The main objective of this study is to simulate the daily change of the particulate matter (PM10) concentrations using a multiple linear regression (MLR) model for the selected sea breeze cases in Split and Kaštel-Sućurac, which are situated in the central part of the Eastern Adriatic coast, for the period from 2007 to 2009. A new predictor characteristic to the daily and nightly part of the coastal circulation is included in the MLR model. The MLR model results well match the PM10 concentration measurements during the selected sea breeze cases in Split (with the correlation coefficient R2=0.77 and the index of the agreement IA = 0.89) and Kaštel-Sućurac (R2=0.65, IA =0.81), and they also match the measurements during land breeze (for Split R2=0.66, IA=0.86 and for Kaštel-Sućurac R2=0.66, IA=0.70).

No abstract

The main goal of this paper is to study pollution during sea breeze days in the Split town center, which is placed near the industrial area with three cement plants and one asbestos cement plant, as well as a harbor with high traffic, and investigate the sources of pollution with SO2 and its relation to atmospheric parameters using stepwise multiple linear regression (MLR). The hourly temperature difference from the time of the sea breeze lull (dT) was considered in evaluating the influence of meteorological parameters on hourly pollutant concentrations. It was found that the wind direction index (WDI) is a significant predictor for the sea breeze, and wind speed, relative humidity, and dT are significant for the land breeze. A very high index of agreement of 0.9 was obtained by the MLR model for the land breeze, and 0.8 for the sea breeze. Low SO2 concentrations are observed at night, and increased values are found between 0800 and 1800 UTC. With WDI being the only predictor during sea breeze, local traffic is found to be the main anthropogenic source of SO2 pollution.

No 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.