Extended Data Fig. 1. Aerosol concentrations during blowing snow events and non-blowing snow periods.

a, The classification of periods, including blowing snow events with valid aerosol data (Blowing snow), non-blowing snow periods with valid aerosol data (Non-blowing snow), local primary pollution periods (Pollution)⁶⁰, and periods with missing aerosol data (No data), shown as blue, orange, black, and white bars, respectively. b-d, Boxplot plots of CCN number concentration at supersaturation of 0.27% (N_CCN,0.27%), particle number concentration in the size from 10 to 300 nm (N_10-300nm), and super-micron particle number concentration (N_>1000nm) during the blowing snow events (blue) and periods between two consecutive blowing snow events (orange). Center lines, box limits, and whiskers represent median values, 25^th to 75^th, and 10^th to 90^th percentiles, respectively. Triangles represent mean values. The sample size used to derive the boxplot is shown in Supplementary Table 1.