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Most time-sequenced ambient air pollution data in China is published through daily Air Quality Index (AQI). However, few studies have used the AQI data to calibrate satellite-based estimates of fine particulate matter (PM2.5, particles no greater than 2.5μm in aerodynamic diameter) concentrations, partly because the AQI-derived PM2.5 is not continuously obtained each day. Taking Beijing as an example,...
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