2014 Fiscal Year Final Research Report
Heterogeneity at the bottom of the mantle and geomagnetic non-dipole field
| Project/Area Number |
23540491
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Keywords | 地磁気 / 核ーマントル境界 / 電気伝導度 |
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| Outline of Final Research Achievements |
In case that the heterogeneous mantle electrical conductivity and simple magnetic field at the core-mantle boundary are the cause of the vertical magnetic field component at the equatorial region, it is essential for the simple magnetic field to contain the toroidal magnetic field component. The heterogeneous mantle converts the toroidal magnetic field at the core-mantle boundary to an observable magnetic field at the Earth’s surface. Detection of the magnetic field and accompanying electric field variation enables us to constrain the electrical conductivity of the heterogeneous block at the bottom of the mantle.
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| Free Research Field |
地球電磁気学
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