Carbon monoxide trend in the city of Rio de Janeiro via mann-kendall and cusum tests

Abstract

(2011) for positive values (Z > 0) and p-value > 0.05. CUSUM test showed that Q magnitude did not exceed the critical value at 1% and 5% probability levels. Cumulative Sum Test (CUSUM) showed homogeneous and significant CO concentrations. Significant abrupt changes occurred in the months of May, June, July, August and September and insignificant in January, February, June, August and November at 1% and 5% probability. CO concentrations occurred in the predominant directions North-Northwest (NNW), South-Southwest (SSW) and South-west (SW). Both sectors are influenced by the main synoptic systems (Frontal System and South Atlantic Subtropical High) that act on CRJ. MK and CUSUM tests proved to be efficient in evaluating trends and abrupt changes in CO concentrations and air quality stations in the CRJ.

Regime de Vento na Serra do Mar - Rio de Janeiro, Brasil

“…A qualidade do ar depende não somente da quantidade de poluentes emitidos, mas também da capacidade da atmosfera de dispersar esses poluentes (Zimermann;Moraes, 2009;Zeri et al, 2011). Portanto, o regime de ventos juntamente com atuação dos sistemas meteorológicos e a topografia são determinantes na diluição dos poluentes (Lyra et al, 2011;Gois et al, 2017), principalmente no município de Duque de Caxias, na Baixada Fluminense (BF), onde se encontra a Refinaria Duque de Caxias (REDUC) que é responsável por 80% da produção de lubrificantes e pelo maior processamento de gás natural do Brasil.…”