Fertilization timing as a meteorology-amplified risk window for compound ozone and particulate pollution in the North China Plain

This archive contains processed city-day panels, extracted particulate nitrate values, figure source data, model-output summaries, analysis scripts, manuscript reference files, and documentation supporting the manuscript "Fertilization timing as a meteorology-amplified risk window for compound ozone and particulate pollution in the North China Plain", prepared for Atmospheric Chemistry and Physics. The archive supports manuscript-level verification of all reported figures, tables, and headline statistics. It does not redistribute bulky or provider-controlled raw third-party products such as raw satellite files, ERA5 fields, emissions inventories, or chemical-transport-model staging inputs. Sources, access URLs, product coverage, spatial/temporal subsets, and processing records for those third-party products are documented in the included data catalogs and documentation files.