Global Ocean Salinity Measurements Have Some Serious Issues after 2015

Abstract Ocean salinity is essential for understanding changes in the climate system. Various gridded ocean salinity products, which are largely based on Argo measurements since the 2000s, have been created and used for climate-related studies. However, after 2015 a significant and unrealistic global salinification trend appears in most of the widely used global salinity products and disagreements between those products increase, both of which should be a concern for the climate community.