Trends of nitrogen in air and precipitation: Model results and observations at EMEP sites in Europe, 1980-2003.

Trends of nitrogen in air and precipitation: Model results and observations at EMEP sites in Europe, 1980-2003. Research Abstract Details 

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Trends of nitrogen in air and precipitation: Model results and observations at EMEP sites in Europe, 1980-2003. Abstract Text:

We analyze trends of some nitrogen compounds using long-term measurements and results from the EMEP (co-operative programme for monitoring and evaluation of the long-range transmissions of air pollutants in Europe) chemical transport model at EMEP sites. We find statistically significant declines at the majority of sites for NH(x) (sum of ammonia and ammonium) in air and for nitrate and ammonium in precipitation, but only at a few sites for xNO(3) (sum of nitrate and nitric acid) in air. Model calculations and measurements give similar results. We demonstrate that the lack of trends for xNO(3) in air at least partly can be attributed to a shift in the equilibrium between nitric acid and ammonium nitrate towards particulate phase, caused by reductions in the sulfur dioxide emissions.

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Trends of nitrogen in air and precipitation: Model results and observations at EMEP sites in Europe, 1980-2003. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Environmental pollution (Barking, Essex : 1987)

VOLUME: 154

Page Numbers: 448-61

Journal Abbreviation: Environ. Pollut.

ISSN: 0269-7491

DAY: 12

MONTH: 03

YEAR: 2008

Trends of nitrogen in air and precipitation: Model results and observations at EMEP sites in Europe, 1980-2003. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Trends of nitrogen in air and precipitation: Model results and observations at EMEP sites in Europe, 1980-2003.

AFFILIATION: Norwegian Meteorological Institute, Research and Development Department, P.O. Box 43, Blindern, N-0313 Oslo, Norway.

Country: England

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MEDLINETA: Environ Pollut

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