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Science 23 May 1986:
Vol. 232. no. 4753, pp. 975 - 977
DOI: 10.1126/science.232.4753.975
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Articles

Sulfate and Nitrate Concentrations from a South Greenland Ice Core

P. A. MAYEWSKI 1, W. B. LYONS 1, M. J. SPENCER 1, M. TWICKLER 1, W. DANSGAARD 2, B. KOCI 3, C. I. DAVIDSON 4, and R. E. HONRATH 4

1 Glacier Research Group and Department of Earth Sciences, University of New Hampshire, Durham, NH 03824.
2 Geophysical Isotope Laboratory, University of Copenhagen, Copenhagen, Denmark.
3 Polar Ice Coring Office, University of Nebraska, Lincoln, NE 68588.
4 Department of Civil Engineering, Carnegie-Mellon University, Pittsburgh, PA 15213.

An ice core in south Greenland covering the period 1869 to 1984 was analyzed for oxygen isotopes and chloride, nitrate, and sulfate concentrations. The data show that the "excess" (nonsea-salt) sulfate concentration has tripled since approximately 1900 to 1910 and the nitrate concentration has doubled since approximately 1955. The increases may be attributable to the deposition of these chemical specis from air masses carrying North American and Eurasian anthropogenic emissions.

Submitted on November 12, 1985
Accepted on March 18, 1986


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