Passive Adjoint Tomography of the Crustal and Upper Mantle Beneath Eastern Tibet With a W2‐Norm Misfit Function

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dc.citation.firstpage12986en_US
dc.citation.issueNumber22en_US
dc.citation.journalTitleGeophysical Research Lettersen_US
dc.citation.lastpage12995en_US
dc.citation.volumeNumber46en_US
dc.contributor.authorDong, Xingpengen_US
dc.contributor.authorYang, Dinghuien_US
dc.contributor.authorNiu, Fenglinen_US
dc.date.accessioned2020-02-14T16:39:35Zen_US
dc.date.available2020-02-14T16:39:35Zen_US
dc.date.issued2019en_US
dc.description.abstractFull waveform tomography is an effective method to obtain high‐resolution subsurface velocity structures. It is, however, difficult for the conventional L2‐norm‐based inversion to reach the global minimum because of cycle‐skipping problem. In this study, we investigated the feasibility of using the quadratic Wasserstein metric distance (W2 norm) as the misfit function for passive adjoint tomography. We first derived equations of the Fréchet gradient and adjoint source under W2‐norm misfit function. We then conducted numerical experiments to illustrate the effectiveness of the proposed method in avoiding cycle skipping. We finally applied the adjoint tomography to eastern Tibet and obtained a 3‐D velocity model of the lithosphere. The adjoint tomography revealed two low‐velocity channels beneath the NE and SE margins of the Tibetan plateau, which were also observed by previous studies. Our results are consistent with the lower crust flow model that was proposed to explain the deformation occurring at the two margins.en_US
dc.identifier.citationDong, Xingpeng, Yang, Dinghui and Niu, Fenglin. "Passive Adjoint Tomography of the Crustal and Upper Mantle Beneath Eastern Tibet With a W2‐Norm Misfit Function." <i>Geophysical Research Letters,</i> 46, no. 22 (2019) Wiley: 12986-12995. https://doi.org/10.1029/2019GL085515.en_US
dc.identifier.digital2019GL085515en_US
dc.identifier.doihttps://doi.org/10.1029/2019GL085515en_US
dc.identifier.urihttps://hdl.handle.net/1911/108031en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titlePassive Adjoint Tomography of the Crustal and Upper Mantle Beneath Eastern Tibet With a W2‐Norm Misfit Functionen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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