Sampling: #Subsurface seawater samples were collected with a MITESS sampler (Bell et al., 2002) that was deployed on the kevlar cable of the Maria S. Merian. Sample treatment at sea: Samples were filtered through a 0.2 µm polycarbonate filter build-in a Teflon filtration rack. After filtration the samples were acidified with HNO3 (700 µl into 550 ml SW), below pH 2. All work was performed under clean air conditions in a clean hood. Measurement: Trace metal concentrations were measured by GF-AAS and a method adopted from Grasshoff et al. (1999). Quality Flag: WOCE converted to internal format, see hdl:10013/epic.31518.d001.