Abstract
Information was presented that implied the Hubbard Brook Ecosystem Study precipitation chemistry data base may have been compromised by the presence of a small paper-making facility some 10 km to the north at Lincoln, New Hampshire. The plant operated on coal until 1969, intermittently until 1972, and then converted to oil in 1975. The article by Coffey stated the impact (of the plant) upon the site would tend to mask the effects of regional sulfur dioxide reductions. This note examines this charge. This author computed SO/sub 2/ concentration from ground level and elevated, stack level. It was concluded that this data indicated that any influences of local pollution sources on the Hubbard Brook precipitation chemistry are quite minimal, as indicated by both theoretical analysis of the source characteristics and statistical analysis of the precipitation chemistry record per se. Although there are substantial year to year variations, a large portion of the sulfate variance is explained by variations in seasonality and precipitation. The balance is due to meteorological variability and emission variations, but there is no firm statistical evidence as to which source or group of sources is influencing Hubbard Brook precipitation chemistry. This inquiry, in response to Coffey's allegation, hasmore » shown the necessity for understanding local source effects on precipitation chemistry as a prerequisite to full understanding and interpretation of monitoring data. 13 references, 1 table.« less
Published Version
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