View ECCC Data Mart (English) (English, HTML)

View ECCC Data Mart (English): English HTML file. From Environment and Climate Change Canada, updated Sep 2026. View metadata, licence and the direct download on CanQuery.

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2026-09-29

Environment and Climate Change Canada (ECCC) developed the ADAGIO (Atmospheric Deposition Analysis Generated by Interpolation of model and Observations) product, which provides maps of optimized wet, dry and total annual deposition of nitrogen, sulphur, and ozone in Canada and the United States by combining observed and modelled data. Ground-based measurements provide the most accurate data near measurement sites, but cannot provide reliable large-scale estimates of deposition where sites are sparse. Chemical transport models provide improved spatial coverage, but often have biases and uncertainties related to model parameterization. In the ADAGIO product, observational data are collected from precipitation chemistry and air monitoring networks comprising a few hundred stations across North America. Modelling data are obtained from ECCC’s GEM-MACH (Global Environmental Multiscale - Modeling Air Quality and CHemistry) model. If available, model versions that include wildfire emissions are used. The model and observational data are statistically combined using the Optimal Interpolation technique (Robichaud et al., 2025, 2026). ADAGIO provides continuous total deposition fluxes…

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