Abstract
In large urban centers, the major contributors to much of the degradation of air quality are motor vehicles on the road. In some cities, the levels of concentrations of air pollutants have reached levels that pose a risk to human health. Among the most important pollutants associated with these findings, we can highlight ozone (O 3 ) , as a secondary pollutant formed from photochemical reactions, of nitrogen oxides (NO x ). Numerous studies have found associations between daily levels of ozone (O 3 ) with a number of health effects. In the state of South Mato Grosso (MS), there has been a growing increase of ozone levels in the atmosphere in recent years. Considering the above, this study aimed to identify the best estimator for the Weibull distribution , in analyzing the ozone concentration , for the city of Campo Grande-MS. Hence, an electronic data from the continuous air monitoring station located on the campus of the Federal University of South Mato Grosso (UFMS), Campo Grande was utilized. According to the results presented by the tests, it was verified that the LSRM method presented the poorest performance. The EPFM, MOM and MSDM are most efficient methods to adjust the Weibull distribution curves for the evaluation of ozone concentrations the atmosphere.
Highlights
Ozone (O3) and nitrogen oxides (NOx) comprising of nitrogen dioxide (NO2) and nitric oxide (NO) are among the most important contaminants in urban areas as they have adverse effects on human health and the natural environment
Considering the above, this study aimed to identify the best estimator for the Weibull distribution, in analyzing the ozone concentration, for the city of Campo Grande-Mato Grosso (MS)
The mean value of the ozone concentration was higher than the median indicating that there was a high concentration recorded during the study period, the positive numbers indicate roughness effect that defines the occurrence of extreme events and the emissions of ozone gas
Summary
Ozone (O3) and nitrogen oxides (NOx) comprising of nitrogen dioxide (NO2) and nitric oxide (NO) are among the most important contaminants in urban areas as they have adverse effects on human health and the natural environment. The main source of NOx in urban areas is the exhaustion of motor vehicles. Even if the concentration of NOx has a downward trend, NO2 share in NOx emissions has increased in recent years and depends on vehicle type fuel technology, exhaust treatment technology and the driving conditions.[1]. In South Mato Grosso, measurement of ozone concentration at ground level began in 2004. The ozone concentration has shown an increasing trend in the state of South Mato Grosso since the first measurements took place in 2004, and this has been the main pollutant in many areas of the state.[2,3,4]
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