Measurements of aerosol size distribution between 14 and 661 nm diameter were measured using a TSI Scanning Mobility Particle Sizer (consisting of 3080 DMA, 3772 CPC and x-ray aerosol neutraliser, 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 Characterising Organics and Aerosol Loading over Australia (COALA-2020) campaign. Zero and flow checks logged have been removed from the published measurements, presented at 1-minute temporal resolution. 1-minute data are spline interpolations of the 5-minute scan measurements output by the instrument. Measurements span from January 29 2020 until March 15 2020. Please note that the instrument was run with leaky impactor until February 18 2020. Measurements in this period should be treated with caution. Measurements made during February 18-20 were disrupted due to impactor testing and have been removed. Following February 20, measurements were made without an impactor. Measurements were not made between February 25 and February 29.

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