S40RTS a new degree-40 shear velocity model of the mantle

We present a new shear velocity model of the mantle based on a new set of teleseismic travel time, surface wave dispersion and normal mode frequencies. The travel time data set includes approximately 500,000 long-period (T>20 s) traveltimes of S and SKS, core-reflections (ScS, ScS2, ScS3, ScS4), and surface reflections along the minor (SS, SSS, SSSS) and major (SSm, SSSm) arcs. The traveltimes have been corrected for Earth's elliptical shape. Long period traveltime corrections are calculated using the a priori model Crust2.0. The surface wave data consists of almost 20 million dispersion measurements (38-300 s) of fundamental mode and overtone surface waves along the minor and major arcs. Crustal effects are corrected for using local eigenfrequencies calculated for Crust2.0. The normal mode dataset consists of a new set of splitting functions for frequencies lower than 3mHz. Variations of velocity in S40RTS are parameterised using 30 vertical splines and spherical harmonics up to degree and order 40. We illustrate S40RTS with maps and cross-sections and we discuss how the model and its resolution matrix can be made available to interested researchers.