Aquecimento global e possível expansão volumétrica das águas do oceano Atlântico na costa Nordeste do Brasil.

Abstract

The main goal of this work is to analyze the effect of the Global Warming over the Earth in a part of the water mass of the South Atlantic Ocean called South Atlantic Central Water (SACW). This analysis done through a volume of control , having the coordinates 5° to 14° S and 30º to 35º W, from the surface up to 500 meter depth. As reports the IPCC, the Earth will experiences variation in the air temperature from 1 up to 6 ºC in the next one hundred years. They found interesting to study what impacts this process would cause to this mass of water in terms of Volumetric Expansion. In such a way, they have used Temperature and Salinity data (for characterization of the water) in a period of 39 years, available from REVEZEE Program (Recursos Vivos da Zona Econômica Exclusiva) in a Report launched in the year of 1996. As well as of referring data to the mean sea level, for five cities (João Pessoa, Natal, Recife, Maceió and Aracaju), located in the region studied, and divulged by the Direction of Hydrography and Navigation of the Brazilian Navy (DHN), in its Website. The results show a fast volumetric expansion of the analyzed water mass in each season of the year (Spring, Summer, Autumn and Winter), in function of the variation of temperature (from 1 up to 6 ºC) appointed in the IPCC Report. From percentages of expansion reaches a minimum of 4.8% and a maximum of 29%. From this results, João Pessoa respond with bigger level of expansion in all the seasons, followed by Natal and Recife. Maceió and Aracaju also suffer considerable rises.