Critical loads of acid deposition for forest ecosystems in the Kola Peninsula |
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| Authors: | G Koptsik S Koptsik |
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| Institution: | 1. Faculty of Soil Science, Moscow State University, 119899, Moscow, Russia
2. Faculty of Physics, Moscow State University, 119899, Moscow, Russia
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| Abstract: | We assessed critical loads of acid deposition and their exceedance for soils in the Kola Peninsula using a simple balance method and mapped them within 1.0° × 0.5° longitude/latitude grid cells. Critical loads of acidity vary from 200 to 800 molc/ha/y with the type of soil, parent rock, vegetation and climatic conditions. The critical deposition values are dominated by S contribution. Present sulphur depositions are higher than critical values in the large part of the Kola Peninsula (about 40% of total area). The greatest excess (800–1200 molc/ha/y) occur in north-western and western parts, especially in surroundings of nickel smelter in Nickel. Terrestrial ecosystems in the north-western Kola Peninsula are particularly susceptible to acid deposition damage due to relatively high soil sensitivity and heavy sulphur deposition. |
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