Joint inversion for global isotropic and radially anisotropic mantle structure including crustal thickness perturbations

摘要: We present a new global whole-mantle model of isotropic and radially anisotropic S velocity structure (SGLOBE-rani) based on ~43,000,000 surface wave ~420,000 body travel time measurements, which is expanded in spherical harmonic basis functions up to degree 35. incorporate crustal thickness perturbations as parameters the inversions properly consider effects suppress leakage into mantle structure. This possible since we utilize short-period group-velocity data with period range down 16 s, are strongly sensitive crust. The shares common features previous models shows excellent consistency several high-resolution upper models. Our also agrees well regional studies. Anomalous our faster SV anomalies along subduction zones at transition zone depths SH beneath slabs lower mantle. derived bring potentially important information about oceanic crusts, has been difficult constrain due poor access compared continental crusts.