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Transdimensional Bayesian Attenuation Tomography of the Upper Inner Core

Pejic, Tanja; Hawkins, Rhys; Sambridge, Malcolm; Tkalčić, Hrvoje

Description

Following the linearized attenuation tomography from our previous study (Pejić et al., 2017, https://doi.org/10.1002/2016JB013692), we perform hierarchical transdimensional Bayesian tomography of the upper ≈400 km of the inner core, using 398 globally distributed t∗ estimates. The results are in good agreement with the ones obtained through linearized tomography: they show more complex attenuation pattern than the purely hemispherical one, and the noise estimated from the hierarchical inversion...[Show more]

dc.contributor.authorPejic, Tanja
dc.contributor.authorHawkins, Rhys
dc.contributor.authorSambridge, Malcolm
dc.contributor.authorTkalčić, Hrvoje
dc.date.accessioned2020-05-04T04:35:05Z
dc.date.available2020-05-04T04:35:05Z
dc.identifier.issn2169-9356
dc.identifier.urihttp://hdl.handle.net/1885/203607
dc.description.abstractFollowing the linearized attenuation tomography from our previous study (Pejić et al., 2017, https://doi.org/10.1002/2016JB013692), we perform hierarchical transdimensional Bayesian tomography of the upper ≈400 km of the inner core, using 398 globally distributed t∗ estimates. The results are in good agreement with the ones obtained through linearized tomography: they show more complex attenuation pattern than the purely hemispherical one, and the noise estimated from the hierarchical inversion is in good agreement with estimates obtained from the Discrepancy Principle in the previous study. The attenuation pattern we observe gives more weight to the geodynamical models that couple the thermal anomalies of the lowermost mantle to the inner core boundary.
dc.description.sponsorshipPejic and Hawkins thank the Australian National University for IPRS and APA scholarships that made this research possible.
dc.format.extent15 pages
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Geophysical Union (AGU)
dc.rights© 2019. American Geophysical Union. http://publications.agu.org/author-resource-center/usage-permissions/ Pejic, T., Hawkins, R., Sambridge, M., & Tkalciˇ c, H. ´ (2019). Transdimensional Bayesian attenuation tomography of the upper inner core. Journal of Geophysical Research: Solid Earth, 124, 1929–1943. https://doi.org/10.1029/2018JB016400. Not subject to U.S. copyright (Publisher journal website as of 4/5/2020)
dc.sourceJournal of Geophysical Research: Solid Earth
dc.titleTransdimensional Bayesian Attenuation Tomography of the Upper Inner Core
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume124
dcterms.dateAccepted2019-02-06
dc.date.issued2019-02-16
local.identifier.absfor040499 - Geophysics not elsewhere classified
local.identifier.ariespublicationu5786633xPUB704
local.publisher.urlhttps://www.agu.org/
local.type.statusPublished Version
local.contributor.affiliationPejic, Tanja, College of Science, The Australian National University
local.contributor.affiliationHawkins, Rhys, College of Science, The Australian National University
local.contributor.affiliationSambridge, Malcolm, College of Science, The Australian National University
local.contributor.affiliationTkalcic, Hrvoje, College of Science, The Australian National University
local.identifier.essn2169-9313
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage1929
local.bibliographicCitation.lastpage1943
local.identifier.doi10.1029/2018JB016400
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
dc.date.updated2019-11-25T08:02:39Z
local.identifier.scopusID2-s2.0-85061615163
dcterms.accessRightsOpen Access
dc.provenancehttp://sherpa.ac.uk/romeo/issn/2169-9356/ Author can archive publisher's version/PDF. Publisher's version/PDF may be used 6 months after publication on an Institutional Repository or Governmental Repository only (Sherpa/Romeo as of 4/5/2020)
CollectionsANU Research Publications

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