Análise de variáveis meteorológicas influenciadas pelo espaço urbano de João Pessoa.

Abstract

The present study aimed to contribute to a better understanding of surface process related to ventilation and precipitation in an urbanized region through the use of numerical modeling. The study area is within the Metropolitan Area of João Pessoa (MAJP), which provides a unique environment for research in urban climate due to its asymmetric profile quoted from the ocean to its interior. The representation of radiative processes on the MAJP’s surface was possible through the TEB scheme coupled to BRAMS. Therefore, the use of images from satellite sensors allowed the trimming of the geographical area of study, as well as the drafting of the default configuration of the file of occupation which contained three different kinds of surfaces named “Urban 1”, “Urban 2” and “Not Urban”. Two experiments were performed using the model, namely TEB (with TEB scheme activated) and STEB (without TEB scheme activated). The surface downward and upward radiative fluxes were analyzed as well as surface temperature, relative humidity rates, mix ratio and precipitation. It was observed the influence of the urban surface to all the abovementioned meteorological variables. The most densely populated regions of RMJP showed greater contrasts between experiments while the "Mata do Buraquinho" urban forest helped to reduce the influence of the urbanized region in the model.