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Detailed Reference Information |
Ten, A., Yuen, D.A., Larsen, T.B. and Malevsky, A.V. (1996). The evolution of material surfaces in convection with variable viscosity as monitored by a characteristics-based method. Geophysical Research Letters 23: doi: 10.1029/96GL02182. issn: 0094-8276. |
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We have studied the evolution of material surfaces in strongly time-dependent convection for both Newtonian and non-Newtonian temperature- and depth-dependent rheologies. A spline-characteristic method has been employed. The method of characteristics is second-order in time and fourth-order in space. Our strategy is to employ a very dense grid for the material surface field with about 50 to 100 times more points than for the temperature field grid. We have detected sharp entrainment of the surrounding material into both the ascending and descending flow structures. We have observed the breakoff process involving the descending plume. Mixing takes place very differently for the two rheologies. With time, small vortical features are developed inside the Newtonian plumes, while unmixed islands still persist in the non-Newtonian flow. ¿ American Geophysical Union 1996 |
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Abstract |
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Keywords
Geochemistry, Composition of the core, Geochemistry, Composition of the mantle, Mineralogy and Petrology, Experimental mineralogy and petrology, Mineral Physics, High-pressure behavior |
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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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