ChinaHighO3: OMI/Aura 25 km Ground-level O3 Dataset for China (Closed)

ChinaHighO₃ is one of the series of long-term, full-coverage, high-resolution, and high-quality datasets of ground-level air pollutants for China (i.e., ChinaHighAirPollutants, CHAP). It is generated from the big data (e.g., ground-based measurements, satellite remote sensing products, atmospheric reanalysis, and model simulations) using artificial intelligence by considering the spatiotemporal heterogeneity of air pollution. This is the OMI/Aura-derived yearly 25 km ground-level O₃ products in China from 2005 to 2019, and this dataset yields a high quality with a cross-validation coefficient of determination (CV-R²) of 0.84 and a root-mean-square error (RMSE) of 20.11 µg m^-3 on a daily basis. <strong>Note that this dataset is closed access since a longer-term, seamless, high-resolution (10 km), and higher quality ChinaHighO₃ dataset is available at: https://doi.org/10.5281/zenodo.4400042</strong> <strong>More CHAP datasets of different air pollutants can be found at: https://weijing-rs.github.io/product.html</strong>