High fidelity modelling of iceberg capsize

Nicolas de Pinho Dias, Alban Leroyer, Anne Mangeney, Olivier Castelnau,
Jean-Baptiste Thiebot

► To cite this version:

Nicolas de Pinho Dias, Alban Leroyer, Anne Mangeney, Olivier Castelnau, Jean-Baptiste Thiebot. High fidelity modelling of iceberg capsize. EGU General Assembly 2024, Apr 2024, Vienne, Austria. 10.5194/egusphere-egu24-7829 . hal-05194324

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Distributed under a Creative Commons Attribution 4.0 International License
EGU24-7829, updated on 08 Mar 2024

https://doi.org/10.5194/egusphere-egu24-7829

EGU General Assembly 2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

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High fidelity modelling of iceberg capsize

Nicolas De Pinho Dias et al. ▶

One of the major questions in climate science is to improve the accuracy of sea-level rise prediction, for which mass loss of the polar ice cap
In this work, the focus is on buoyancy-dominated capsize of large icebergs. The capsizes generate specific seismic signals, which in turn
unique tool to study the long term evolution of such large icebergs capsize and the glacier response.

To better quantify ice mass loss due to iceberg calving at marine terminating glaciers, coupling iceberg calving simulation and inversion of the capsize history is necessary. To achieve this, a complex fluid/structure model of the iceberg capsiz forces acting on the glacier terminus. The simulated forces can then be compared to the force inverted from the seismic signal. There we implement a Computation Fluid Dynamics (CFD) approach to reach a high fidelity modelling of the iceberg capsize. First work using the capsize showed the need and ability of CFD computations to precisely reproduce the iceberg kinematics for different cases. We will present configurations, including the contact between the capsizing iceberg and a rigid glacier front. Computation results are compared and validated against observations where we outline that some 3D effects cannot be neglected. We will also present full scale capsize simulations, in which the mixing of ocean water and icebergs will quantify the transport of particles within the ocean to illustrate the potential change of nutriments distribution or of pressure experienced during calving.

**How to cite:** De Pinho Dias, N., Leroyer, A., Mangeney, A., Castelnau, O., and Thiebot, J.-B.: High fidelity modelling of iceberg capsize, EGU General Assembly, 14–19 Apr 2024, EGU24-7829, https://doi.org/10.5194/egusphere-egu24-7829, 2024.