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Model computations on the effect of rising temperature on soil moisture and water availability in forest ecosystems dominated by scots pine in the boreal zone in Finland

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Abstract

Based on model calculations, the moisture of soil for sites with and without a cover of trees under the current and rising temperature was studied assuming a 5 °C increase in annual mean temperature over a period of 100 years. The calculation for southern Finland (61°N) showed that the soil moisture under elevated temperature could be reduced compared to that under current temperature conditions. This was also true for northern Finland (66°N), but there the reduction in soil moisture was less substantial. In particular, when trees were present, the soil moisture during the growing season was reduced due to enhanced evapotranspiration. In the presence of trees, the moisture content of the surface soil was only half that under the current temperature. In these conditions, reduced accumulation of snow and a thin humus layer allowed the soil to freeze to deep layers, thereby causing further reduction in soil moisture due to poor transfer of water deeper in the soil.

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Authors and Affiliations

  1. University of Joensuu, Faculty of Forestry, P.O. Box 111, FIN-80101, Joensuu, Finland

    Seppo Kellomäki & Hannu Väisänen

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  1. Seppo Kellomäki
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  2. Hannu Väisänen
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Kellomäki, S., Väisänen, H. Model computations on the effect of rising temperature on soil moisture and water availability in forest ecosystems dominated by scots pine in the boreal zone in Finland. Climatic Change 32, 423–445 (1996). https://doi.org/10.1007/BF00140355

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  • DOI: https://doi.org/10.1007/BF00140355

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