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Detailed Reference Information |
Le Mouël, J.L., Narteau, C., Greff-Lefftz, M. and Holschneider, M. (2006). Dissipation at the core-mantle boundary on a small-scale topography. Journal of Geophysical Research 111. doi: 10.1029/2005JB003846. issn: 0148-0227. |
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The parameters of the nutations are now known with a good accuracy, and the theory accounts for most of their values. Dissipative friction at the core-mantle boundary (CMB) and at the inner core boundary is an important ingredient of the theory. Up to now, viscous coupling at a smooth interface and electromagnetic coupling have been considered. In some cases they appear hardly strong enough to account for the observations. We advocate here that the CMB has a small-scale roughness and estimate the dissipation resulting from the interaction of the fluid core motion with this topography. We conclude that it might be significant. |
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Abstract |
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Keywords
Geodesy and Gravity, Earth rotation variations, Geomagnetism and Paleomagnetism, Core processes (1213, 8115), Planetary Sciences, Fluid Planets, Orbital and rotational dynamics, Planetary Sciences, Fluid Planets, Tidal forces |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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