Directions of air pollution inflows as a method for evaluation of representativeness of automatic air monitoring stations area

Abstract

The use of averaged directional air pollution inflows has been investigated for the area representativeness evaluation of automatic air monitoring stations. Two-year data from chosen monitoring stations were used. The one-hour values of SO 2 , NO, NO 2 , CO, and PM10 concentrations were ordered with respect to their inflow direction, by dividing them into 36 sectors of 10º range and calculating their arithmetic mean. For the obtained values, the dispersion analysis was carried out. It was concluded that the averaged concentration dispersion of pollutants in the direction sectors can be used as one of the criteria for the automatic air monitoring stations area representativeness evaluation. The changeability coefficients can be used as a measure of the dispersion. They are dimensionless quantities, often expressed as percentages.