CORE-MANTLE RELATIVE MOTION AND COUPLING
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dc.contributor.author | Vanyo J.P. | |
dc.date.accessioned | 2022-09-24T04:26:13Z | |
dc.date.available | 2022-09-24T04:26:13Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=7563015 | |
dc.identifier.citation | Geophysical Journal International, 2004, 158, 2, 470-478 | |
dc.identifier.issn | 0956-540X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38732 | |
dc.description.abstract | Core motion induced by lunisolar precession of the mantle is analysed and compared with experiments and Earth observations. First-order motion has the core axis lagging the mantle axis in precession by a small angle. This misalignment of the axes results in core-mantle relative velocities and displacements over the core-mantle interface as second-order flow. A third-order flow seen in experiments consists of nested fluid cylinders concentric with the core axis. First-order motion can be compared with westward drift and energy dissipation. Second-order motion can be compared with Earth observations using geomagnetic data, although its complexity may require numerical studies for detailed analysis. A specific lag angle and corresponding surface motions are suggested for comparison with Earth data leading to an apparent need for magnetic coupling between the core and the mantle. | |
dc.subject | CORE ENERGY | |
dc.subject | CORE-MANTLE COUPLING | |
dc.subject | EARTH'S CORE | |
dc.subject | GEODYNAMO | |
dc.subject | PRECESSION | |
dc.title | CORE-MANTLE RELATIVE MOTION AND COUPLING | |
dc.type | Статья |
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