Surface PM2.5

Global Estimates:

We estimate ground-level fine particulate matter (PM2.5) 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.

References:
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. [Link]

Estimates prior to 2007 incorporate temporal information from:

Boys, B.L., Martin, R.V., van Donkelaar, A., MacDonell, R., Hsu, N.C., Cooper, M.J., Yantosca,R.M., Lu, Z., Streets,D.G., Zhang,Q., Wang,S., Fifteen-year global time series of satellite-derived fine particulate matter, Environ. Sci. Technol, 10.1021/es502113p, 2014. [Link]

van Donkelaar, A., R. V. Martin, M. Brauer and B. L. Boys, Global fine particulate matter concentrations from satellite for long-term exposure assessment, Environmental Health Perspectives, 123, 135-143, DOI:10.1289/ehp.1408646, 2015. [Link]

Scientific Datasets:
Global resolved datasets are provided in ArcGIS-compatible NetCDF [.nc] or zipped ASCII [.asc.zip] file. Note that the unzipped ASCII files can be cumbersome. Gridded files use the WGS84 projection. The 0.01° × 0.01° grid contains 12500 latitude coordinates, with centres from 54.995°S to 69.995°N, and 36000 longitude coordinates, with centres from 179.995°W to 179.995°E. The 0.1° × 0.1° grid contains 1250 latitude coordinates, with centres from 54.95°S to 69.95°N, and 3600 longitude coordinates, with centres from 179.95°W to 179.95°E. Corresponding files for Google Earth are also provided [.kmz]. Country means are also provided in a comma separated ascii (.csv) format. Dust and Sea-Salt Removed PM2.5 estimates apply simulated compositional information to our full-composition values, following van Donkelaar et al., EHP, 2015. Other extractions can often be produced upon request. Please contact Aaron van Donkelaar (Aaron.van.Donkelaar@dal.ca) for further information.

All Composition PM2.5:

Satellite-Derived PM2.5, 1998, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 1999, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2000, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2001, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2002, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2003, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2004, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2005, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2006, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2007, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2008, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2009, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2010, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2011, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2012, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2013, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2014, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2015, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Dust and Sea-Salt Removed:

Satellite-Derived PM2.5, 1998, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 1999, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2000, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2001, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2002, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2003, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2004, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2005, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2006, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2007, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2008, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2009, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2010, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2011, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2012, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2013, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2014, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

Satellite-Derived PM2.5, 2015, at 35% RH [ug/m3]
0.1° × 0.1° [.nc] [.asc.zip] [.kmz] [.csv]
0.1° × 0.1° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]
0.01° × 0.01° w GWR adjustment [.nc] [.asc.zip] [.kmz] [.csv]

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North American Estimates with Ground-Monitor Based Adjustment:

We estimate ground-level fine particulate matter (PM2.5) over North America by combining a 0.01 degree x 0.01 degree resolution optimal estimate-based Aerosol Optical Depth (AOD) retrieval from the NASA MODIS instrument with aerosol vertical profile and scattering properties simulated by the GEOS-Chem chemical transport model. We then use a geographically weighted regression (GWR) that incorporates ground-based observations to adjust for any residual bias in the satellite-derived PM2.5 estimates. Value prior to 2004 use apply the temporal variation of Boys et al., to the GWR-adjusted period.

Reference:
van Donkelaar, A., R. V. Martin, R. J. D. Spurr and R. T. Burnett, High-resolution satellite-derived PM2.5 from optimal estimation and geographically weighted regression over North America, Environ. Sci. and Tech., doi 10.1021/acs.est.5b02076 [Link]

Boys, B.L., Martin, R.V., van Donkelaar, A., MacDonell, R., Hsu, N.C., Cooper, M.J., Yantosca,R.M., Lu, Z., Streets,D.G., Zhang,Q., Wang,S., Fifteen-year global time series of satellite-derived fine particulate matter, Environ. Sci. Technol, 10.1021/es502113p, 2014. [Link]

Google Earth Datasets:
A small selection of regional Mean Satellite-Derived PM2.5 estimates have been cut for import into Google Earth. Click on placemarks labelled ‘PM2.5′ for the legend. For additional regions, please contact Aaron van Donkelaar (Aaron.van.Donkelaar@dal.ca).

Satellite-Derived PM2.5 with GWR, North America, 1998-2000, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 1999-2001, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2000-2002, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2001-2003, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2002-2004, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2003-2005, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2004-2006, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2005-2007, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2006-2008, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2007-2009, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2008-2010, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2009-2011, at 35%RH [ug/m3] [.kmz]
Satellite-Derived PM2.5 with GWR, North America, 2010-2012, at 35%RH [ug/m3] [.kmz]

Scientific Datasets:
Global resolved datasets are provided in an ArcGIS-compatible ASCII file. Other extractions can often be produced upon request. Please contact Aaron van Donkelaar (Aaron.van.Donkelaar@dal.ca) for further information.

Satellite-Derived PM2.5 with GWR, North America, 1998-2000, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 1999-2001, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2000-2002, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2001-2003, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2002-2004, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2003-2005, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2004-2006, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2005-2007, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2006-2008, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2007-2009, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2008-2010, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2009-2011, at 35%RH [ug/m3] Resolved [.asc.zip]
Satellite-Derived PM2.5 with GWR, North America, 2010-2012, at 35%RH [ug/m3] Resolved [.asc.zip]

———————————————————————————

Previous Version of Global Estimates:

References:
Boys, B.L., Martin, R.V., van Donkelaar, A., MacDonell, R., Hsu, N.C., Cooper, M.J., Yantosca,R.M., Lu, Z., Streets,D.G., Zhang,Q., Wang,S., Fifteen-year global time series of satellite-derived fine particulate matter, Environ. Sci. Technol, 10.1021/es502113p, 2014. [Link]

van Donkelaar, A., R. V. Martin, M. Brauer and B. L. Boys, Global fine particulate matter concentrations from satellite for long-term exposure assessment, Environmental Health Perspectives, 123, 135-143, DOI:10.1289/ehp.1408646, 2015. [Link]

Google Earth Datasets:
A small selection of regional Mean Satellite-Derived PM2.5 estimates have been cut for import into Google Earth. These correspond to 2001-2010 concentrations adjusted to 35% relative humidity. Click on placemarks labelled ‘PM2.5′ for the legend. For additional regions, please contact Aaron van Donkelaar (Aaron.van.Donkelaar@dal.ca).

Eastern Asia, [.kmz]
Eastern North America, [.kmz]
Europe, [.kmz]
Global, [.kmz]

Scientific Datasets:
Global resolved datasets are provided in an ArcGIS-compatible ASCII file. Country means are provided in a comma separated ascii (.csv) format. Other extractions can often be produced upon request. Please contact Aaron van Donkelaar (Aaron.van.Donkelaar@dal.ca) for further information.

All Composition:

Satellite-Derived PM2.5, 2001-2010, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]

Satellite-Derived PM2.5, 1998-2000, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 1999-2001, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2000-2002, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2001-2003, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2002-2004, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2003-2005, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2004-2006, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2005-2007, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2006-2008, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2007-2009, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2008-2010, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2009-2011, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2010-2012, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2011-2013, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2012-2014, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]

Satellite-Derived PM2.5 Trend, 1998-2012, at 35% RH [ug/m3] Resolved [.asc.zip]

Dust and Sea-Salt Removed:

Satellite-Derived PM2.5, 2001-2010, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]

Satellite-Derived PM2.5, 1998-2000, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 1999-2001, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2000-2002, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2001-2003, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2002-2004, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2003-2005, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2004-2006, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2005-2007, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2006-2008, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2007-2009, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2008-2010, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2009-2011, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2010-2012, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2011-2013, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]
Satellite-Derived PM2.5, 2012-2014, at 35% RH [ug/m3] Resolved [.asc.zip] Country Mean [.csv]

Format:
All data are provided in a GIS-friendly ASCII format.

Ground-level PM2.5 observations collected for validation of van Donkelaar et al. (above) are also publicly available in an Excel spreadsheet [.xlsx].

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References:
van Donkelaar, A., R.V. Martin, M. Brauer, R. Kahn, R. Levy, C. Verduzco, and P.J. Villeneuve, Global estimates of exposure to fine particulate matter concentrations from satellite-based aerosol optical depth, Environ. Health Perspec., doi:10.1289/ehp.0901623, 118(6), 2010. [Full Text (PDF)]

Google Earth Datasets:
A small selection of regional Annual Mean Satellite-Derived PM2.5 estimates have been cut for import into Google Earth (the whole dataset is too big for a single file). These correspond to mean 2001-2006 values adjusted to the given relative humidities (RH). For additional regions, please contact Aaron van Donkelaar (Aaron.van.Donkelaar@dal.ca).

Eastern North America at 35% RH, [.kmz]
Canada at 35% RH, [.kmz]
USA at 35% RH, [.kmz]
Europe at 50% RH, [.kmz]
Eastern Asia at 50% RH, [.kmz]

Available Scientific Datasets:
Annual Mean Satellite-Derived PM2.5, 2001-2006, at 35% RH [ug/m3] [.csv.zip] [.csv] [.ASCII.zip] [.TIF.zip]
Annual Mean Satellite-Derived PM2.5, 2001-2006, at 50% RH [ug/m3] [.csv.zip] [.csv] [.ASCII.zip] [.TIF.zip]
Annual Mean Satellite-Derived PM2.5 Total Number of Observations [counts], 2001-2006 [.csv.zip] [.csv] [.ASCII.zip] [.TIF.zip]
Annual Mean Satellite-Derived PM2.5 Uncertainty [%], 2001-2006 [.csv.zip] [.csv]
Annual Mean Combined MODIS/MISR AOD [unitless], 2001-2006 [.csv.zip] [.csv]

Format:
All data are provided in a comma-separated, ASCII file. The first row/column indicate longitude/latitude centres, respectively. Missing values or water are denoted by -999. Thanks to Andy Davidson for providing the GIS-friendly .TIF.zip and .ASCII.zip files.