| IGAC | International Global Atmospheric Chemistry | 国际全球大气化学 |
| IGAC | Income-Generating Activities Committee | 创收活动委员会 |
| IGAC | Instituto GeogrÁfico AgustÍn Codazzi | Instituto GeogrÁfico AgustÍn Codazzi |
| IGAC | International Global Atmospheric Chemistry Program | 国际全球大气化学计划 |