Occurrence of Mountain Permafrost in the Poroshiri-dake Region, Hidaka Mountains, Hokkaido: Consideration from Year-round Monitoring of Air and Ground Surface Temperatures.

DOI Web Site 2 Citations 29 References
  • ISHIKAWA Mamoru
    Frontier Observational Research System for Global Change
  • IWASAKI Shogo
    the Japan Society for the Promotion of Science Graduate School of Environmental Earth Science, Hokkaido University
  • SAWAGAKI Takanobu
    Graduate School of Environmental Earth Science, Hokkaido University
  • HIRAKAWA Kazuomi
    Graduate School of Environmental Earth Science, Hokkaido University
  • WATANABE Teiji
    Graduate School of Environmental Earth Science, Hokkaido University

Bibliographic Information

Other Title
  • 北海道日高山脈ポロシリ岳周辺における山岳永久凍土環境　　気温と地表面温度観測からの考察
  • ホッカイドウ ヒダカ サンミャク ポロシリダケ シュウヘン ニ オケル サンガク エイキュウ トウド カンキョウ キオン ト チヒョウメン オンド カンソク カラ ノ コウサツ
  • Consideration from Year-round Monitoring of Air and Ground Surface Temperatures
  • 気温と地表面温度観測からの考察

Search this article

Abstract

Year-round air and ground-surface temperature-monitoring indicated occurrences of mountain permafrost in the Hidaka Mountains, southern Hokkaido. The results of air temperature monitoring indicated that the temperature condition in the summit areas of the Hidaka Mountains is similar to that of the lower marginal limit of the discontinuous permafrost zone. Monitoring of the ground-surface temperatures shows that ground thermal regimes vary spatially with snow cover duration and thicknesses, and surficial materials. The permafrost underlies coarse blocky materials covered with thick seasonal snow cover within the Pleistocene cirques. These conditions suggest that mountain permafrost in the Hidaka Mountains is categorized as Mountain Side Permafrost (MSP), which is found beneath mountain slopes covered with thick seasonal snow cover where the mean annual air temperature is lower 0°C. The major controls on permafrost development and preservation are ground cooling before the onset of snow accumulations and cold air concentration through blocky materials. The presence of funnels emitting warm air throughout winter indicates that the cold air circulation plays an important role in the development and the preservation of MSP.

Journal

Citations (2)*help

See more

References(29)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top