Particulate sulfate ion concentration and SO2 emission trends in the United States from the early 1990s through 2010

Hand, J. L., Schichtel, B. A., Malm, W. C., Particulate sulfate ion concentration and SO2 emission trends in the United States from the early 1990s through 2010, Atmos. Chem. Phys., 12, 10353-10365, 10.5194/acp-12-10353-2012