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Comment
. 2005 Oct 11;102(41):14487-8.
doi: 10.1073/pnas.0507389102. Epub 2005 Oct 3.

From icy roads to salty streams

Robert B Jackson  1 , Esteban G Jobbágy
Affiliations
Comment

From icy roads to salty streams

Robert B Jackson et al. Proc Natl Acad Sci U S A. .
No abstract available

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Figures

Fig. 1.
Fig. 1.
Sales of rock salt for highway use in the U.S. from 1940 to 2004 in millions of metric tons (Mg) (1, 2). The dashed line denotes our estimate of the calculated annual wet deposition of Na and Cl in the U.S., derived primarily from sea salt. The amount of Na and Cl in road salt topped Na and Cl deposition for the continental U.S. some time in the early 1960s. We estimated U.S. wet deposition of NaCl based on data from 1999-2003 using deposition isopleth maps from ref. . The product of mean area and deposition rates for each isopleth interval was calculated by state and summed. For Na and Cl, rates of dry deposition should be smaller than rates of wet deposition.
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References

    1. Ewell, M. E. (2003) Mining and Quarrying Trends 2003 (U.S. Geological Survey, U.S. Department of the Interior, Washington, DC).
    1. The Salt Institute (2004) Salt Mining Statistics (The Salt Institute, Alexandria, VA).
    1. Kaushal, S. S., Groffman, P. M., Likens, G. E., Belt, K. T., Stack, W. P., Kelly, V. R., Band, L. E. & Fisher, G. T. (2005) Proc. Natl. Acad. Sci. USA 102, 13517-13520. - PMC - PubMed
    1. Peters, N. E. & Turk, J. T. (1981) Water Resour. Bull. 17, 586-598.
    1. Siver, P. A., Canavan, R. W., Field, C. K., Marsicano, L. J. & Lott, A. M. (1996) J. Environ. Qual. 25, 334-345.

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