by Koninklijk Nederlands Aardrijkskundig Genootschap, Faculteit Ruimtelijke Wetenschappen, Rijksuniversiteit Utrecht in Utrecht .
Written in English
|Series||Nederlandse geografische studies,, 156|
|LC Classifications||QK751 .D73 1993|
|The Physical Object|
|Pagination||200 p. :|
|Number of Pages||200|
|ISBN 10||9068091662, 9062660983|
|LC Control Number||94143775|
1. Introduction. Forest ecosystems have been exposed to increased atmospheric deposition of sulphur (S) in the form of sulphate (SO 4 2−) and inorganic nitrogen (N) since the s, resulting from anthropogenic emissions of sulphur dioxide (SO 2), nitrogen oxides (NO x) and ammonia (NH 3).Deposition of these compounds is a major driver for various changes in forest by: Even when using in this option, atmospheric deposition contributed most to the proton input to the forest soil, i.e. about kmol H + ha −1 (with a range from − to kmol H + ha −1), while forest BC uptake induced H + input was kmol H + ha −1 (with a range from to kmol H + ha −1) during the early s and the Cited by: Atmospheric mercury (Hg) deposition to forests is important because half of the land cover in the eastern USA is forest. Mercury was measured in autumn litterfall and weekly precipitation samples at a total of 27 National Atmospheric Deposition Program (NADP) monitoring sites in deciduous and mixed deciduous-coniferous forests in 16 states in the eastern USA during –Cited by: Forests are an important biome that covers about one third of the global land surface and provides important ecosystem services. Since atmospheric deposition of nitrogen (N) can have both beneficial and deleterious effects, it is important to quantify the amount of N deposition to forest .
Few studies of total atmospheric deposition of major elements (S, N, Ca, Mg, and K) have been conducted in high-elevation forests. This paper presents the results of the first long-term observations () of total atmospheric deposition (wet + dry + cloud water) to a subalpine forest in the northeastern USA. We compiled published and newly-obtained data on the directly-measured atmospheric deposition of total phosphorus (TP), filtered total phosphorus (FTP), and inorganic phosphorus (PO 4-P) to open land, lakes, and marine resulting global data base includes data for c. sites, covering the period to Most (82%) of the measurement locations are in Europe and North America. Moss samples were collected at forest and nearby fields. • Pb and Be-7 were measured using low background HPGe detector. • Expected seasonal difference in 7 Be deposition were observed.. Deposition of 7 Be at fields is two times higher than in the forests.. 7 Be can reside on the leaves up to 50 days before precipitations wash it out. Variability of throughfall volume and ion deposition were measured under a mixed hardwood forest using 36 or 72 collectors from to during the growing period (May to October) for events. The ions showing the highest variability in results were (in decreasing order) NH 4 +, H +, Mg 2+, K +, Ca 2+, Cl -, Na +, NO 3 -, and SO.
To determine the patterns of atmospheric deposition and throughfall in the vicinity of a large city, bulk deposition, oak forest throughfall, and particulate dust deposition were measured at sites along a transect within and to the north of New York City. Concentrations and fluxes of NO3-, NH4+, Ca2+, Mg2+, SO, and Cl- in throughfall all declined significantly with distance from the city. Geographic Factors Explain the Variability of Atmospheric Deposition of Sulfur and Nitrogen onto Coniferous Forests Within and Beyond the Tokyo Metropolis. The deposition of reactive nitrogen from the atmosphere to forests occurs mainly as a result of agricultural fertilizer use and fossil-fuel combustion, and has increased from 15 million tonnes of. Forests have long been considered as efficient sinks for atmospheric pollutants. The potential for large rates of deposition is provided by the turbulent structure of air above and within forest.