Historical evidence for a dramatic increase in the nitrate component of acid rain

@article{Brimblecombe1982HistoricalEF,
  title={Historical evidence for a dramatic increase in the nitrate component of acid rain},
  author={Peter Brimblecombe and Donald H. Stedman},
  journal={Nature},
  year={1982},
  volume={298},
  pages={460-462}
}
The concentrations of nitrate and ammonium ion in rainfall have an important effect on precipitation pH. We have collected sets of rainfall analyses from non-urban sites in North America and western Europe, which start from last century, and we show here that there is a marked increase in the annual deposit of nitrate ion compared with relatively stable levels of ammonium ion deposit. The increase apparent in the data from the US parallels the increases in nitrogen oxide emissions from… Expand
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