Monitoring of 3m-profiles of ground temperature on the summit area of Mt. Fuji (2008-2010): Toward elucidation of permafrost occurrence and its long-term change

• IWAHANA Go

  Faculty of Environmental Earth Science, Hokkaido University,

• IKEDA Atsushi

  Institute of Mountain Science, Shinshu University,

• FUKUI Kotaro

  Tateyama Caldera Sabo Museum,

• SAITO Kazuyuki

  Japan Agency for Marine-Earth Science and Technology,

• SUEYOSHI Tetsuo

  Japan Agency for Marine-Earth Science and Technology,

• HARADA Koichiro

  School of Food, Agricultural and Environmental Sciences, Miyagi University,

• SAWADA Yuki

  Geological Museum, Geological Survey of Japan, AIST,

Bibliographic Information

Other Title

• 富士山頂における3m深地温測定（2008-2010年） ―永久凍土の存在確認と長期変化把握に向けて―
• 富士山頂における3m深地温測定(2008年-2010年)--永久凍土の存在確認と長期変化把握に向けて
• フジ サンチョウ ニ オケル 3mシンチオン ソクテイ 2008ネン 2010ネン エイキュウ トウド ノ ソンザイ カクニン ト チョウキ ヘンカ ハアク ニ ムケテ

Abstract

The occurrence of permafrost was reported on the summit of Mt. Fuji in the early 1970s. In view of recent climate change, public attention has been given to possible changes in surface and underground conditions, including permafrost, on Mt. Fuji. Over two years beginning in 2008, we monitored two ground temperature profiles down to 3m on the summit of Mt. Fuji, and we have not confirmed the occurrence of permafrost. At one site, we observed seasonal frost reaching more than 3m deep. However, heavy rain events every summer triggered large increases in ground temperature, and heavy rains during the autumn rainy season rapidly thawed the frozen layer deeper than 2-3m. At the other site, the insulating effect of snow cover weakened frost penetration into the ground, and heating by rain infiltration kept ground temperature relatively high throughout the monitored period. Our investigation suggests that the ground temperature regime varies greatly over years, and the thermal status of frozen ground is unstable on the summit of Mt. Fuji. It is difficult to evaluate the influence of recent climate change on the underground condition on the summit of Mt. Fuji using information available at this moment. Evaluation of long-term changes in the ground temperature regime and the status of frozen ground should be based on multipoint and long-term monitoring of the ground to a deeper extent, together with surface micrometeorological observations.

Journal

• Journal of the Japanese Society of Snow and Ice

  Journal of the Japanese Society of Snow and Ice 73 (2), 119-131, 2011

  The Japanese Society of Snow and Ice

Keywords

• Mt. Fuji
• Permafrost
• Monitoring
• Rain infiltration
• Ground temperature

Details

• CRID: 1390574411905419904
• NII Article ID: 10028197114
• NII Book ID: AN00131221
• DOI: 10.5331/seppyo.73.2_119
• ISSN: 18836267
• ISSN: 03731006
• NDL BIB ID: 11049497
• Web Site: http://id.ndl.go.jp/bib/11049497
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11049497
• Web Site: https://www.jstage.jst.go.jp/article/seppyo/73/2/73_119/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed