Widespread reductions in haze across the United States from the early 1990s through 2011 von Hand, J.L., Schichtel, B.A., Malm, W.C., Copeland, S., Molenar, J.V., Frank, N., Pitchford, M.

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Time-related changes in snow chemistry — Ross Ice Shelf, Antarctica von Warburton, J.A., Molenar, J.V., Cornish, C.R., Owens, M.S., Young, L.G.

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