Acidic precipitation at a site within the northeastern conurbation
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In: Dochinger, L. S.; Seliga, T. A., eds. Proceedings of the first international symposium on acid precipitation and the forest ecosystem; Gen. Tech. Rep. NE-23. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 267-279
Rain and snow were collected in plastic beakers either manually or with a Wong sampler during 58 precipitation events in 1974 at Yonkers, New York approximately 24 km north of the center of New York City. Determinations were made of total dissolved ionic species, free hydrogen ions, total hydrogen ions, sulfate, nitrate, chloride, and fluoride. Conductivity measurements ranged from 618 to 162 umhos, pH from 3.4 to 4.9, total acidity from 36 to 557 ueg/l sulfate from less than 1 to 20 mg/l, nitrate from less than 1 to 14 mg/l, and chloride from less than 1 to 7 mg/l. All fluoride concentrations were less than 0.1 mg/l. The results indicate that precipitation at this suburban location adjacent to New York City is consistently acidic and contains concentrations of sulfate, nitrate, and chloride which are similar to values found for other locations in the northeastern United States. Positive correlations were found between nitrate and sulfate concentrations and acidity suggesting that the atmospheric contaminants, sulfur and nitrogen dioxide, are causally-related to the occurrence of acidic precipitation. Further research will be necessary to clarify the relative influence of natural and man-made sources of nitrogen and sulfur compounds and the contributions of gaseous and particulate contaminants in the atmosphere to the acidity of precipitation at this location.
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Jacobson, Jay S.; Heller, Laurence I.; Van Leuken, Paul. 1976. Acidic precipitation at a site within the northeastern conurbation. In: Dochinger, L. S.; Seliga, T. A., eds. Proceedings of the first international symposium on acid precipitation and the forest ecosystem; Gen. Tech. Rep. NE-23. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 267-279