engleski

Numerical analysis of sea quality in the northern Adriatic area

This study presents the results of a numerical analysis of sea quality in the northern Adriatic area over the course of the period 1997-2001. Boundary conditions on the open border of the model and freshwater confluences were repeated cyclically for fields of temperature and sea salinity in every analysed year. At the interface of the sea and atmosphere in the fields of air temperature, relative humidity, cloud cover and solar radiation cyclically repeated values were also used. The only variable field in the conducted simulations is the field of wind speed which in the period analysed was defined on the basis of results of the numerical atmospheric model Aladin-HR. Through the conducted research results were obtained which point to the importance of wind dynamics as stochastic parameters over which man does not have a direct influence and in the intensity of the dynamic of chlorophyll-a in the northern Adriatic area. The obtained results demonstrated that the highest concentrations of chlorophyll-a appeared during June and October, and in June 2000 and 2001 increased values were recorded in relation to the remaining years of the analysed period. The reason for this phenomenon is probably the longer retention of nutrient-rich water from freshwater confluences, primarily the river Po, in the surface layer of the sea north of Istria. The results of the numerical analysis concur with results from an assembly of projects carried out with the aim of defining the causes of frequent forming of mucilaginous aggregates in the northern Adriatic in the course of the period 1997-2001. (Project MAT - Monitoring and study of processes of mucilage formation in the Adriatic and Tyrrhenian Seas, 1999-2002).

clorofill-a ; Adriatic sea ; numerical model

nije evidentirano