Articles | Volume 14, issue 1
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, Seong Soo Yum, Dong Yeong Chang, and Minsu Park

Model code and software

Optimized sulfate aerosol hygroscopicity parameter code A.-H. Kim

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.