Nine years of measurements of atmospheric nitrogen and sulphur deposition to Danish forest |
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Authors: | M F Hovmand H V Andersen |
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Institution: | 1. National Environmental Research Institute, Post Box 358, DK 4000, Roskilde, Denmark
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Abstract: | Since 1985 measurements of gasses, aerosols, precipitation and throughfall have been carried out at three forest sites in Denmark with equal aged Norway Spruce plantations. The times series show a downward trend in the concentration of sulphur dioxide. Particulate sulphate, ammonia and particulate ammonium and the total nitrate seem to have a more constant concentration level. The wet deposition measurements show a decreasing trend in the content of acid (protons), sulphate, ammonium and nitrate, though for the nitrogen compounds it is only a slight fall. A decrease in concentrations of protons and sulphate is also seen in the throughfall measurements, in throughfall the nitrogen compounds hardly seem to decrease. |
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Keywords: | Key word index" target="_blank">Key word index Trend gas aerosol bulk precipitation throughfall acid deposition |
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