Chemistry of Atmospheric Brown Carbon

Chemistry of atmospheric brown carbon.

Photochemical processing of aqueous atmospheric brown carbon

Atmospheric brown carbon (BrC) is a collective term for light absorbing organic compounds in the atmosphere. While the identification of BrC and its formation mechanisms is currently a central effort in the community, little is known about the atmospheric removal processes of aerosol BrC. As a result, we report on a series of laboratory studies of photochemical processing of BrC in the aqueous ...

Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event.

Lag Ba'Omer, a nationwide bonfire festival in Israel, was chosen as a case study to investigate the influence of a major biomass burning event on the light absorption properties of atmospheric brown carbon (BrC). The chemical composition and optical properties of BrC chromophores were investigated using a high performance liquid chromatography (HPLC) platform coupled to photo diode array (PDA) ...

Supplement of Photochemical processing of aqueous atmospheric brown carbon

Brown carbon: a significant atmospheric absorber of solar radiation?

Several recent observational studies have shown organic carbon aerosols to be a significant source of absorption of solar radiation. The absorbing part of organic aerosols is referred to as “brown” carbon (BrC). Using a global chemical transport model and a radiative transfer model, we estimate for the first time the enhanced absorption of solar radiation due to BrC in a global model. The simul...