The National Atmospheric Deposition Program-National Trends Network (NADP-NTN) has measured the concentrations of acids, nutrients, and base cations in precipitation for more than two decades in the U.S. These trends in precipitation chemistry reflect changes in the chemical climate of the US. Significant increases were observed in much of the U.S. for ammonium and dissolved inorganic nitrogen. There were regionally-significant increases and decreases in nitrate.
|Original language||English (US)|
|Number of pages||18|
|Journal||Proceedings of the Air and Waste Management Association's Annual Meeting and Exhibition|
|State||Published - Dec 1 2004|
|Event||Proceedings of the A and WMA's 97th Annual Conference and Exhibition; Sustainable Development: Gearing Up for the Challenge - Indianapolis, IN, United States|
Duration: Jun 22 2004 → Jun 25 2004
ASJC Scopus subject areas