p. 33 - 46 CHARACTERISTIQUES DU CHIMISME DES EAUX MARINES DU LITTORAL ROUMAIN EN CONDITIONS DE DOMINATION DES VENTS DU SECTEUR NORD Lucia Popa, Adriana Popa et Liliana Dorogan Institut Roumain de Recherches Marines Constanta Abstract The paper presents the quantitative modifications occuring in the chemical structure of the Romanian nearshore waters in the zone bounded by the 44 grade 10'N and 44 grade 40'N latitudes under the effect of the prevailing northerly winds. During the warm season the significant salinity decreases produced by this type of circulation are favourable to the mass development of several planctonik species, leading to unsual increase in the disolved oxygen and organic matter content.