3D representation of the 2023 Dickson fjord seiche in Greenland - Zoom on Dickson fjord скачать в хорошем качестве

3D representation of the 2023 Dickson fjord seiche in Greenland - Zoom on Dickson fjord

This is a 3D representation of the simulation shown in the video    • Simulation of the 2023 Dickson fjord seich...   , similar to the one in    • 3D representation of the 2023 Dickson fjor...   but with a zoom on Dickson fjord. On 16th of September, 2023, seismologists around the world recorded an unusual signal, with an oscillation period of 90 seconds, and that lasted for 9 days. As explained in the video    • How climate change triggered a landslide t...   , scientists found out that the origin of the signal was a landslide in uninhabited Dickson fjord in eastern Greenland, probably due to the collapse of a melting glacier. This landslide caused a tsunami with 200 meter high waves in the fjord. Fortunately, the wave height quickly decreased with distance from the landslide. The seismic signal was shown to have been caused by a standing wave in Dickson fjord, called a seiche, that took 9 days to dissipate. This very simplified simulation uses the wave equation with Dirichlet boundary conditions on the land masses. Other boundary conditions, such as Neumann, may be more appropriate, but are harder to implement. Still, I found it remarkable that a large part of the energy remains concentrated in Dickson fjord, as one would expect from a seiche. The video    • Modeling the 2023 tsunami due to a landsli...   simulates the same event, on a much larger scale and using a shallow water equation. The video has two parts, showing the same simulation with two different visualizations: Wave height: 0:00 Wave energy: 1:44 In the first part, the z-coordinate and color depend on the wave height. In the second part, they depend on the energy, averaged from the beginning of the simulation. Thanks to Florentin Bieder from the University of Basel for letting me know about these findings. Render time: 16 minutes 53 seconds Color scheme: Part I - Viridis by Nathaniel J. Smith, Stefan van der Walt and Eric Firing Part 2 - Plasma by Nathaniel J. Smith and Stefan van der Walt https://github.com/BIDS/colormap Music: "Gently, Onwards" by ELPHNT‪@ELPHNT‬ See also https://images.math.cnrs.fr/des-ondes... for more explanations (in French) on a few previous simulations of wave equations. The simulation solves the 2D shallow water equation by discretization (finite differences). C code: https://github.com/nilsberglund-orlea... https://www.idpoisson.fr/berglund/sof... Many thanks to Marco Mancini and Julian Kauth for helping me to accelerate my code! #shallowwater #waves #Earth #tsunami