Measuring light absorption by freshly emitted organic aerosols: optical artifacts in traditional solvent-extraction-based methods

Shetty, Nishit J.; Pandey, Apoorva; Baker, Stephen; Hao, Wei Min; Chakrabarty, Rajan K.

doi:https://doi.org/10.5194/acp-19-8817-2019

Articles | Volume 19, issue 13

Atmos. Chem. Phys., 19, 8817–8830, 2019

https://doi.org/10.5194/acp-19-8817-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Atmos. Chem. Phys., 19, 8817–8830, 2019

https://doi.org/10.5194/acp-19-8817-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 13

Research article

11 Jul 2019

Research article | 11 Jul 2019

Measuring light absorption by freshly emitted organic aerosols: optical artifacts in traditional solvent-extraction-based methods

Nishit J. Shetty et al.

Supplement

https://doi.org/10.5194/acp-19-8817-2019-supplement

Data sets

Data for "Measuring Light Absorption by Freshly Emitted Organic Aerosols: Optical Artifacts in Traditional Solvent Extraction-Based Methods" N. Shetty https://doi.org/10.17632/sdy3ptyrht.1

Short summary

We investigated biases in particle-phase absorption coefficients for organic aerosol from bulk-phase absorbance measurements of solvent extracts in the visible spectrum. These biases were systematically studied as a function of organic-to-total carbon mass ratios and aerosol single scattering albedo. A linear correlation between SSA and OC / TC ratios was observed. Differences in the absorption Ångström exponents from bulk- and particle-phase measurements were also investigated.