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dc.date.accessioned2018-03-22T16:22:37Z
dc.date.available2018-03-22T16:22:37Z
dc.date.created2017-05-22T11:09:48Z
dc.date.issued2017
dc.identifier.citationSmirnov, Aleksey Kulakov, Evgeniy Foucher, Marine Bristol, Katie . Intrinsic paleointensity bias and the long-term history of the geodynamo. Science Advances. 2017, 3(2)
dc.identifier.urihttp://hdl.handle.net/10852/61269
dc.description.abstractMany geodynamo models predict an inverse relationship between geomagnetic reversal frequency and field strength. However, most of the absolute paleointensity data, obtained predominantly by the Thellier method from bulk volcanic rocks, fail to confirm this relationship. Although low paleointensities are commonly observed during periods of high reversal rate (notably, in the late Jurassic), higher than present-day intensity values are rare during periods of no or few reversals (superchrons). We have identified a fundamental mechanism that results in a pervasive and previously unrecognized low-field bias that affects most paleointensity data in the global database. Our results provide an explanation for the discordance between the experimental data and numerical models, and lend additional support to an inverse relationship between the reversal rate and field strength as a fundamental property of the geodynamo. We demonstrate that the accuracy of future paleointensity analyses can be improved by integration of the Thellier protocol with low-temperature demagnetizations.en_US
dc.languageEN
dc.language.isoenen_US
dc.publisherAmerican Association for the Advancement of Science
dc.rightsAttribution-NonCommercial 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.titleIntrinsic paleointensity bias and the long-term history of the geodynamoen_US
dc.typeJournal articleen_US
dc.creator.authorSmirnov, Aleksey
dc.creator.authorKulakov, Evgeniy
dc.creator.authorFoucher, Marine
dc.creator.authorBristol, Katie
cristin.unitcode185,15,22,40
cristin.unitnameSenter for Jordens utvikling og dynamikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1471274
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Science Advances&rft.volume=3&rft.spage=&rft.date=2017
dc.identifier.jtitleScience Advances
dc.identifier.volume3
dc.identifier.issue2
dc.identifier.pagecount7
dc.identifier.doihttp://dx.doi.org/10.1126/sciadv.1602306
dc.identifier.urnURN:NBN:no-63895
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn2375-2548
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/61269/1/e1602306.full.pdf
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/61269/2/1602306_SM.pdf
dc.type.versionPublishedVersion
cristin.articleide1602306
dc.relation.projectNFR/223272


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