Japan Geoscience Union Meeting 2025

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[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS12] Mountain Science

Thu. May 29, 2025 9:00 AM - 10:30 AM 102 (International Conference Hall, Makuhari Messe)

convener:Akihiko SASAKI(Department of Geography and Environmental Studies, Kokushikan University), Motoshi Nishimura(Interdisciplinary Cluster for Cutting Edge Research, Institute for Mountain Science, Shinshu University), Asaka Konno(Tokoha University), Chairperson:Akihiko SASAKI(Department of Geography and Environmental Studies, Kokushikan University), Takushi KOYAMA(Faculty of Letters,Kokushikan University)

9:45 AM - 10:00 AM

[MIS12-04] Effects of freeze-thaw action in the Hakuba mountain range

*Hirotaka Sugiyama1, Chiyuki Narama1 (1.Niigata University)


Keywords:Rock temperature, Seasonal freeze-thaw, FCW, Snowy cold region

We investigated rock temperature and snow accumulation in the Hakuba Mountains (about 3,000 m a.s.l.) in the northern Japanese Alps over a three-year period from 2021 to 2024. Our analysis focused on examining changes in FI and FCW duration with variations in snow depth. At sites with lower winter surface temperatures and higher FI, the time below the lower limit of FCW ( -8°C) tended to be longer, and the FCW recording time tended to be shorter. However, some sites recorded long FCW despite large FI. Such locations included cliffs at the top of flat slopes covered by thick snow in the latter half of the winter season or under cornice near mountain peaks, where temperatures were low in the first half of the winter season and did not rise easily in the latter half.