摘要：In the study, chlorophyll-a concentrations were examined using field observations by Ocean seven 316 profiler over the Southern continental shelf of the Caspian Sea near Iranian coasts. The data were collected at nine stations with a maximum depth of 117 m depth along three transects in perpendicular to the Southern coasts of the Caspian Sea , off Rudsar in Summer 2008. Amounts of the chlorophyll-a varied from 3.8 to 0.1 mg m-3 with the maximal levels at 15 m depth. The formation and destruction of seasonal thermocline affect the chlorophyll-a concentrations. Chlorophyll-a concentration sharply decreased with depth and reached around 0.1 mg m-3 near bottom.
