| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
We started a research project to understand permafrost on Mt. Fuji (3776 m asl.) in warm humid maritime Japan to monitor its change and to evaluate the impact from changes of climate and volcanic activity. From 2012, permafrost temperatures in two deep boreholes were successfully monitored until 2014. According to the measured relationships between the surface temperatures and altitudes both on the north- and south-facing slopes, the monitored ground surface temperatures were spatially extrapolated for whole area of Mt. Fuji using a GIS software. The potential lower boundary of permafrost lies at 3050-3150 m asl. on the north-facing slope and at 3450-3600 m asl. on the south-facing. Contrary to the assumption of the previous studies, permafrost absence was confirmed in another two shallow boreholes near the summit, where the highly permeable debris allows heat transportation by rain-water infiltration. This indicates quite irregular permafrost distribution on Mt. Fuji.
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