A dinâmica atmosférica na vertente oriental da bacia do alto rio paraná e a gênese das chuvas

Abstract

The rhythm and intensity of atmospheric systems vary in time and space. Therefore, it is necessary to study the dynamics of air masses over a temporal series in order to characterize the climate dynamics of a region or area. The participation of the active atmospheric systems and the percentage shared by convective and frontal rains along the eastern slope of upper Paraná River were studied based on the dynamics of air masses. It was observed that, in such a slope, during the coldest months, the actions of the Atlantic tropical mass and polar Atlantic mass prevail. However, during the warmer months, in addition to the predominance of the action of equatorial continental and tropical continental low atmospheric pressure systems, convective rains also take place. It was also noted that, from the 1990s onward, a progressive increase was observed in the participation of convective rains, strengthening the theory of climatic change.