PNSDs and trajectory history datasets (Khadir et al., 2023) doi-10-5281-zenodo-7907474-0 https://doi.org/10.5281/zenodo.7907474 Swedish National Data Service Svensk nationell datatjänst Landing page PNSDs and trajectory history datasets (Khadir et al., 2023) doi-10-5281-zenodo-7907474-0 https://doi.org/10.5281/zenodo.7907474 Khadir Théodore Swedish National Data Service Svensk nationell datatjänst Landing page Three datasets (for ATTO Tower, Hyytiälä and Zeppelin stations): Contain hourly Particle Number Size Distributions and air mass history (96 hours) calculated using Hysplit - Hybrid Single Particle Lagrangian Integrated Trajectory model. Precipitation rates along trajectories are collocated using TRMM for the Atto dataset, and other meteorological conditions are given from GDAS1 reanalysis (output from Hysplit). Access to data through an external actor. Data are freely accessible. Åtkomst till data via extern aktör. Data är fritt tillgängliga. openAccess