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Hourly, 15-day backward air mass trajectories were simulated for 1995 using the FLEXPART Lagrangian particle dispersion model driven by ERA5 reanalysis data. This dataset provides source-receptor relationships at a 1° x 1° spatial resolution from the surface up to 20 km altitude, designed to match gridded ozone observations over Western North America. The model output supports analysis of source contributions to tropospheric ozone and other atmospheric components across diurnal to decadal timescales.
License is listed as 'other-license-specified'; users must investigate specific terms. The dataset is part of a larger multi-decadal study (1994-2021), but this specific product is for the year 1995.