Relation of long term and short term atmospheric sulfur concentrations to sulfate deposition in new york state usa

Barnes, C.R.

Northeastern Environmental Science 6(2): 89-98


ISSN/ISBN: 0730-630X
Accession: 006294699

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Air- and precipitation-quality records from 1965-80 indicate an annual decrease of 1.9 percent in sulfur dioxide emissions upwind of New York, an annual decrease of 1.5 percent in atmospheric particulate sulfate concentration in New York, and an annual decrease of 2.0 percent in sulfate-deposition rate in New York. Sulfate-deposition rates in bulk sampling in New York during 1965-80 were approximately 40 percent of the average sulfur-emission rate for the Northeast. Atmospheric particulate sulfate and sulfur dioxide concentrations, and sulfate concentrations in bulk, wet, and dry deposition, were measured in the summer of 1984 just outside Albany, N.Y. Sulfate-deposition rates in bulk and wetfall collectors were nearly equal and were five times greater than in the dryfall collector. Scavenging ratios for sulfate averaged 8.9 .times. 105; those for sulfate plus sulfur dioxide averaged 4.6 .times. 105. Sulfate concentrations in wet deposition averaged more than twice those estimated from published regional-scale washout equations, whereas those in dry deposition averaged only 22 percent of those computed from deposition velocities of 0.1 cm/s for sulfate and 1.0 cm/s for sulfur dioxide. Discrepancies in the dryfall results are attributed to inefficiency of dryfall-collection equipment.