Heterogeneous OH oxidation of secondary brown carbon aerosol

Schnitzler, Elijah G.; Abbatt, Jonathan P. D.

doi:https://doi.org/10.5194/acp-18-14539-2018

Articles | Volume 18, issue 19

Atmos. Chem. Phys., 18, 14539–14553, 2018

https://doi.org/10.5194/acp-18-14539-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Atmos. Chem. Phys., 18, 14539–14553, 2018

https://doi.org/10.5194/acp-18-14539-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 19

Research article 11 Oct 2018

Research article | 11 Oct 2018

Heterogeneous OH oxidation of secondary brown carbon aerosol

Elijah G. Schnitzler and Jonathan P. D. Abbatt

Supplement

https://doi.org/10.5194/acp-18-14539-2018-supplement

Data sets

Supplementary Data for Heterogeneous OH Oxidation of Secondary Brown Carbon Aerosol E. G. Schnitzler and J. P. D. Abbatt https://doi.org/10.5683/SP2/KGAVEO

Short summary

Brown carbon (BrC) has significant but poorly constrained effects on climate. In this work, we investigate the effects of the OH radical on optical properties of secondary BrC in a series of smog chamber experiments. At high relative humidity (RH), we find that the evolution of the particles is complex, exhibiting rapid absorption enhancement followed by slow bleaching. At low RH, bleaching does not occur. These results further our understanding of the highly variable evolution of ambient BrC.