Monitoring Long-term Trends in Sulfate and Ammonium in US Precipitation: Results from the National Atmospheric Deposition Program/National Trends Network

@article{Lehmann2007MonitoringLT,
  title={Monitoring Long-term Trends in Sulfate and Ammonium in US Precipitation: Results from the National Atmospheric Deposition Program/National Trends Network},
  author={Christopher M. B. Lehmann and Van C. Bowersox and Robert S. Larson and Susan M. Larson},
  journal={Water, Air, & Soil Pollution: Focus},
  year={2007},
  volume={7},
  pages={59-66}
}
Data from the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) indicate significant changes have occurred in precipitation chemistry and the chemical climate in the United States (US). A Seasonal Kendall Trend (SKT) analysis shows statistically significant increases in precipitation ammonium concentrations at 64% of 159 continental US NADP/NTN sites evaluated from Winter 1985 to Fall 2004 (Dec. 1984 – Nov. 2004). Sulfate decreases were widespread, with an SKT analysis… CONTINUE READING

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