Dynamical influences from thermal‐chemical instabilities at the core‐mantle boundary

Ulrich Hansen, David A. Yuen

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Two‐dimensional, time‐dependent calculations show that the thermal and flow structures can be influenced by the lower‐mantle thermal‐chemical instabilities. The style of the core‐mantle boundary (CMB) deformation in thermal‐chemical convection is different from that obtained in thermal convection. The amplitude of CMB hills is reduced greatly from the depth‐dependence of thermal expansivity, found in recent high‐pressure experiments.

Original languageEnglish (US)
Pages (from-to)629-632
Number of pages4
JournalGeophysical Research Letters
Volume16
Issue number7
DOIs
StatePublished - Jul 1989

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