Planetary reorientation

Isamu M Matsuyama, Francis Nimmo, Jerry X. Mitrovica

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Planetary bodies can undergo reorientation due to mass redistribution associated with internal or external processes such as convection or impacts. Mass redistribution produces perturbations to the inertia tensor, and the planet must reorient to adjust to the new orientation of the maximum principal axis. The amount of reorientation depends on the competing sizes of the applied load and the remnant bulge. For tidally deformed satellites in synchronous rotation, the slow rotation and correspondingly small remnant bulge makes them prone to reorientation. Reorientation can generate gravity and topography perturbations and large tectonic stresses. Observational constraints based on gravity, tectonic, and paleomagnetic data suggest that many Solar System bodies appear to have undergone significant reorientation.

Original languageEnglish (US)
Pages (from-to)605-634
Number of pages30
JournalAnnual Review of Earth and Planetary Sciences
Volume42
DOIs
StatePublished - 2014

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retraining
perturbation
gravity
tectonics
inertia
solar system
planet
convection
topography
gravitation
planets
tensors

Keywords

  • Polar wander
  • Remnant bulge
  • Rotational stability

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Planetary reorientation. / Matsuyama, Isamu M; Nimmo, Francis; Mitrovica, Jerry X.

In: Annual Review of Earth and Planetary Sciences, Vol. 42, 2014, p. 605-634.

Research output: Contribution to journalArticle

Matsuyama, Isamu M ; Nimmo, Francis ; Mitrovica, Jerry X. / Planetary reorientation. In: Annual Review of Earth and Planetary Sciences. 2014 ; Vol. 42. pp. 605-634.
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