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dc.contributor.authorSaltzer, Rebecca L.
dc.contributor.authorvan der Hilst, Robert D
dc.contributor.authorKarason, Hrafnkell
dc.date.accessioned2017-03-27T21:03:43Z
dc.date.available2017-03-27T21:03:43Z
dc.date.issued2001-04
dc.date.submitted2000-09
dc.identifier.issn0094-8276
dc.identifier.urihttp://hdl.handle.net/1721.1/107741
dc.description.abstractFrom the reprocessed data set of Engdahl and co-workers we have carefully selected matching P and S data for tomographic imaging. We assess data and model error and conclude that our S model uncertainty is twice that of the P model. We account for this in our comparison of the perturbations in P and S-wavespeed. In accord with previous studies we find that P and S perturbations are positively correlated at all depths. However, in the deep mantle systematic differences occur between regions that have undergone subduction in the last 120 million years and those that have not. In particular, below 1500 km depth ∂ln V[subscript s]/∂ln V[subscript p] is significantly larger in mantle regions away from subduction than in mantle beneath convergent margins. This inference is substantiated by wavespeed analyses with random realizations of the slab/non-slab distribution. Through much of the mantle there is no significant correlation between bulk sound and S-wave perturbations, but they appear to be negatively correlated between 1700 and 2100 km depth, which is also where the largest differences in ∂ln V[subscript s]/∂ln V[subscript p] occur. This finding supports convection models with compositional heterogeneity in the lowermost mantle.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant EAR-9905779)en_US
dc.language.isoen_US
dc.publisherAmerican Geophysical Union (AGU)en_US
dc.relation.isversionofhttp://dx.doi.org/10.1029/2000GL012339en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceMIT Web Domainen_US
dc.titleComparing P and S wave heterogeneity in the mantleen_US
dc.typeArticleen_US
dc.identifier.citationSaltzer, R. L., R. D. van der Hilst, and H. Kárason. “Comparing P and S Wave Heterogeneity in the Mantle.” Geophysical Research Letters 28.7 (2001): 1335–1338. © 2001 American Geophysical Unionen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorSaltzer, Rebecca L.
dc.contributor.mitauthorvan der Hilst, Robert D
dc.contributor.mitauthorKarason, Hrafnkell
dc.relation.journalGeophysical Research Lettersen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsSaltzer, R. L.; van der Hilst, R. D.; Kárason, H.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0003-1650-6818
mit.licensePUBLISHER_POLICYen_US


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