Animation of the MultiMission Optimally Interpolated Sea Surface Salinity (OISSS) monthly level 4 global dataset based on the AQUARIUS/SACD, SMAP and SMOS level 2 mission data gridded on a 0.25 degree spatial grid with a monthly time scale. The dataset covers the period from September 2011 to present, and is produced by the Earth and Space Research (ESR), Seattle and International Pacific Research Center (IPRC), University of Hawaii at Manoa in collaboration with Remote Sensing Systems (RSS), Santa Rosa, California (https://doi.org/10.5067/SMP204UMCS).