engleski

Fluctuations in physical, chemical and biological oceanographic conditions offshore Rovinj in the period 1972-2009

Long-term changes of temperature, salinity, geostrophic currents, chlorophyll a and nutrient concentrations in the eastern northern Adriatic coastal zone off Rovinj (up to 13 Nm) during the period 1972-2009 were analysed. Time intervals of different patterns and duration were identified. Alternatively the region was dominated by inflow of more saline southern waters or freshened waters from the area of the Po River delta. The last decade is marked by a strong increase in temperature and salinity, decrease of orthophosphate and chlorophyll a concentrations and inflow of southern more saline waters. Fluctuations of the investigated parameters values and circulation patterns were synergistically controlled by changes in air-sea fluxes, Po River discharges and large scale circulation patterns. However, changes in the last decade seem to be primarily driven by extreme reductions of the Po River discharge rate.

long-term changes; Po River; northern Adriatic

nije evidentirano