USAP-DC

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Collaborative Research: Seismic Investigation of the Sub-ice Environment and Crustal Composition of Antarctica Short Title: Antarctic radial and azimuthal anisotropy models Start Date: 2020-08-01 End Date: 2024-07-31 Description/Abstract This project provides Antarctic crustal and uppermost-mantle models from ambient-noise tomography. The radial-anisotropy dataset contains shear-wave velocity, radial anisotropy, Moho depth, sediment thickness and uncertainty fields. The azimuthal-anisotropy dataset contains anisotropy amplitudes, fast-axis directions, uncertainties, reference structure and node misfit values. Both datasets are archived on Zenodo as NetCDF grids and text tables with a README describing fields and units. Related papers: https://doi.org/10.1029/2021JB022857 and https://doi.org/10.1029/2023JB027556. Personnel Person Role Zhou, Zhengyang Investigator and contact Wiens, Douglas Investigator Shen, Weisen Investigator Funding Antarctic Earth Sciences Award # 1945856 Antarctic Earth Sciences Award # 1945693 AMD - DIF Record(s) USAP-1945693_1 Data Management Plan None in the Database Product Level: 4 (model output and interpretations) Datasets Repository Title (link) Format(s) Status Zenodo Antarctica crust and uppermost-mantle shear-velocity and radial-anisotropy model from ambient-noise Rayleigh- and Love-wave tomography netCDF; Text File exists Zenodo Antarctica shallow-crustal and uppermost-mantle azimuthal-anisotropy model from ambient-noise Rayleigh-wave tomography netCDF; Text File exists Publications Zhou, Z., Wiens, D. A., Shen, W., Aster, R. C., Nyblade, A., & Wilson, T. J. (2022). Radial Anisotropy and Sediment Thickness of West and Central Antarctica Estimated From Rayleigh and Love Wave Velocities. Journal of Geophysical Research: Solid Earth, 127(3), e2021JB022857. (doi:10.1029/2021JB022857) Zhou, Z., Wiens, D. A., Nyblade, A. A., Aster, R. C., Wilson, T., & Shen, W. (2024). Crustal and Uppermost Mantle Azimuthal Seismic Anisotropy of Antarctica From Ambient Noise Tomography. Journal of Geophysical Research: Solid Earth, 129(1), e2023JB027556. (doi:10.1029/2023JB027556) Keywords Antarctica Crust SEISMIC SURFACE WAVES