Hourly Atmospheric Potential Gradient Data from São Paulo (SPA) station - CRAAM (2018–2024)

Hourly atmospheric potential gradient (PG) measurements from São Paulo (SPA) station, Brazil, covering the period February 2018 to December 2024. The dataset contains hourly PG observations under all atmospheric conditions. Fair-weather classification applied in the associated study is part of the analysis methodology and is not included in this dataset. Dataset used in the paper "Regime-dependent sensitivity of the atmospheric potential gradient to anthropogenic air pollution in São Paulo, Brazil". Atmospheric Research (2026)