The anisotropy of local turbulence in Earth's core
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- Matsushima Masaki
- Institute of Geophysics and Planetary Physics, University of California Department of Earth and Planetary Sciences, Tokyo Institute of Technology
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- Nakajima Takahiro
- Institute of Geophysics and Planetary Physics, University of California Tono Geoscience Center, Japan Nuclear Cycle Development Institute
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- Roberts Paul H.
- Institute of Geophysics and Planetary Physics, University of California
書誌事項
- タイトル別名
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- The anisotropy of local turbulence in the Earth's core
- anisotropy of local turbulence in Earths core
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The anisotropy of local turbulence in the Earth's core is examined. It is recognized that small-scale motions in the core are strongly influenced by the Earth's rotation and its magnetic field. A small region of the core is simulated (the computational box), across which the prevailing large-scale (toroidal) magnetic field is supposed to be uniform and in which the temperature or compositional gradient providing the buoyancy that powers the turbulence is parallel to the (uniform) gravitational field. The simulations are used to estimate the turbulent fluxes of mean fields and their dependence on the latitude at which the computational box is situated. It is found that the effect of local turbulence on the diffusion of large-scale fields is significant, and that turbulent transport is anisotropic. It is believed that the results of the present study will prove useful in determining geophysically realistic diffusivities for use in future global geodynamo simulations.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 51 (4), 277-286, 1999
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681487357952
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- NII論文ID
- 10003737701
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 4726169
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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