THE INFLUENCE OF SEA BREEZE ON THE AIR POLLUTION IN THE SPLIT AREA
DOI:
https://doi.org/10.15291/geoadria.1498Keywords:
sea breeze, coastal air circulation, air pollution, floating particleAbstract
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.References
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