Spatial variability of snow chemistry in Mt. Komagatake, Japanese Central Alps

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  • TANAKA Motoki
    Department of Environmental Sciences, Faculty of Science, Shinshu University
  • SUZUKI Keisuke
    Department of Environmental Sciences, Faculty of Science, Shinshu University Institute of Mountain Science, Shinshu University

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  • 山岳積雪中の化学成分の空間分布とその成因
  • サンガク セキセツチュウ ノ カガク セイブン ノ クウカン ブンプ ト ソノ セイイン

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Abstract

The spatial variability of the chemical constituents of the snow layers on the east-west ridge in the high mountains of the Japanese Central Alps was examined. A comparison of the nss-SO42- and nss-Ca2+ concentrations in the snow layers on the eastern and western ridges revealed that the chemical concentrations were higher on the western ridge. On the other hand, the NO3-concentration in the snow layers on the eastern ridge was comparable to that on the western one. In addition, the NO3-/nss-SO42- ratio for the snow layers on the eastern ridge was greater than that on the western one. Furthermore, the prevailing westerlies raged at the western and alpine parts of the study area throughout the snowy season. In contrast, the easterlies were predominant in the eastern part of this study area. Therefore, we infer that the snow on the eastern ridge, in comparison to that on the western one, is under relatively greater influence of the local emission of the chemical constituents.

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