Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9995
DC FieldValueLanguage
dc.contributor.authorallSoldati, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallBoschi, L.; CNRS, Institut des Sciences de la Terre Paris (iSTeP), Paris, Franceen
dc.contributor.authorallDella Mora, S.; Institute of Geophysics, Department of Earth Sciences, ETH Zürich, Switzerlanden
dc.contributor.authorallForte, A.; GEOTOP, Université du Québec à Montréal, Canadaen
dc.date.accessioned2015-06-16T12:10:00Zen
dc.date.available2015-06-16T12:10:00Zen
dc.date.issued2014en
dc.identifier.urihttp://hdl.handle.net/2122/9995en
dc.description.abstractWe conduct joint tomographic inversions of P and S travel time observations to obtain models of dyP and dyS in the entire mantle. We adopt a recently published method which takes into account the geodynamic coupling between mantle heterogeneity and core-mantle boundary (CMB) topography by viscous flow, where sensitivity of the seismic travel times to the CMB is accounted for implicitly in the inversion (i.e. the CMB topography is not explicitly inverted for). The seismic maps of the Earth's mantle and CMB topography that we derive can explain the inverted seismic data while being physically consistent with each other. The approach involved scaling P-wave velocity (more sensitive to the CMB) to density anomalies, in the assumption that mantle heterogeneity has a purely thermal origin, so that velocity and density heterogeneity are proportional to one another. On the other hand, it has sometimes been suggested that S-wave velocity might be more directly sensitive to temperature, while P heterogeneity is more strongly influenced by chemical composition. In the present study, we use only S-, and not P-velocity, to estimate density heterogeneity through linear scaling, and hence the sensitivity of core-reflected P phases to mantle structure. Regardless of whether density is more closely related to P- or S-velocity, we think it is worthwhile to explore both scaling approaches in our efforts to explain seismic data. The similarity of the results presented in this study to those obtained by scaling P-velocity to density suggests that compositional anomaly has a limited impact on viscous flow in the deep mantle.en
dc.language.isoEnglishen
dc.relation.ispartofANNALS OF GEOPHYSICSen
dc.relation.ispartofseries/57(2014)en
dc.subjectSeismic tomographyen
dc.titleTomography of core-mantle boundary and lowermost mantle coupled by geodynamics: joint models of shear and compressional velocityen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberS0652en
dc.subject.INGV04. Solid Earth::04.01. Earth Interior::04.01.03. Mantle and Core dynamicsen
dc.identifier.doi10.4401/ag-6603en
dc.description.obiettivoSpecifico1T. Geodinamica e interno della Terraen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.contributor.authorSoldati, G.en
dc.contributor.authorBoschi, L.en
dc.contributor.authorDella Mora, S.en
dc.contributor.authorForte, A.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentCNRS, Institut des Sciences de la Terre Paris (iSTeP), Paris, Franceen
dc.contributor.departmentInstitute of Geophysics, Department of Earth Sciences, ETH Zürich, Switzerlanden
dc.contributor.departmentGEOTOP, Université du Québec à Montréal, Canadaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptUniversità degli Studi di Padova-
crisitem.author.deptInstitute of Geophysics, Department of Earth Sciences, ETH Zürich, Switzerland-
crisitem.author.deptGEOTOP, Université du Québec à Montréal, Canada-
crisitem.author.orcid0000-0002-9048-201X-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
Appears in Collections:Article published / in press
Files in This Item:
File Description SizeFormat Existing users please Login
2014 soldati et al ANNALS (tomoPS).pdfMain article1.78 MBAdobe PDF
Show simple item record

WEB OF SCIENCETM
Citations

1
checked on Feb 10, 2021

Page view(s) 20

341
checked on Mar 27, 2024

Download(s) 50

81
checked on Mar 27, 2024

Google ScholarTM

Check

Altmetric