| Abbreviation | Definition |
|---|---|
| SCO | Seasonal Climate Outlook |
| SCOS | Southern California Ozone Study |
| SCRF | Stanford Center for Reservoir Forecasting |
| SCRIM | The Network for Sustainable Climate Risk Management |
| SCT | Scattered Clouds |
| SD | Single Droplet |
| SD | Specific Duty |
| SDHS | Satellite Data Handling System |
| SDL | Seven Day Lie |
| SEAM | Spectral Element Atmosphere Model |
| SEAM | Spectral Element Atmospheric Model |
| SEC | Space Environmental Center |
| SECA | Sulfur Emission Control Area |
| SEE | Static Exchange Evaluation |
| SELDADS | Space Environmental Laboratory Data Acquisition and Display System |
| SELS | SEvere Local Storms Unit |
| SEQ | Sequence |
| SERCAA | Support of Environmental Requirements Cloud Analysis and Archive |
| SET | Storm Education Team |
| SETT | Space Environmental Technology Transition |