p. 7 - 51 LONG TERM STATISTICAL CHARACTERISTIC OF SEVERAL PHYSICO-CHEMICAL PARAMETRES OF THE NEARSHORE WATERS IN THE CONSTANTZA ZONE Adriana Popa, Adriana Cociasu, Lucia Popa, Iulia Voinescu, Liliana Dorogan Institut Roumain de Recherches Marines Constanta Abstract The paper presents the usual statistical parameters and the frequency distribution computed for the chronological data series of the sea water temperature and salinity, and the oxygen, organic substance, nitrate, silicate, and phosphate contents measured daily at the Constantza shore station during 1959-1983. The quarterly, seasonal and semestrial selections for the entire period as well as for partial succesive periods have been analysed.