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In this study we assess the robustness of lateral variations in radial anisotropy globally in the upper mantle and in the transition zone to determine the extent to which anisotropic parameters are constrained by a data set of over 10,000,000 fundamental and higher mode surface wave dispersion measurements. We carry out inversions for isotropic and radially anisotropic shear wave velocity, systematically changing regularization and using three different crustal models to remove the effects of the crust on the data. Using crustal corrections from different crustal models has an impact on the data fit comparable or larger than that obtained by including lateral variations of radial anisotropy in the modeling. Moreover, the use of crustal corrections from different <jats:italic>a priori<\/jats:italic> crustal models may lead to different images of radial anisotropy suggesting divergent geodynamical interpretations. This work suggests that the three\u2010dimensional determination of global radial anisotropy in the Earth's mantle using surface wave dispersion data is still an ongoing experiment.<\/jats:p>","DOI":"10.1029\/2009jb006716","type":"journal-article","created":{"date-parts":[[2010,4,22]],"date-time":"2010-04-22T20:00:37Z","timestamp":1271966437000},"source":"Crossref","is-referenced-by-count":85,"title":["On the robustness of global radially anisotropic surface wave tomography"],"prefix":"10.1029","volume":"115","author":[{"given":"A. M. G.","family":"Ferreira","sequence":"first","affiliation":[{"name":"School of Environmental Sciences University of East Anglia  Norwich UK"},{"name":"ICIST, Instituto Superior T\u00e9cnico Technical University of Lisbon  Lisbon Portugal"}]},{"given":"J. H.","family":"Woodhouse","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences University of Oxford  Oxford UK"}]},{"given":"K.","family":"Visser","sequence":"additional","affiliation":[{"name":"Built Environment and Geosciences TNO  Utrecht Netherlands"}]},{"given":"J.","family":"Trampert","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences Utrecht University  Utrecht Netherlands"}]}],"member":"13","published-online":{"date-parts":[[2010,4,23]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"243","article-title":"Phase velocity of love waves in Japan, Part i: Love waves from the Aleutian shock of March 1957","volume":"41","author":"Aki K.","year":"1963","journal-title":"Bull. Earthquakes Res. Inst. Univ. 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