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The thermal conductivity of Earth's lower mantle


Metadata FieldValueLanguage
dc.contributorJianjun Dong, dongjia@auburn.eduen_US
dc.creatorTang, Xiaoli
dc.creatorNtam, Moses C.
dc.creatorDong, Jianjun
dc.creatorRainey, Emma S. G.
dc.creatorKavner, Abby
dc.date.accessioned2022-09-16T01:48:54Z
dc.date.available2022-09-16T01:48:54Z
dc.date.created2014
dc.identifier10.1002/2014GL059385en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2014GL059385en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50337
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-405
dc.description.abstractWe assess the thermal conductivity of the Earth’s lower mantle anchored on our first-principles calculations of lattice thermal conductivity of MgSiO3 perovskite. Our calculations agree with measurements of iron-free perovskite at ambient conditions and show a lower pressure dependence compared with other recent calculations. In addition, we show that the effect of iron on the lattice thermal conductivity of silicate perovskite is likely to be small at high temperatures. To provide an assessment of thermal conductivity throughout the lower mantle, we reevaluate existing high-pressure optical absorption data to constrain an upper bound radiative contribution to diffusive heat transfer and examine a composite model for combining thermal conductivity of oxide and perovskite phases in the lower mantle. We find that the overall thermal conductivity of the lower mantle is approximately constant between 2.5 and 3.5 W/m/K. These values imply that the mantle has a blanketing effect on heat flow across the core-mantle boundary.en_US
dc.formatPDFen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.ispartofGeophysical Research Lettersen_US
dc.relation.ispartofseries0094-8276en_US
dc.rights©American Geophysical Union 2014. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Tang, X., Ntam, M. C., Dong, J., Rainey, E. S., & Kavner, A. (2014). The thermal conductivity of Earth's lower mantle. Geophysical Research Letters, 41(8), 2746-2752.en_US
dc.titleThe thermal conductivity of Earth's lower mantleen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume41en_US
dc.citation.issue8en_US
dc.citation.spage2746en_US
dc.citation.epage2752en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US

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