| Abbreviation | Definition |
|---|---|
| AICC | Arctic Icebreaker Coordinating Committee |
| AICP | Arctic Icy Cape Preservation |
| AICSM | Aberdeen Institute for Coastal Science and Management |
| AID | Agency for International Development |
| AIDJEX | Arctic Ice Dynamics Joint Experiment |
| AIMS | Australian Institute of Marine Science |
| AIRMON | Atmospheric Integrated Research Monitoring Network |
| AISC | Assessment and Information Services Center |
| AIV | Aviation Impact Variable |
| AL | Aeronomy Laboratory |
| ALACE | Autonomous Lagrangian Circulation Explorer |
| ALFS | Alaska Landscape Flux Study |
| ALSP | Atmosphere and Land Surface Processes |
| AMC | Atlantic Marine Center |
| AMEA | Asia Marine Educators Association |
| AMERIEZ | Antarctic Marine Ecosystem Research at the Ice- Edge Zone |
| AMIP | Atmospheric Model Intercomparison Project |
| AMISC | Australian Marine Industries and Sciences Council |
| AMMA | African Monsoon Multidisciplinary Analysis |
| AMO | Atlantic Multi-decadal Oscillation |