Surface PM2.5

Global Estimates (V4.GL.02):

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 2008 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. 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.

Note that these estimates are primarily intended to aid in large-scale studies.  Gridded datasets are provided to allow users to agglomerate data as best meets their particular needs. Datasets are gridded at the finest resolution of the information sources that were incorporated, but do not fully resolve PM2.5 gradients at the gridded resolution due to influence by information sources at coarser resolution.

Version information is available below.

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 (V4.NA.01):

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.

Note that these estimates are primarily intended to aid in large-scale studies.  Gridded datasets are provided to allow users to agglomerate data as best meets their particular needs. Datasets are gridded at the finest resolution of the information sources that were incorporated, but do not fully resolve PM2.5 gradients at the gridded resolution due to influence by information sources at coarser resolution.

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]


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Previous Version of Global Estimates:

Version History

Version Reference
V4.GL.02 van Donkelaar, A., R. V. Martin, et al. (2016). “Global Estimates of Fine Particulate Matter using a Combined Geophysical-Statistical Method with Information from Satellites, Models, and Monitors.” Environmental Science & Technology 50(7): 3762-3772.
van Donkelaar, A., R. V. Martin, et al. (2015). “Use of Satellite Observations for Long-Term Exposure Assessment of Global Concentrations of Fine Particulate Matter.” Environmental Health Perspectives 123(2): 135-143.
V4.GL.01 van Donkelaar, A., R. V. Martin, et al. (2016). “Global Estimates of Fine Particulate Matter using a Combined Geophysical-Statistical Method with Information from Satellites, Models, and Monitors.” Environmental Science & Technology 50(7): 3762-3772.
V4.NA.01 van Donkelaar, A., R. V. Martin, et al. (2015). “High-resolution satellite-derived PM2.5 from optimal estimation and geographically weighted regression over North America.” Environmental Science & Technology 49(17): 10482-10491.
V3.01 van Donkelaar, A., R. V. Martin, et al. (2015). “Use of Satellite Observations for Long-Term Exposure Assessment of Global Concentrations of Fine Particulate Matter.” Environmental Health Perspectives 123(2): 135-143.
V2.01 van Donkelaar, A., R. V. Martin, et al. (2013). “Optimal estimation for global ground-level fine particulate matter concentrations.” Journal of Geophysical Research 118: 1–16.
V1.01 van Donkelaar, A., R. V. Martin, et al. (2010). “Global Estimates of Ambient Fine Particulate Matter Concentrations from Satellite-Based Aerosol Optical Depth: Development and Application.” Environmental Health Perspectives 118(6).
V0.01 van Donkelaar, A., R. V. Martin, et al. (2006). “Estimating ground-level PM2.5 using aerosol optical depth determined from satellite remote sensing.” Journal of Geophysical Research-Atmospheres 111(D21).

Note: V4.GL.01 provided identical PM2.5 estimates as V4.GL.02 for years 2008 and onward, but did not incorporate the additional temporal information from Boys et al (2014) and van Donkelaar et al. (2015). V4.GL.01 filenames do not contain the ‘wUni’ addendum.

 

Version 3.01

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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Version 1.01

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.