Abstract
This paper presents initial results of a joint Finnish-Russian investigation (1991–1996) of air pollutant deposition in Scots pine (Pinus sylvestris Linné) stands of Karelian Isthmus (north-western Leningrad Region, Russia) and south-eastern Finland. Bulk precipitation and canopy throughfall analyses revealed relatively high sulphur and nitrogen loads in the Karelian Isthmus and in the southern part of south-eastern Finland. The deposition load decreased gradually northwards, the highest levels of S and N deposition in the vicinity of St. Petersburg being two to three times higher than the values considered to be background level in Finland. Besides the acidifying elements, a high calcium deposition was detected in the Karelian Isthmus and in the southern part of south-eastern Finland. The high load of calcium, which probably emanates from oil shale burning in NE Estonia, alleviates the acidifying effect of sulphur and nitrogen deposition.
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Lummel, I., Arkhipov, V. Atmospheric deposition of sulphur, nitrogen and base cations in Scots pine stands of south-eastern Finland and the Karelian Isthmus, NW Russia in 1992. Hydrobiologia 322, 223–226 (1996). https://doi.org/10.1007/BF00031831
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DOI: https://doi.org/10.1007/BF00031831