Transdimensional Bayesian Attenuation Tomography of the Upper Inner Core

Tanja Pejić; Rhys Hawkins; Malcolm Sambridge; Hrvoje Tkalčić

doi:10.1029/2018JB016400

Transdimensional Bayesian Attenuation Tomography of the Upper Inner Core

Tanja Pejić^*, Rhys Hawkins, Malcolm Sambridge, Hrvoje Tkalčić

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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 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.

Original language	English
Pages (from-to)	1929-1943
Number of pages	15
Journal	Journal of Geophysical Research: Solid Earth
Volume	124
Issue number	2
DOIs	https://doi.org/10.1029/2018JB016400
Publication status	Published - Feb 2019

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10.1029/2018JB016400

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@article{1a795f82e7f34c0b83420baec1ec2717,

title = "Transdimensional Bayesian Attenuation Tomography of the Upper Inner Core",

abstract = " Following the linearized attenuation tomography from our previous study (Peji{\'c} 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.",

keywords = "attenuation, inner core, inverse theory, tomography",

author = "Tanja Peji{\'c} and Rhys Hawkins and Malcolm Sambridge and Hrvoje Tkal{\v c}i{\'c}",

year = "2019",

month = feb,

doi = "10.1029/2018JB016400",

language = "English",

volume = "124",

pages = "1929--1943",

journal = "Journal of Geophysical Research: Solid Earth",

issn = "2169-9313",

publisher = "John Wiley and Sons Inc.",

number = "2",

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TY - JOUR

T1 - Transdimensional Bayesian Attenuation Tomography of the Upper Inner Core

AU - Pejić, Tanja

AU - Hawkins, Rhys

AU - Sambridge, Malcolm

AU - Tkalčić, Hrvoje

PY - 2019/2

Y1 - 2019/2

N2 - 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 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.

AB - 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 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.

KW - attenuation

KW - inner core

KW - inverse theory

KW - tomography

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U2 - 10.1029/2018JB016400

DO - 10.1029/2018JB016400

M3 - Article

SN - 2169-9313

VL - 124

SP - 1929

EP - 1943

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

IS - 2

ER -

Transdimensional Bayesian Attenuation Tomography of the Upper Inner Core

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