Аннотация:In this study, we investigate sensitivity of total surface water transformationto salinity from different data sources. Here we use surface salinity from NCEP CFSv2reanalysis, GLORYS ocean reanalysis, Aquarius satellite data and ISAS-15 (product ofoptimal interpolation of ARGO buoys) as well as heat and freshwater fluxes from NCEPCFSv2 reanalysis. The largest spread in estimates of salinity is observed for Aquariussatellite in subpolar regions. The best correspondence between transformationcomputed using salinity from different datasets is observed for subtropical waters.Model-based products (CFSv2 and GLORYS) are the most consistent in estimates ofsurface water transformation and the largest discrepancies between these datasets areobserved in the regions with high freshwater fluxes.