Mayewski PA, Lyons WB, Spencer MJ, Twickler M, Dansgaard W, Koci B, Davidson CI, Honrath RE. Sulfate and Nitrate Concentrations from a South Greenland Ice Core.
Science 1986;
232:975-7. [PMID:
17759282 DOI:
10.1126/science.232.4753.975]
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Abstract
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.
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