Influência da variação sazonal da concentração de black carbon na emissividade atmosférica do Pantanal mato-grossense

Abstract

The expansion of agribusiness and the change in land use for grain planting, in the Pantanal Mato-Grossense, brought as consequences the increase in deforestation and fires, which in turn are responsible for the emission of anthropic aerosols such as Black Carbon. This aerosol has a significant impact on the global and regional climate, altering the radiation balance of the Earth-atmosphere system. However, the quantification of its effects is still subject to great uncertainties. In the present study, we sought to analyze the influence of the seasonal variation of the Black Carbon concentration on the atmospheric emissivity of the Pantanal Mato-Grossense. For this, the variations of Black Carbon concentrations and meteorological variables were calculated, and the atmospheric emissivity was estimated using the Brutsaert equation. It was found that variations in Black Carbon concentrations and atmospheric emissivity exhibit patterns of contrary behavior. The results indicate that the increase in the concentration of Black Carbon in the Pantanal atmosphere during the dry period decreases the water vapor content, and this can cause a decrease in atmospheric emissivity.