The NOAA Federated Aerosol Network (NFAN) monitors surface in-situ aerosol optical properties at field sites around the world. At a subset of NFAN sites, aerosol microphysical and chemical properties are also measured in collaboration with partner organizations.

For an overview and information about the NFAN see:

• Andrews, E., Sheridan, P.J., Ogren, J.A. et al. (2019), "Overview of the NOAA/ESRL Federated Aerosol Network" Bulletin of the American Meteorological Society, 100,123-135, 2019.