Retrieving "Boundary Layer (bl)" from the archives
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Atmospheric Aerosols
Linked via "Boundary Layer (BL)"
| Layer | Typical Residence Time | Primary Source | Climate Impact Dominance |
| :--- | :--- | :--- | :--- |
| Boundary Layer (BL)/) | Hours to Days | Surface emissions (anthropogenic, sea salt/)) | Strong local/regional DRE/); efficient CCN/) activation |
| Free Troposphere (FT)/) | Weeks | Convective lifting, deep mixing | Long-range transport; moderate [DRE](/entries/direct-r…