Analysis of hydroacoustic data from the open ocean – Modelling of acoustic sources and generated acoustic waves (submarine earthquakes and volcanism)
This post-doctoral project is part of the ANR MUSIC project (Marine soundscape in the Southern Indian Ocean). The project team includes specialists in seismology, marine volcanism and midoceanic spreading ridge geodynamics. Collaboration with acousticians from the French Naval Academy (IRENAV) and foreign specialists will complete these fields of expertise.
The position will be based in Plouzané, near Brest, in the Geo-Ocean unit (UMR6538), a multidisciplinary research unit specializing in the study of the Earth and oceans and their interactions. This joint laboratory of the University of Brest, CNRS and Ifremer is made up of 5 research teams and employs 220 people, including 130 permanent staff (researchers, faculties researchers, engineers and technicians). The researcher will be part of the ALMA (Aléas Marins/Marine hazards) team.
The ANR MUSIC project, of which this post-doctorate is a part, aims to analyze in greater depth the hydroacoustic data recorded by the OHASISBIO hydrophone network in the Southern Indian Ocean, installed to monitor the seismicity of the three mid-oceanic Indian ridges (Southwest, Central and Southeast). The dataset consists of continuous recordings from 9 hydrophones moored in the SOFAR channel (~ 1000 m depth) between 2009 and 2023. Networks of moored hydrophones are an effective way of monitoring the ocean soundscape generated, in the low frequency range (0-125 Hz), by earthquakes, undersea volcanic eruptions, marine mammals, iceberg calving, weather, sea-state, and ship noise.
The purpose of the postdoc is to simulate the generation and propagation of acoustic waves generated by seismic (T-wave) and volcanic (H-wave) sources using acoustic modelling (e.g. COMSOL, BELLHOP, KRAKEN, SPECFEM). The goal is to better constrain the source parameters (mechanism, depth, energy release, etc) of events observed in the OHASISBIO datasets.
Analysis of acoustic data from the OHASISBIO network.
Selection of remarkable events. Modeling of acoustic wave generation and propagation mechanisms.
• Solid background in physics and/or wave propagation
• Programming skills
• A positive aptitude for teamwork and writing scientific papers is essential
• Fluent english required (spoken, writing). French not required but appreciated.
18 months
01/09/2025
PLOUZANE (Brest), France
3021 € - 3451 €
Contacts
Sara Bazin
Jean-Yves Royer
