The Global Annual PM2.5 Grids from MODIS, MISR and SeaWiFS Aerosol Optical Depth (AOD) data sets represent a series of three-year running mean grids (1998-2012) of fine particulate matter (solid parti
Each row corresponds to an individual analyzed several times at intervals of one year or more. Year1 corresponds to the first year of analysis and Year2, Year3, Year4 correspond to the following years
