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Science 13 January 1984:
Vol. 223. no. 4632, pp. 132 - 139
DOI: 10.1126/science.223.4632.132
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Articles

Elemental Tracers of Distant Regional Pollution Aerosols

Kenneth A. Rahn 1 and Douglas H. Lowenthal 2

1 Research professor in the Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett 02882-1197.
2 Research specialist in the Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett 02882-1197.

A seven-element tracer system shows that regional pollution aerosols of both North America and Europe have characteristic signatures that can be followed into remote areas up to several thousand kilometers downwind. In aerosols of mixed origin, regional contributions to the tracer elements can be resolved by least-squares procedures. After transport of several hundred kilometers, secondary sulfate can also be apportioned satisfactorily. Regional elemental tracers thus offer a way to determine the sources of pollution aerosol in important areas such as the northeastern United States, Scandinavia, and the Arctic.


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