Oral A2 Coastal Resilience & Hazard Mitigation

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)

[swOhB7iC-02] Pumice drift simulation and visualization

*Haruka Nishikawa¹ (1. JAMSTEC (Japan))

Drifting pumice generated by submarine volcanic eruptions poses a serious threat to marine transportation, fisheries, and the tourism industry, particularly in volcanic countries such as Japan. When a submarine volcanic eruption occurs, predicting the distribution of drifting pumice is essential. Particle tracking experiments using ocean hydrodynamic models are useful for predicting pumice distribution. In such simulations, the choice of the horizontal diffusion coefficient plays an important role. However, the appropriate value of the horizontal diffusion coefficient is not uniquely determined. It must be selected to account for the effects of Stokes drift and other processes that cannot be reproduced by the model, such as finer-scale eddies, in order to improve the accuracy of pumice distribution predictions. Therefore, the appropriate horizontal diffusion coefficient depends on the model and its temporal and spatial resolution. We aim to develop a digital twin of submarine volcanic eruptions for the creation of realistic hazard maps. As part of this digital twin, we visualize particle tracking experiments performed using various ocean hydrodynamic models and different horizontal diffusion coefficients. Visualization is important not only for highlighting the differences among models but also as a key component of the digital twin. In particular, this study discusses the usefulness of visualization for the development of hazard maps.