Articles | Volume 14, issue 1
Geosci. Model Dev., 14, 259–273, 2021
https://doi.org/10.5194/gmd-14-259-2021
Geosci. Model Dev., 14, 259–273, 2021
https://doi.org/10.5194/gmd-14-259-2021

Development and technical paper 15 Jan 2021

Development and technical paper | 15 Jan 2021

Optimization of the sulfate aerosol hygroscopicity parameter in WRF-Chem

Ah-Hyun Kim et al.

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Short summary
A new method to estimate the sulfate aerosol hygroscopicity parameter (κSO4) is suggested that can consider κSO4 for two different sulfate species instead of prescribing a single κSO4 value, as in most previous studies. The new method simulates more realistic cloud droplet concentrations and, thus, a more realistic cloud albedo effect than the original method. The new method is simple and readily applicable to modeling studies investigating sulfate aerosols’ effect in aerosol–cloud interactions.