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dc.date.accessioned2018-07-02T11:42:32Z
dc.date.available2018-07-02T11:42:32Z
dc.date.created2017-07-05T10:50:00Z
dc.date.issued2017
dc.identifier.citationSteinberger, Bernhard Seidel, Miriam-Lisanne Torsvik, Trond Helge . Limited true polar wander as evidence that Earth's nonhydrostatic shape is persistently triaxial. Geophysical Research Letters. 2017, 44(2), 827-834
dc.identifier.urihttp://hdl.handle.net/10852/61990
dc.description.abstractEarth’s spin axis follows the maximum moment of inertia axis of mantle convection, with some delay due to adjustment of the rotational bulge. Here we compute this axis for geodynamic models based on subduction history, assuming constant slab sinking speed, with another contribution due to thermochemical piles. For a wide range of parameters, a large shift of ≈90∘ is predicted around 80–90 Ma. It can be largely attributed to a change in circum-Pacific subduction from predominantly in the North and South toward East and West. Actual amounts of true polar wander are much smaller, pointing toward additional inertia tensor contributions, possibly due to slabs in the lowermost mantle below both polar regions. These slabs would have been subducted before ≈150 Ma, when plate motions in the Panthalassa basin are largely unknown. Matching predicted and observed true polar wander can serve at constraining such plate motions. This research was originally published in Geophysical Research Letters. © 2017 American Geophysical Unionen_US
dc.languageEN
dc.publisherAmerican Geophysical Union
dc.titleLimited true polar wander as evidence that Earth's nonhydrostatic shape is persistently triaxialen_US
dc.typeJournal articleen_US
dc.creator.authorSteinberger, Bernhard
dc.creator.authorSeidel, Miriam-Lisanne
dc.creator.authorTorsvik, Trond Helge
cristin.unitcode185,15,22,40
cristin.unitnameSenter for Jordens utvikling og dynamikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin1480918
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical Research Letters&rft.volume=44&rft.spage=827&rft.date=2017
dc.identifier.jtitleGeophysical Research Letters
dc.identifier.volume44
dc.identifier.issue2
dc.identifier.startpage827
dc.identifier.endpage834
dc.identifier.doihttp://dx.doi.org/10.1002/2016GL071937
dc.identifier.urnURN:NBN:no-64588
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0094-8276
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/61990/1/grl55438.pdf
dc.type.versionPublishedVersion


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