Concentrations of total mercury and total methylated mercury in the northern Barents Sea as part of the Nansen Legacy project, Cruise 2021704

This dataset includes concentrations of total mercury (THg) and total methylated mercury (MeHg) in seawater and under ice water. Samples were collected in April/May as part of cruise 2021704, Q2, in the northern Barents Sea as part of the Nansen Legacy project. Concentrations were measured at seven different stations using GOFLO bottles attached sequentially and sampled using trace metal clean techniques. THg and MeHg samples were collected unfiltered. Additional samples deeper than 500m were collected at stations P6 and P7 using Niskin bottles attached to a rosette. THg was measured by cold vapor atomic fluorescence spectrometry (CVAFS). MeHg was measured by species-specific isotope dilution gas chromatography sector field inductively coupled plasma mass spectrometry (ID-GC-SF-ICP-MS) with a quantitation limit (LOQ) of 7 fmol L-1.