| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Outline of Final Research Achievements |
We have developed a deep-sea long-baseline electric field observation system that can be deployed and recovered by a manned submersible with relatively simple operations, with the purpose to increase opportunities for electromagnetic exploration of the mantle transition zone in the oceanic area using the system. We have developed methods that uses the solar quiet daily variations and electromagnetic field induced by ocean tides, which are usually removed as noise in electromagnetic surveys of the upper mantle, as sources of electromagnetic induction in the mantle. Factors that determine the mathematical and physical validity of the electromagnetic response function are clarified, and this made it possible to distinguish the influence of multiple sources of magnetic field variation that contaminate the electromagnetic response function.
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