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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2018-51
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Technical note
22 Jan 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Technical note: Updated parameterization of the reactive uptake of glyoxal and methylglyoxal by atmospheric aerosols and cloud droplets
Leah A. Curry, William G. Tsui, and V. Faye McNeill Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
Abstract. We present updated recommendations for the reactive uptake coefficients for glyoxal and methylglyoxal uptake to aqueous aerosol particles and cloud droplets. The particle and droplet types considered were based on definitions in GEOS-Chem v11, but the approach is general. Liquid maritime and continental cloud droplets were considered. Aerosol types include sea salt (fine and coarse) with varying relative humidity and particle size, and sulfate/nitrate/ammonium as a function of relative humidity, particle composition, and aerosol pH. We take into account salting effects, aerosol thermodynamics, mass transfer, and aqueous phase chemical kinetics. The new recommended values for the reactive uptake coefficients in most cases are lower than those currently used in large-scale models, such as GEOS-Chem. We expect application of these parameterizations will result in improved representation of aqueous secondary organic aerosol formation in atmospheric chemistry models.

Citation: Curry, L. A., Tsui, W. G., and McNeill, V. F.: Technical note: Updated parameterization of the reactive uptake of glyoxal and methylglyoxal by atmospheric aerosols and cloud droplets, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-51, in review, 2018.
Leah A. Curry et al.
Leah A. Curry et al.
Leah A. Curry et al.

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We have developed a new parameterization of the reactive uptake of glyoxal and methylglyoxal by atmospheric aerosols and cloud droplets. Our calculations take into account newly available information regarding the gas-particle partitioning of these species and their chemical processing in the aerosol phase. We expect application of these parameterizations will result in improved representation of aqueous secondary organic aerosol formation in atmospheric chemistry models.
We have developed a new parameterization of the reactive uptake of glyoxal and methylglyoxal by...
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