Measurements of condensation nuclei greater than 3 nm diameter (CN3) were collected using an ultrafine condensation particle counter (TSI Ultrafine Condensation Particle Counter 3776, TSI Incorporated, Shoreview, MN, USA). Measurements were taken at Cataract Scout Park, Appin, N.S.W. (34°14'42.29"S 150°49'24.97"E) from an inlet 5.13 m above ground level as part of the Characterizing Organics and Aerosol Loading over Australia (COALA-2020) campaign. The instrument was operated a using a sample flow rate of 300mL/min until 2020-02-18 23:30 UTC. Following this date, a sample flow rate of 1500mL/min was used to ensure consistency between comparable campaign measurements. No effect on measurements was evident. Logged zero and flow checks have been removed from the published measurements, presented are 1-minute temporal resolution means and standard deviations of native 1-second measurements output by the instrument.

Empty cells = ndCOALA-2020 was funded by Australia's National Environmental Science Program through the Clean Air and Urban Landscapes hub