On the stability of the d'layer

David E. Loper, Ibrahim A. Eltayeb

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The steady solution for the flow in the D” layer given by Stacey and Loper (1983) is generalized and placed on a firmer mathematical foundation. The stability of this flow is then analyzed and a stability criterion is developed. It is found that the stability of the flow is consistent with a lower-mantle viscosity of 0.5-1.0 loz3 Pas and a temperature jump of 706800K across the layer, but if the viscosity is only 3-5 lo2’ Pas, stability of the flow requires a much lower temperature jump. If the higher value of viscosity is correct and the flow is believed to be close to marginally stable, this argues against a second thermal boundary layer occurring elsewhere in the mantle.

Original languageEnglish
Pages (from-to)229-255
Number of pages27
JournalGeophysical and Astrophysical Fluid Dynamics
Volume36
Issue number3-4
DOIs
Publication statusPublished - 1986

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Computational Mechanics
  • Astronomy and Astrophysics
  • Mechanics of Materials

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