Aerosol light absorption alleviates particulate pollution during wintertime haze events.

ABSTRACT: Aerosol light absorption has been widely considered as a contributing factor to the worsening of particulate pollution in large urban areas, primarily through its role in stabilizing the planetary boundary layer (PBL). Here, we report that absorption-dominated aerosol-radiation interaction can decrease near-surface fine particulate matter concentrations ([PM_2.5]) at a large-scale during wintertime haze events. A "warm bubble" effect by the significant heating rate of absorbing aerosols above the PBL top generates a secondary circulation, enhancing the upward motion (downward motion) and the convergence (divergence) in polluted (relatively clean) areas, with a net effect of lowering near-surface [PM_2.5]. Furthermore, aerosol absorption of ultraviolet-wave light effecti

SUBMITTER: Wu J 

PROVIDER: S-EPMC11725903 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature