Water temperature, salinity, nutrients, radium isotopes, and other parameters taken by CTD from the research vessel Onnuri in the Yellow and East China Seas from 2017-02-07 to 2017-02-14 (NCEI Accession 0200368)

Seawater samples were obtained using 10-liter Niskin bottles mounted on a Rosette frame fitted with a CTD. Hydrophysical data were measured using SBE 911-plus CTD.

Nutrient samples were vacuum-filtered using 0.7-μm Whatman GF/F filters and kept frozen until analysis. Dissolved inorganic nitrogen (DIN = NO3- + NO2- + NH4+) and phosphorus (DIP = PO43-) concentrations were measured using an auto nutrient analyzer (New QuAAtro39, SEAL Analytical). 228Ra was measured using a high-purity Germanium well-type detector. Data are in CSV format.