The knowledge about how the globe is suffering from continuous atmospheric degradation is what motivates this study which is focused on air pollution in port-cites. The results obtained may allow administrations or citizens to support decisions. Besides, obtained results showed that wind speed and wind direction are the most important variables in the distribution of particles. On the other hand, a calculation of relative risks was developed showing that relative humidity, wind speed and wind direction produce an increase in the risk of higher pollutant concentrations.
By means of trends analysis, groups of equivalent stations were determined, implying that the values of one station could be substituted for those in the equivalent station in case of failure (e.g., SO 2 weekly trends in Algeciras and Los Barrios show equivalence). One of the goals of this work is to develop a useful virtual sensor capable of achieving a more robust monitoring network, which can be used, for instance, in the case of missing data. The analysis shows patterns that coincide with human activity. The higher average concentration values were obtained in Algeciras for NO 2 (28.850 µg/m 3) and SO 2 (11.966 µg/m 3), and in La Línea for PM 10 (30.745 µg/m 3). The analysis was developed in two monitoring stations (Algeciras and La Línea). The concentration parameters contain nitrogen dioxide (NO 2), sulphur dioxide (SO 2) and particulate matter (PM 10). A large database of air pollutant concentrations and weather measurements were collected using a monitoring network installed throughout the region from the period of 2010–2015. The aim of this work is to accomplish an in-depth analysis of the air pollution in the two main cities of the Bay of Algeciras (Spain).
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