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Communication Dans Un Congrès Année : 2020

Monitoring sea ice with seismic noise

Ludovic Moreau
Pierre Boué
Jérôme Weiss

Résumé

Field data are needed for a better understanding of sea ice decline in the context of climate change. The rapid technological and methodological advances of the last decade have led to a reconsideration of seismic methods in this matter. In particular, passive seismology has filled an important gap by removing the need to use active sources. We present a seismic experiment where an array of 247 geophones was deployed on sea ice, in the Van Mijen fjord near Sveagruva (Svalbard). Stations recorded continuously the ambient seismic field in sea ice between 28 February and 26 March 2019. From the noise correlation function, the Green?s function between the stations of the array is recovered and used to calculate the dispersion curves of the ice layer. These dispersion curves are then used in the inverse problem to infer sea ice thickness and mechanical properties.
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Dates et versions

hal-03240220 , version 1 (28-05-2021)

Identifiants

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Ludovic Moreau, Agathe Serripierri, Pierre Boué, Jérôme Weiss. Monitoring sea ice with seismic noise. Forum Acusticum, Dec 2020, Lyon, France. pp.2107-2113, ⟨10.48465/fa.2020.0099⟩. ⟨hal-03240220⟩
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