| C3S |
Copernicus Climate Change Service |
| CATDS |
Centre Aval de Traitement des Données SMOS |
| CCI+SSS |
ESA Climate Change Initiative Sea Surface Salinity project |
| CDR |
Climate Data Record |
| ECMWF |
European Centre for Medium-Range Weather Forecasts |
| ENSO |
El Niño–Southern Oscillation |
| ESA |
European Space Agency |
| ICDR |
Interim Climate Data Record |
| MEI |
Multivariate ENSO Index |
| NRT |
Near-real time |
| pss |
Practical Salinity Scale |
| RONI |
Relative Oceanic Niño Index |
| SMAP |
Soil Moisture Active Passive |
| SMOS |
Soil Moisture and Ocean Salinity |
| SSS |
Sea Surface Salinity |
| SST |
Sea Surface Temperature |