Fluctuation of δ^<18>O of surface snow with surface hoar and depth hoar formation under radiative cooling

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δ^<18>O and major ions of the snow surface layer were measured during hoarfrost formation. In the nighttime, δ^<18>O decreased when surface hoar and depth hoar crystals formed above and beneath the snow surface, respectively, while δ^<18>O increased due to evaporation in the daytime. These results suggested that H_2^<16>O was enriched by condensation of the hoar crystals, whereas H_2^<18>O was concentrated on the snow surface by the evaporation of light H_2O to the atmosphere. Concentrations of major ions were observed to change as well according to condensation and evaporation of water vapor. δ^<18>O of hoar crystals condensed on March 5 to 6 was estimated to be approximately 5‰ lower than that of the original surface layer.

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詳細情報 詳細情報について

  • CRID
    1570854176934043136
  • NII論文ID
    110001030912
  • NII書誌ID
    AA10756213
  • ISSN
    09142037
  • 本文言語コード
    en
  • データソース種別
    • CiNii Articles

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