| Name | Type | Country | Components |
|---|---|---|---|
| Kuopio Atmospheric Simulation Chambers (KASCs) | Atmospheric simulation chamber | Finland | 1 |
| Lampedusa | Observational platform | Italy | 2 |
| Lecce (ECO-CNR + UNISALENTO) | Observational platform | Italy | 3 |
| Leipzig Aerosol and Cloud Remote Observations System (LACROS) | Mobile platform | Germany | 2 |
| Lom | Observational platform | Czechia | 1 |
| Madrid | Observational platform | Spain | 2 |
| MAGA Mobile facility | Mobile platform | Italy | 2 |
| Marambio | Observational platform | Finland | 1 |
| MARTISLAB-BE | Mobile platform | Belgium | 1 |
| Melpitz Research Station | Observational platform | Germany | 4 |
