Air Quality: Surface PM2.5 Concentrations

Estimate of ground-level fine particulate matter (PM2.5) from satellite data

  • Source: Dal ACAG
  • Last update: -

The Atmospheric Composition Analysis Group at Dalhousie University (Dal U ACAG) created the ground-level fine particulate matter (PM2.5) data set by combining aerosol optical depth (AOD) retrievals from the NASA MODIS, MISR, and SeaWIFS instruments with the GEOS-Chem chemical transport model, and subsequently calibrated the retrievals to global ground-based observations of PM2.5 using geographically weighted regression (GWR). Resource Watch shows only a subset of the data set. For access to the full data set and additional information, see the Learn More link.

Customize Visualization

Formal name

Annual averaged 0.01° × 0.01° w GWR adjustment PM2.5


These data are calculated and caution should be used when making decisions based on this information.

Suggested citation

van Donkelaar, A., R.V Martin, M.Brauer, N. C. Hsu, R. A. Kahn, R. C Levy, A. Lyapustin, A. M. Sayer, and D. M Winker, Global Estimates of Fine Particulate Matter using a Combined Geophysical-Statistical Method with Information from Satellites, Models, and Monitors, Environ. Sci. Technol, doi: 10.1021/acs.est.5b05833, 2016. Accessed through Resource Watch, (date).


Dalhousie University Atmospheric Composition Analysis Group (Dal ACAG)

Geographic coverage


Spatial resolution


Date of content


Frequency of updates

2 years

Published language



Similar datasets