Estudo das circulações de mesoescala sobre a Paraíba.

Abstract

A study on the mesoscale circulation systems on Paraíba is presented using three different approaches. The first, based on a numerical model of the existing boundary layer circulation, developed by Gomes FHho (1979) to simulate the effects of topography and albedo on the circulation in the Northeast, was made a refinement of the grid of points to simulate the atmospheric circulation over Paraíba. The second approach uses a regional circulation model (RAMS) developed at the University of Colorado - USA, taking as its central point the city of Taperoá (7.0 ° S: 36.5 ° W) in Paraíba, with the grid of points extending 300 Km to both East and West. In the third approach were surface wind observational data for five years from 1977 to 1981, with hourly values. In all three cases, a common feature appears whenever and the intensification of low-level winds over the Borborema Plateau. In the cases RAMS, the well-defined daily breeze circulation In addition, in the upward / downward motion system that suggests waves stationary due to the interaction of the breeze with the terrain topography and wind is represented. Another important feature shown in these three approaches is the indication of a convergence zone with upward movements in the area of meeting of the three states of Ceara, Paraíba and Pernambuco, coincidentally a Very convection area.