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3-D thermal structure Cite as Ben-Mansour, W., Afonso, J., & Wiens, D. (2026) "3-D thermal structure" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/None. Abstract We jointly invert high resolution regional seismological shear wave data, satellite gravity information, and topography to determine the 3D thermochemical structure of the mantle. The inversion was carried out using a Markov-chain Bayesian Monte Carlo methodology, providing quantitative estimates uncertainties. The new 3D thermal structure gives us the temperature variation from surface down to 380km as well as the lithosphere asthenosphere boundary (1250C). Creator(s): Ben-Mansour, Walid; Wiens, Douglas; Afonso, Juan Carlos Date Created: 2026-06-26 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -180, East: 180, South: -90, North: -60 Award(s) NSF 2203487 Version: 1 Related Project(s) Thermal and Compositional Structure of Antarctica from Probabilistic Joint Inversion of Seismic, Gravity, and Topography Data and Petrological Modelling Keywords Antarctica Cryosphere Heat Flux Lithospheric Thickness Solid Earth - Mantle