Vanadium concentrations and isotope compositions of seawater samples collected from the South Atlantic Ocean (2010 UK GEOTRACES cruise GA10/D357 Leg 1) and the Black Sea (2013 MedBlack GEOTRACES cruise leg 2, 64PE373, R/V Pelagia)

These data include vanadium concentrations and isotope compositions of seawater samples from the South Atlantic Ocean (collected during the UK GEOTRACES cruise GA10/D357 Leg 1) and the shallow water columns in the Black Sea (collected during the leg 2 of the MedBlack GEOTRACES cruises, 64PE373, R/V Pelagia). The resin column chromatography method is utilized to purify vanadium. The vanadium concentrations were measured with the Agilent 7500ce Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Thermo Element 2 ICP‑MS, and the isotope compositions were measured with the Neptune Multi-collector-ICP-MS. These data assess the cycling of vanadium isotopes in seawater and were collected by Dr. Siqi Li at Florida State University.