Figure and plotting data for GRL manuscript 2026GL126194

This record contains the processed observational data and plotting data underlying the main-text and supporting figures of the manuscript “Vertical Timing Reveals Aloft-to-Ground Coupling of New Particle Formation in a Polluted Urban Atmosphere” submitted to Geophysical Research Letters (Manuscript 2026GL126194). The files include the data used to generate Figures 1–4 and the supporting figures. This record is provided for peer-review purposes.