| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
A series of numerical experiments had been carried out in order to obtain a comprehensive understanding of mantle dynamics of terrestrial planets with various sizes and mean compositions. The effect of adiabatic compression turned out to be significant on the mantle dynamics of terrestrial planets whose mass is more than four times the Earth's. In addition, a structure called "deep stratosphere" of stable thermal stratification can be formed at the lowermost part of the mantle of massive planets with 10 times the mass of the Earth's owing to the interaction between the adiabatic compression and spatial variations in physical properties (such as viscosity and thermal conductivity), although the strength of the effect of adiabatic compression varies depending on the spherical geometry of the convection vessel of mantle.
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