Water column chemistry in the southern Romanian EEZ 2023-2024 (H2020 BRIDGE-BS project)

Dataset contains hydrochemistry data collected along the Mangalia - East transect, in the Romanian southern EEZ (bottom depths between 15 and 1160 m), within the period February 2023 - July 2024. Data were collected during three BRIDGE -BS cruises carried out onboard R/V Mare Nigrum in February 2023 (cruise MN238), June 2023 (cruise MN242), and July 2024 (cruise MN260). In situ measurements of physical-chemical seawater parameters were done at each sampling station using SBE 25 CTD. Seawater samples were collected with 5L Niskin bottles from different depths, according to the CTD vertical profiles, and further analyzed in the GeoEcoMar lab for nutrients (by spectrometry), chlorophylls (by spectrometry), total mercury, and PAHs (by UPLC), the latter two only for July 2024 cruise. OCPs (by GC-ECD), PCBs (GC-ECD), and PAHs (by GC-MS) were analyzed in the NIMRD lab for the 2023 cruises. In addition, size-fractioned chlorophyll was analyzed by spectrometry for the June 2023 cruise in the NIMRD lab.