Os efeitos do desflorestamento no clima da Bacia Amazônica.

Abstract

The main objective of this study was to evaluate the impacts of deforestation at different scales on the climate of the Amazon basin. For that, numerical experiments were carried out from three different scenarios: a) Scenario without deforested areas (FLOR), b) Scenario of partial deforestation (DF50) and c) Scenario with total deforestation (DFTOT) of the Amazon basin. The experiments were conducted from the ETA regional model, forced with initial and boundary conditions from the HadGEM2-ES global model, via dynamic downscaling technique. In Chapter 1, the results for partial deforestation show a -0.10 mm/day decrease in precipitation and a 1.27 °C increase in surface temperature during the rainy season. For the total deforestation scenario, precipitation anomalies indicate a reduction of -0.35 mm/day and an increase of 4.02 °C in air temperature. Changes in radiation, energy, circulation balances and an increase in convective potential for the Amazon basin region were also observed. It is important to highlight that the intensity of the anomalies of the variables depends on the season of the year and the spatial scale of the considered deforestation.