BEHAVIOR OF NITROGEN DIOXIDE ON THE NORTHEAST REGION OF BRAZIL AND ITS RELATIONSHIP WITH METEOROLOGICAL VARIABLES

Ano: 2018 | Volume: 40 | Número: Especial

Autores: Ismael Guidson Farias Freitas, José Carlos da Silva Alves, Ericka Voss Chagas Mariano, Glauber Lopes Mariano

Palavras-chave: atmospheric pollution, chemistry of the atmosphere, remote sensing, nitrogen dioxide, OMI.

Resumo Inglês:

The emission of pollutants has become one of the subjects most debated in the last years, due to the increase of fixed emitting sources like industries
and movable like the motor vehicles. In the Northeast of Brazil, the high concentrations of pollutants occur mainly in large urban centers, where one
of these pollutants is emitted nitrogen dioxide, which is a highly polluting gas. Once observed high concentrations of this pollutant in the atmosphere
can cause effects on human health and also influence the formation of acid rain. Thus the objective of this work was to investigate and quantify the
total column of nitrogen dioxide gas over the northeastern region of Brazil based on data from the OMI sensor (Ozone Monitoring Instrument)
between 2005 and 2015, through statistical techniques for analysis graphic and spatial. Significant variations of the pollutant were identified in the
study area, highlighting Salvador, Teresina and Fortaleza, where they showed significant correlation results with meteorological variables. The
results showed that Salvador had concentrations of up to 3.5 E+15 (1/m²) in the total NO2 column, while Teresina and Fortaleza had a maximum of
3.0 E+15 (1/m²) and 2,6 E+15 (1/m²), respectively. Therefore, the variations were different in the cities.