The user may be interested in a yearly, global PM2.5 data product derived from multiple missions available here: https://sedac.ciesin.columbia.edu/data/ ... eawifs-aod
For PM and related data access and visualization, the user might find useful the ARSET training provided here: https://arset.gsfc.nasa.gov/airquality/ ... ced-AOD-PM
For global circulation modeling, they should refer to the GEOS model or the MERRA-2 model at https://gmao.gsfc.nasa.gov/
Other upcoming missions with relevant data/sensors include:
MAIA: To be launched in 2022 (which will provide PM2.5 product)
TEMPO: To be launched in 2022
Korean: GEMS sensor onboard GEO-KOMPSAT 2B (to be launched in 2019):
Also, some airborne field campaigns measure air quality parameters (e.g. DISCOVER-AQ, KORUS-AQ), but those are limited in spatial and temporal domain because of the nature of airborne campaigns. For direct measurements of PM2.5, government ground sensor networks collect direct measurement in the USA. Data sources from the EPA can be found at www.airnow.gov. There are private sensor networks as well.