About the Data:  Surface particulate matter (PM2.5) mass concentration (ug/m3) have been estimated 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 to global ground-based observations of PM2.5 using Geographically Weighted Regression (GWR) as detailed in the below reference.

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.

Original Data Source:

Dalhousie University, Canada 

Disclaimer: SatAQ downloaded data from Dalhousie University, Canada on December 24, 2016. SatAQ has not perform any modifcation to the data sets and only providing visualization and analysis.

If you find any unsual data value or bug, please email us at sataqcontact@gmail.com
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