Atmospheric Composition Analysis Group (ACAG) North American Regional Estimates with Composition

The Atmospheric Composition Analysis Group (ACAG) North American Regional Estimates with Composition (V4.NA.03) dataset presents estimated annual average fine particulate matter (PM2.5) air pollution total and compositional mass concentrations. This dataset covers North America with 0.01 degree (~1 km) spatial resolution during 2000 to 2018. Concentrations are estimated using satellite-based air pollution observations combined with a chemical transport model and subsequent calibration to ground-based air pollution observations using geographically weighted regression. This dataset covers total PM2.5 and the following PM2.5 components: black carbon (BC), ammonium (NH4), nitrate (NO3), sulfate (SO4), organic matter, mineral dust, and sea salt. This dataset is intended for use in large-scale, long-term epidemiological studies and health impact assessments.