Data Set for Hygroscopicity of Isoprene-Derived Secondary Organic Aerosol Mixture Proxies: Importance of Solute Diffusion and Salting-In Effects

Surface tension measurements were obtained using a pendant drop tensiometer over a length of 300 seconds, using the methodology of Fertil et al., 2025 CCN measurements were obtained using a DMT Cloud Condensation Nuclei Counter using the Scanning Mobility CCN Analysis (SMCA) method (Moore et al., 2010). Data obtained was then analyzed using the PyCAT analysis toolkit available for public use (last access: August 27, 2025; https://doi.org/10.5281/zenodo.6329787; Gohil, 2022; Gohil and Asa-Awuku 2022)