2025_programme: The challenges of portability and scalability of seismo-acoustic propagation codes - Application to the modeling of the wave propagation generated by underwater explosions in the Bay of Hyères, France.
- Day: June 17, Tuesday
Location / Time: B. ERATO at 15:50-16:10
- Last minutes changes: -
- Session: 24. Underwater Seismoacoustics
Organiser(s): Nathalie Favretto-Cristini, Paul Cristini
Chairperson(s): Nathalie Favretto-Cristini, Paul Cristini
- Lecture: The challenges of portability and scalability of seismo-acoustic propagation codes - Application to the modeling of the wave propagation generated by underwater explosions in the Bay of Hyères, France.
Paper ID: 2181
Author(s): Maxence Ferrari, Vadim Monteiller, Paul Cristini, Nathalie Favretto-Cristini
Presenter: Maxence Ferrari
Abstract: Recent literature has reported on the sensitivity of benthic marine species to seafloor vibrations caused by anthropogenic activities on the seabed, such as the detonation of historical explosive devices (UXO). These vibrations mainly result from the propagation of interface waves. Assessing upstream underwater noise pollution therefore requires the ability to model all the waves present in an environment, within the limits of our knowledge of the geometry and physical properties of this environment. However, the algorithmic complexity of full-wave 3D modeling increases proportionally to the fourth power of the frequency, which limits its implementation.\nAs part of the European CHEESE-2P project, two solutions are being explored to tackle this issue: on the one hand, increasing computing capacity, and on the other, specialized algorithmic optimization for GPUs (Graphical Processing Units), while ensuring portability of the numerical code, i.e. its ability to run efficiently on CPUs (Central Processing Units) architectures or different brands of GPUs. The use of the Kokkos library ensures this portability, while maintaining optimal performance on different HPC (High Performance Computing) platforms.\nWe illustrate the potential of these solutions by using SPECFEM software to simulate the 3D propagation of seismo-acoustic waves generated by the detonation of UXO in the Bay of Hyères, France. The simulation, carried out over a large area (2 000 km3), takes into account the 3D complexity of the environment (e.g. spatially variable bathymetry and physical properties, presence of islands and sedimentary basins) and aims to achieve a maximum frequency of 100 Hz, while optimizing the use of VRAM (GPU memory).\nThis study is a first step towards pushing back current computational limits to better understand and reduce the impact of underwater noise pollution.\nThis work has received funding from the European High Performance Computing Joint Undertaking (JU) and France (PEPR NumPex) under GA 101093038.
- Corresponding author: Dr Maxence Ferrari
Affiliation: Aix Marseille Univ, CNRS, Centrale Med, LMA UMR 7031, Marseille, France
Country: France
