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Zonal flow formation in the Earth’s core

Author

Listed:
  • Takehiro Miyagoshi

    (Japan Agency for Marine-Earth Science and Technology, Yokohama, 236-0001, Japan)

  • Akira Kageyama

    (Graduate School of Engineering, Kobe University)

  • Tetsuya Sato

    (University of Hyogo)

Abstract

Zonal flow in Earth's core As zonal flows are common in turbulent convection regimes, such as in the atmospheres of giant planets and the Earth's oceans, they might also be present in the Earth's outer core, which is thought to be in a turbulent state. Takehiro Miyagoshi and colleagues have investigated numerical simulations of the Earth's geodynamo with lower viscosities than most previous simulations have been able to use, and have identified a new convection regime of core flow that exhibits a dual structure — inner sheet-like radial plumes, surrounded by westward cylindrical zonal flow. Thus convection in the Earth's outer core may therefore resemble that seen in planetary atmospheres and oceans more closely than was expected.

Suggested Citation

  • Takehiro Miyagoshi & Akira Kageyama & Tetsuya Sato, 2010. "Zonal flow formation in the Earth’s core," Nature, Nature, vol. 463(7282), pages 793-796, February.
    • Handle: RePEc:nat:nature:v:463:y:2010:i:7282:d:10.1038_nature08754
    DOI: 10.1038/nature08754
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