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Acid rain: statistical analysis of ionic correlations questioned.

In analyzing data on the chemical composition of rainwater, Gorham et al, claim that hydrogen ions are correlated much more closely with sulfate than with nitrate and also that the H/sup +/ correlation with the sum of SO/sub 4//sup 2 -/ and NO/sub 3//sup -/ is slightly less than that between H/sup +/ and SO/sub 4//sup 2 -/ alone. Here, the authors point out several shortcomings in this analysis, and suggest that less sweeping conclusions are appropriate. A reply by the original authors is included. 3 references.