Abstract. True Polar Wander (TPW), the global motion of the Earth's mantle relative to the axis of rotation, is considered for its impact on the degree 2 surface dynamic topography induced by mass anomalies in a viscously stratified mantle. These sources, responsible for a geoid and topographic signal at the Earth's surface, mimic the effects of subductions and other thermal instabilities on long-term Earth's rotation. A rotating, viscous planet has the ability to displace the axis of rotation with respect to internal mass anomalies in order to ...
True polar wander affects the Earth dynamic topography and favours a highly viscous lower mantle
SPADA, GIORGIO;
1994
Abstract
Abstract. True Polar Wander (TPW), the global motion of the Earth's mantle relative to the axis of rotation, is considered for its impact on the degree 2 surface dynamic topography induced by mass anomalies in a viscously stratified mantle. These sources, responsible for a geoid and topographic signal at the Earth's surface, mimic the effects of subductions and other thermal instabilities on long-term Earth's rotation. A rotating, viscous planet has the ability to displace the axis of rotation with respect to internal mass anomalies in order to ...File in questo prodotto:
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