V5.NA.04.02
North American Regional Estimates
- retired -
We estimate ground-level fine particulate matter (PM₂.₅) total and compositional mass concentrations over North America by combining Aerosol Optical Depth (AOD) retrievals (Dark Target, Deep Blue, and MAIAC) that use observations from multiple satellite-based NASA instruments (MODIS/Terra, MODIS/Aqua, MISR/Terra, SeaWiFS/SeaStar, VIIRS/SNPP, and VIIRS/NOAA20) with the GEOS-Chem chemical transport model (http://geos-chem.org), and subsequently calibrated to regional ground-based observations of both total and compositional mass using Geographically Weighted Regression (GWR) for 2000-2022.
Reference:
van Donkelaar, A., R. V. Martin, B. Ford, C. Li, A. J. Pappin, S. Shen, and D. Zhang, North American Fine Particulate Matter Chemical Composition for 2000–2022 from Satellites, Models, and Monitors: The Changing Contribution of Wildfires., ACS ES&T Air, doi: 10.1021/acs.est.0c01764, 2024. [Link]
Annual and Biweekly datasets are provided in NetCDF [.nc] or a zipped ArcGIS-compatible ASCII [.asc.zip] file. Note that the unzipped ASCII files can be cumbersome. Gridded files use the WGS84 projection. Contact our Support Team (support@satpm.org) for further information.
Annual, monthly, and biweekly mean total and component PM₂.₅ [µg/m3] at 0.01° × 0.01°:
[ASCII]
[NetCDF]
The contribution of biomass burning to annual, monthly, and biweekly mean total and component PM₂.₅[µg/m3] at 0.01° × 0.01°, as described in the above publication, is additionally available from:
[ASCII]
[NetCDF]
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 (0.01° × 0.01°), but do not fully resolve PM₂.₅ gradients at the gridded resolution due to influence by information sources at coarser resolution.
SatPM₂.₅ data V5.NA.04.02 are licensed under CC BY 4.0