Molecular-level Changes in Atmospheric Dissolved Organic Matter During Snowfall in A Heavy-industrial City of Northeastern China

This dataset contains molecular-level mass spectrometric data of dissolved organic matter (DOM) in total suspended particles (TSP) collected before, during, and after a snowfall event in a heavy-industrial city in northeastern China. It includes assigned molecular formulas, m/z values, and relative abundances, and supports the analysis of snowfall-driven scavenging and post-snowfall molecular changes in atmospheric DOM.