By J.W. Erisman, G.J. Heij
Representing the lawsuits of the foreign Speciality convention ''Acid Rain study; will we have sufficient answers?'', this publication offers a useful end to the coordinated learn on acidification within the Netherlands from 1985 to 1994. The e-book makes a speciality of atmospheric deposition, results of acid deposition on wooded area ecosystems within the Netherlands, and destiny acidification learn. designated cognizance is given to: trace gases; ammonia; and particle deposition; and the final review of deposition a lot to ecosystems and soils can also be discussed.
This quantity can be worthwhile to environmental scientists, ecologists, and people interested by atmospheric science/pollution
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Extra resources for Acid Rain Research: Do We Have Enough Answers?
Dry deposition of SO, onto a wheat canopy (16/04/1993). Measurements are compared to model predictions using halfhourlyme&omb@~ and mean deposition velocities computed for a 'wet surface'day. Reference height is 1 m. above the zeroplane. 25 20 -ModdlcdVd MtarmedVd wetdke ---------- 15 10 5 0 WOO 02:OO 04:OO 06:OO 08:OO 1O:OO 1290 1490 1600 18:OO 2000 2200 GMT 14. 34). Measurements are compared to model predictions using half-hourly meteorobgical data and mean deposition velocities computed for a 'wet surface' day.
These will not be discussed in this work. The analysis given in this paper is focused on the Elpseetsche Veld experiments and on SO2 and NO2. Analogous procedures can be applied for other gases or other sites. 2. 1 Instruments and equipment Fig. 1 shows a schematic of one of the systems, when operated during the test period at the heathland Elspeetsche Veld. (Later this system was installed at Speulder forest, where it is still operated nowadays). The low vegetation system is similar, but not identical.
10 The median vd was 13 mm s-l and was quite close to the median V,, of 15 mm s-'. The underlying canopy resistance was therefore very small and averaged just 12 s m-'. The surface was behaving almost as a perfect sink for SO, and while the presence of liquid water did reduce r, as shown in Fig. 9 s m 1the increase in deposition velocity was small (to 15 mm s-l)and was then almost equal to vmu. The very large rates of deposition to base soil were larger than those reported by Garland )1977) and by Payrissat and Beilke (1975).
Acid Rain Research: Do We Have Enough Answers? by J.W. Erisman, G.J. Heij