Abstract
The atmospheric deposition of air pollutants at a forest edge was studied by means of monitoring canopy throughfall at the edge and at five different parallel lines in the forest behind the edge. The investigation was carried out at a pine forest on the Swedish west coast. Throughfall and bulk deposition samples were analyzed for volume, SO 2−4 , NO −3 , Cl−, NH +4 , Na+, K+, Mg2+, Ca2+, and for pH.
The results show that the throughfall flow at the edge was increased substantially for most ions. The ratios in throughfall flows between the edge and the line 50 m into the forest were for SO 2−4 , 1.5, NO −3 2.9, NH +4 2.7, and Na+ 3.1.
Since this effect is not only valid for forest edges but also for hillsides, hilltops, and edges between stands of different age, etc., there might be substantial areas which get much larger total deposition than the normally considered closed forest.
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Hasselrot, B., Grennfelt, P. Deposition of air pollutants in a wind-exposed forest edge. Water Air Soil Pollut 34, 135–143 (1987). https://doi.org/10.1007/BF00184756
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DOI: https://doi.org/10.1007/BF00184756