AlpRA25 - Radial Anisotropy and Shear-Wave Velocity Model of the Alps

# AlpRA25: Seismic Radial Anisotropy Model of the Alps ## OverviewThis repository contains the 3D NetCDF model file for **AlpRA25**, associated with the research paper:> **"Imaging the Alpine Collision with Seismic Radial Anisotropy"**> *Henrique Roisenberg et al. (2026)* The dataset provides 3D grids of absolute isotropic shear-wave velocity ($V_S$), polarized shear-wave velocities ($V_{SH}$, $V_{SV}$), relative velocity perturbations ($dV$), and radial anisotropy ($\xi$) across both crustal and mantle domains unified within a single NetCDF file. --- ## Repository Contents ### Model File* **`AlpRA25.nc`**: Complete 3D tomographic volume containing absolute velocities, relative perturbations, and radial anisotropy parameters for the Alps down to 250 km depth. --- ## Data Structure & Variables The NetCDF file (`AlpRA25.nc`) is formatted in **NetCDF4** and contains the following dimensions and variables: ### Dimensions* **`longitude`** (110): Longitude in degrees East.* **`latitude`** (64): Latitude in degrees North.* **`depth`** (251): Depth below sea level in kilometers (km). ### Variables | Variable Name | Description | Units / Definition || :--- | :--- | :--- || **`longitude`** | Geographic longitude | degrees_east || **`latitude`** | Geographic latitude | degrees_north || **`depth`** | Depth below sea level | km || **`vs`** | Isotropic shear-wave velocity | km/s || **`vsv`** | Vertically polarized shear-wave velocity | km/s || **`vsh`** | Horizontally polarized shear-wave velocity | km/s || **`dVs_crust`** | Relative $V_S$ perturbation (Crust) | fractional / % || **`dVs_mantle`** | Relative $V_S$ perturbation (Mantle) | fractional / % || **`dVsv_crust`** | Relative $V_{SV}$ perturbation (Crust) | fractional / % || **`dVsv_mantle`** | Relative $V_{SV}$ perturbation (Mantle) | fractional / % || **`dVsh_crust`** | Relative $V_{SH}$ perturbation (Crust) | fractional / % || **`dVsh_mantle`** | Relative $V_{SH}$ perturbation (Mantle) | fractional / % || **`xi_crust`** | Radial anisotropy parameter in the crust | $\xi = (V_{SH}/V_{SV})^2$ || **`xi_mantle`** | Radial anisotropy parameter in the mantle | $\xi = (V_{SH}/V_{SV})^2$ | --- ## Citation If you use the AlpRA25 model in your research, please cite the research paper and the repository. --- ## Data Availability & Contact The AlpRA25 model is freely available for non-commercial research and educational use. For questions regarding the model, inversion methodology, or file compatibility, please contact: **Henrique Roisenberg**Institute of Geosciences, Kiel University (CAU)Email: [[e-mail]](mailto:[e-mail])