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Western North America back trajectory data for 1998, generated using the FLEXPART Lagrangian particle dispersion model driven by ERA5 reanalysis. This dataset provides 15-day backward simulations from receptor locations matching gridded ozone observations, offering hourly global coverage at a 1° x 1° spatial resolution from the surface to 20 km altitude. The product was created with support from NASA's Atmospheric Composition Campaign Data Analysis and Modeling program and the NASA High-End Computing Program.
License is specified as 'other-license-specified' on datagov but is 'None' on nasa_earthdata; users must verify terms. File formats include BIN, ISO, HTML, and CSV, but specific data structure within these formats is not described.