奥羽山地北部ざる森山の雪田土壌にみられる中世温暖期の雪渓の縮小　第１報　雪田中の埋没泥炭層の分布と年代および形成環境

DOI Web Site 被引用文献2件 参考文献34件

書誌事項

タイトル別名
  • Evidence for snow patch shrinkage in the Medival Warm Period, on Mt.Zarumori, Oou Mountains, northeastern Japan. Part 1: Age, distribution and depositional environment of the buried peat layers.
  • オウウ サンチ ホクブ ザルモリヤマ ノ セツデン ドジョウ ニ ミラレル チ
  • Part 1 : Age, distribution and depositional environment of the buried peat layers
  • 第1報雪田中の埋没泥炭層の分布と年代および形成環境

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抄録

This study shows the use of subalpine meadow soil stratigraphy to establish the time of disappearance of past snow patches. Growth periods of plants are too short in places where the snow disappears late in the season, such as at the centers of snow patches. Therefore, plant growth and the subsequent increase of organic content in the soil will indicate the disappearance of snow patches in early summer. Key tephras indicated that a series of buried peat layers on Mt. Zarumori in northeastern Japan accumulated after ca. 1200 yBP, and were buried after 915 AD, showing that the organic content in the surface soil increased ca. 1000yBP. The increase in carbon content probably indicates an increase in litter and stable surface condition. This was likely due to an early snow disappearance and longer snow-free period during the Medieval Warm Period. Snow disappearance before mid July is needed for the formation of buried peat, thus the buried peat layers on Mt. Zarumori probably indicate that the size of summer snow patch in 1000 yBP was smaller than those of recent snow patches.

収録刊行物

  • 雪氷

    雪氷 59 (2), 101-110, 1997

    公益社団法人 日本雪氷学会

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