| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
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| Outline of Final Research Achievements |
Interferometric SAR (InSAR) analysis using ALOS2 (L-band) and Sentinel-1 (C-band) data was conducted for four areas in Japan and overseas where permafrost is distributed, and the temporal and spatial changes in land surface displacement due to warming and surface disturbance were quantified with field observations. The spatial distribution of the displacement in accordance with the frozen ground dynamics at a resolution of several tens of meters depending on the spatial resolution of the SAR image was confirmed to be consistent with the results of the field survey and the physical processes in the frozen ground area. This is the first field verification of InSAR analysis for permafrost. L-band interferometry, which is less affected by snow cover and vegetation layers, was found to be superior to C-band interferometry in permafrost areas.
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