Utjecaj Zmorca Na Onečišćenost Zraka Na Splitskom Području

Abstract

The paper investigates the impact of sea breeze on the NO2, SO2, PM2.5 and
 PM10 concentrations in Split area towards the Split-centre and Kaštel Sućurac
 measurement stations. The study included the days when the coastal circulation
 was undisturbed. In all isolated days, the mean sea level pressure field was with
 low gradients. In particular, the frequency and wind speed on selected days have
 been explored. The sea breeze in Split has SW direction, and in Kaštel Sućurac
 WSW and W direction. The concentrations of pollutants are compared to wind
 speeds. The most polluting substance is NO2, most of it is in the evening and in
 the morning when the sea breeze has not yet developed the speed or its speed
 decreases by approaching the evening’s sea breeze lull. As the sea breeze speed
 increases, the concentration of NO2 decreases. As the sea breeze occurs, the concentration
 of floating particles increases due to wind turbulence within the city,
 and the possible release of sea aerosols and by-products of sea traffic. NO2 reaches
 higher values in Split than in Kaštel Sućurac. Floating particles are more present
 in Kaštel Sućurac than in Split. The values of all pollutants are below the limit
 values for human health.