By J.W. Erisman, G.J. Heij
Representing the complaints of the overseas Speciality convention ''Acid Rain learn; can we have sufficient answers?'', this e-book presents a beneficial end to the coordinated learn on acidification within the Netherlands from 1985 to 1994. The booklet specializes in atmospheric deposition, results of acid deposition on wooded area ecosystems within the Netherlands, and destiny acidification learn. particular awareness is given to: trace gases; ammonia; and particle deposition; and the general overview of deposition rather a lot to ecosystems and soils can also be discussed.
This quantity might be worthy to environmental scientists, ecologists, and people all in favour of atmospheric science/pollution
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Additional info for Acid Rain Research: Do We Have Enough Answers?
The deposition will be monitored by the micro-meteorological gradient method. This indirect method is used because monitors fast enough to be used in the eddy correlation method are not available. The deposition flux is determined from measurements of the concentration of gases at several heights above the forest and a turbulent diffusion coefficient k2 Over low vegetation this diffusion coefficient can be determined from empirical flux-profile functions given in the literature. Because of the large roughness and the use of towers barely extending above the canopy the situation is more complex over forest.
Heij and J. W Erisman (Editors). Acid Rain Research: Do we have enough answers? 0 1995 Elsevier Science BY All rights reserved. 31 Deposition of nitrogen oxides and ozone to Danish forest sites K. O. Jensenband P. Hummelshaj* "Environmental Science and Technology Department, Risa National Laboratory, DK-4000 Roskilde, Denmark *Meteorologyand Wind Energy Department, Risa National Laboratory, DK-4000 Roskilde, Denmark Abstract Preliminary results of eddy correlation measurements of fluxes of NOz, and 0 3 made over a coniferous and a deciduous forest site in Denmark are presented.
RESULTS AND DISCUSSION All instruments were operated from December 1992 to September 1993. For several different reasons a large fraction of the data obtained in the wintertime appeared to be unreliable. For the analysis presented here only the data from the period April 1993 to September 1993 were used. Roughly 2500 successful twenty minute measurements of the eddy correlation flux were available. The gradient measurements yielded nearly 3500 successful runs. 1. General Figure 2 shows a typical result of the eddy correlation measurements on July 9 and 10, 1993.
Acid Rain Research: Do We Have Enough Answers? by J.W. Erisman, G.J. Heij