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IIT Madras Links Elevated Aerosols to Thicker Winter Fog Using CALIPSO Data
IIT Madras research reports that elevated aerosol concentrations are associated with thicker winter fog and larger droplets near the fog top. The research uses 15 years of CALIPSO satellite data and identifies a vertical mechanism that lifts fog tops and delays fog dissipation.
IIT Madras Study: Elevated Aerosols and Winter Fog (Using CALIPSO Data)
| Dimension | Key Details |
|---|---|
| Authority | Research is reported by IIT Madras. |
| Data Source | Based on 15 years of CALIPSO satellite data. |
| Association Reported | Elevated aerosol concentrations are associated with thicker fog and larger droplets near the fog top. |
| Vertical Mechanism | Aerosols induce vertical mixing through latent heat release. |
| Fog-top Height | 400–600 m |
| Dissipation Effect | Fog dissipation is significantly delayed. |
| Feedback Loop | Aerosol thickening mechanism traps pollutants closer to the surface, creating a vicious cycle that severely worsens air quality. |
| Mitigation Lever | Reducing aerosol emissions is critical to mitigating socio-economic disruptions caused by persistent winter fog. |