Results 251 to 260 of about 1,677,076 (289)

Atmospheric Nitrogen Deposition

Science, 1997
David A. Wedin and David Tilman (Reports, 6 Dec., p 1720 ) show that increased nitrogen inputs to terrestrial ecosystems might cause smaller increases in the capacity of those ecosystems to store carbon than expected.
Bruce A. Hungate, Thomas E. Jordan, Robert B. Jackson, Bert G. Drake   +3 more
openaire   +1 more source

Nitrogen deposition in California forests: A review

Environmental Pollution, 1996
Atmospheric concentrations and deposition of the major nitrogenous (N) compounds and their biological effects in California forests are reviewed. Climatic characteristics of California are summarized in light of their effects on pollutant accumulation and transport.
A, Bytnerowicz, M E, Fenn
openaire   +2 more sources

Diagnostic indicators of elevated nitrogen deposition

Environmental Pollution, 2006
Tissue N content of mosses, which has been shown to be an indicator of enhanced N, was studied at a range of locations dominated either by wet or dry deposited and oxidised and reduced forms of N. Tissue N responded differently to wet and dry deposited N.
Pitcairn, Carole, Fowler, David, Leith, Ian, Sheppard, Lucy, Tang, Sim, Sutton, Mark, Famulari, Daniela   +6 more
openaire   +4 more sources

Excess nitrogen deposition: Issues for consideration

Environmental Pollution, 1988
This paper briefly reviews some major mechanisms by which deposition of inorganic N compounds from the atmosphere could be damaging forest and natural ecosystems. Twelve issues which needed further discussion or research were identified. These were: has N deposition increased; what is a N-saturated ecosystem; can the time of onset of N saturation be ...
R A, Skeffington, E J, Wilson
openaire   +2 more sources

Progress in Nitrogen Deposition Monitoring and Modelling

2014
The chapter reviews progress in monitoring and modelling of atmospheric nitrogen (N) deposition at regional and global scales. The Working Group expressed confidence in the inorganic N wet deposition estimates in U.S., eastern Canada, Europe and parts of East Asia. But, long-term wet or dry N deposition information in large parts of Asia, South America,
Aas, Wenche, Carou, Silvina, Alebic-Juretic, Ana, Aneja, Viney P., Balasubramanian, Rajasekhar, Berge, Haldis, Cape, J. Neil, Delon, Claire, Denmead, O. Tom, Dennis, Robin L., Dentener, Frank, Dore, Anthony J., Du, Enzai, Forti, Maria Cristina, Galy-Lacaux, Corinne, Geupel, Markus, Haeuber, Richard, Iacoban, Carmen, Komarov, Alexander S., Kubin, Eero, Kulshrestha, Umesh C., Lamb, Brian, Liu, Xuejun, Patra, D.D., Pienaar, Jacobus J., Pinho, Pedro, Rao, P.S.P., Shen, Jianlin, Sutton, Mark A., Theobald, Mark R., Vadrevu, Krishna P., Vet, Robert   +31 more
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Calculating nitrogen deposition in Europe

Water, Air, and Soil Pollution, 1989
Nitrogen deposition calculations for Europe were performed by separate models describing the long-range transport of ammonia and oxidized N. A linearized version of a non-linear atmospheric chemistry model was used for calculating oxidized N. Model computations were found to be consistent with the observed spatial pattern of wet nitrate deposition in ...
Bartnicki, J., Alcamo, J.
openaire   +3 more sources

Deposition of nitrogen into the North Sea

Atmospheric Environment, 2003
The flux of nitrogen species from the atmosphere into the ocean, with emphasis on coastal waters, was addressed during the ANICE project (Atmospheric Nitrogen Inputs into the Coastal Ecosystem). ANICE focused on quantifying the deposition of atmospheric inputs of inorganic nitrogen compounds (HNO3, NO3-, NH3 and NH4+) into the North Sea and the ...
de Leeuw, Gerrit, Skjøth, Carsten Ambelas, Hertel, Ole; id_orcid 0000-0003-0972-7735, Jickells, Tim, Spokes, Lucy, Vignati, Elisabetta, Frohn, Lise; id_orcid 0000-0002-4236-5708, Frydendall, J, Tamm, Susanna, Schulz, Michael, Sørensen, Lise Lotte; id_orcid 0000-0002-9823-589X   +10 more
openaire   +7 more sources

Deposition of sulphur and nitrogen compounds in Croatia

Water, Air, & Soil Pollution, 1995
Since precipitation is an efficient scavenger of pollutants, concentrations of major ions in precipitation reflect changes in chemistry of the atmosphere and in the subsequent exposure of various ecosystems to deposition. The National Atmospheric Precipitation Chemistry programme was initiated in 1978 and operated by Meteorological and Hydrological ...
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Epitaxial deposition of silicon in nitrogen

Journal of Crystal Growth, 1972
It is difficult to grow uniform lightly doped epitaxial silicon layers on heavily doped (∼1020 cm−3 substrates. This work was undertaken to determine the effect of low ( < 800 °C) deposition temperatures and the effect of a change in carrier gas from hydrogen to nitrogen. The method of preparation and physical properties are reported in this paper. The
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Atmospheric nitrogen deposition in Switzerland

Increased atmospheric nitrogen (N) deposition into sensitive ecosystems is leading to soil acidification, nutrient imbalances and biodiversity losses. Therefore, N depositions were quantified throughout Switzerland in 2000, 2014, 2019 and 2024 measuring the concentrations of seven different inorganic N compounds in wet and dry gravitational as well as ...
Mario Meier, Zaida Ehrenmann, Eva Seitler   +2 more
openaire   +1 more source