PM2.5 estimation from MODIS AOD
This product estimates daily surface PM2.5 (Particulate Matter with a diameter smaller than 2.5 microns)
during sun-lit time over the United States using AOD (aerosol optical depth)
(the Moderate Resolution Imaging Spectroradiometer).
Daily AOD is first
derived from MODIS Terra, Aqua with following criteria: use average AOD from Terra and Aqua in areas
where MODIS AOD from both satellite instruments is available; use AOD from MODIS in areas where MODIS AOD is available
from only one MODIS instrument.
The PM2.5 is then estimated from daily AOD through predefined regression relation, which are derived through model simulations.
van Donkelaar, A., R. V. Martin, M. Brauer, R. Kahn, R. Levy, C. Verduzco, and P. J. Villeneuve, Global estimates of ambient fine particulate matter concentrations from satellite-based aerosol optical depth: Development and application, Environ. Health Perspec., doi:10.1289/ehp.0901623, 2010.
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