Regional visibility statistics in the United States: Natural and transboundary pollution influences, and implications for the Regional Haze Rule

Park, R. J., Jacob, D. J., Kumar, N., Regional visibility statistics in the United States: Natural and transboundary pollution influences, and implications for the Regional Haze Rule, Atmospheric Environment, 40 (28), 5405-5423, 10.1016/j.atmosenv.2006.04.059