Chlorophyll a, Total Suspended Matter and Secchi Depth - DOORS 2 cruise, leg 1, September 2023

The  datasest contains Chlorophyll a, Total Suspended Matter and Secchi depth data collected during  R/V Mare Nigrum cruise #2 , leg 1 from 23 stations,  located in the Romanian Black Sea area, 1-10 September, 2023 in the framework H2020 DOORS Project.  Subsurface water samples (at approximately 1 m depth) were collected at each station using the Niskin bottles in a rosette of the CTD system of the vessel at each station. At stations where the CTD system was not deployed due to the bad weather conditions, a sample bottle was used to collect the water samples. For some stations, additional  water samples were collected at the depth where Chl-a maximum appears and the bottom. These discrete water were conditioned for successive laboratory analysis of:         Chlorophyll a  concentrations determined spectrophotometrically according to Jeffrey and Humphrey, 1975          Total Suspended Matter  through dry-weighting  according to J. Strickland and T. Parsons, 1972