Atmospheric deposition in relation to acidification and by J. W. Erisman

By J. W. Erisman

During this publication the learn on atmospheric deposition of the Dutch precedence Programme on Acidification study is summarised. even supposing so much learn defined is of Dutch foundation, it's been placed right into a broader point of view via outlining the kingdom of data at the approach affecting atmospheric deposition in Europe. This has ended in distinct deposition maps for the Netherlands and Europe. the quantity is meant in the event you degree or version atmospheric deposition and ecologists attracted to publicity from atmospheric deposition, in addition to policy-makers and scholars.

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Sample text

That material added to incident precipitation may also originate from dry deposition is a comparatively recent idea postulated by Ingham in 1950. Will (1955) first showed the importance of throughfall relative to the nutrient flux in litterfall for Na, K and Mg. Madgewick and Ovington (1959) were the first to report that different forest types have unique effects in changing the concentration of precipitation (cf. Parker, 1983). Throughfall and stemflow measurements were originally used for the quantification of soil loads.

He found four times higher concentrations in moist air than under dry conditions. He also reports concentrations measured in the Underground Railway (Metropolitan), which were about a factor of 4 higher than in the city. Witz (1885) identified sulphur in cities (Paris). He compared concentrations outside and inside apartments, in the cities and in the countryside. He was at that time the only one in France interested in sulphur arising from industrial emissions. The direct effects of H2SO4 and SO2 to vegetation and indirect effects in relation to the loss of chalk as the result of SO2 taken up by the soil (acidification) were recognised at the end of the 18th century (see Tiegs, 1927 for a review).

1994). However, to assess the ecological impact of atmospheric pollutants on ecosystems, it is necessary to quantify the input of atmospheric pollutants in even more detail. Within individual land-use categories a considerable deposition variability may exist. For example, assuming an extensive, uniform forest stand, turbulent exchange between atmosphere and vegetation will be controlled to a large extent by the aerodynamic characteristics of the canopy which, in turn, will be determined by tree height and canopy density.

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