Abstract
THERE is a definite relation between specific conductivity (x18 = n × 10-6) and active reaction (expressed as pH, and indicating the concentration of hydroxonium (H3O +) ions) in lake waters. Within a single lake these values vary inversely, which really means that the concentrations of electrolytes and H3O + ions move together. Biological processes deplete surface waters of carbon dioxide and dissolved salts. There is a corresponding increase in the deep, where dead organisms sinking down from the fertile, sunlit surface ('trophogenic' zone) disintegrate in the bottom waters ('tropholytic' zone). From lake to lake there is, however, a positive correlation between pH and x18.
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STRØM, K. Correlation Between x18 and pH in Lakes. Nature 159, 782–783 (1947). https://doi.org/10.1038/159782b0
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DOI: https://doi.org/10.1038/159782b0
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