Meridional region of the Ceará State. A set of ten warm and non-precipitating cumulus clouds were studied. Three of those were seeded by NaCI salt solution. The main objective was to study the evolution of the microphysic parameters (in particular, the mean diameter and liquid water content), as well as the correlations between these parameters, as a function of the height to cloud base, for natural and seeded clouds. FUNCEME supported the measurements, which were done with the instrumented aircraft ALFA Mean diameter and liquid water content (LWC) data were analyzed and compared to each other. It were observed an increased mean diameter and liquid water content for seeded clouds in comparison to natural ones. It is suggested that the increased mean diameter and L WC for seeded clouds is due the collision-coalescence instead entrainment phenomenon.